/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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 17:47:50,206 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 17:47:50,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 17:47:50,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-01 17:47:50,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-01 17:47:50,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-01 17:47:50,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-01 17:47:50,298 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.epf [2022-03-01 17:47:50,325 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 17:47:50,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 17:47:50,325 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 17:47:50,326 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 17:47:50,326 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 17:47:50,326 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 17:47:50,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 17:47:50,327 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 17:47:50,327 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 17:47:50,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 17:47:50,327 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 17:47:50,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 17:47:50,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 17:47:50,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 17:47:50,328 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 17:47:50,328 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 17:47:50,328 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 17:47:50,328 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 17:47:50,328 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 17:47:50,328 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 17:47:50,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 17:47:50,329 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 17:47:50,329 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 17:47:50,329 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 17:47:50,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 17:47:50,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:47:50,330 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 17:47:50,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 17:47:50,330 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 17:47:50,330 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 17:47:50,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 17:47:50,331 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 17:47:50,331 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 17:47:50,331 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 17:47:50,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 17:47:50,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 17:47:50,522 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 17:47:50,523 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 17:47:50,523 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 17:47:50,524 INFO L432 ainManager$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 [2022-03-01 17:47:50,525 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl' [2022-03-01 17:47:50,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 17:47:50,544 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 17:47:50,544 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 17:47:50,545 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 17:47:50,545 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 17:47:50,552 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 01.03 05:47:50" (1/1) ... [2022-03-01 17:47:50,557 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 01.03 05:47:50" (1/1) ... [2022-03-01 17:47:50,562 INFO L137 Inliner]: procedures = 7, calls = 6, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 17:47:50,563 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 17:47:50,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 17:47:50,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 17:47:50,564 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 17:47:50,569 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 01.03 05:47:50" (1/1) ... [2022-03-01 17:47:50,569 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 01.03 05:47:50" (1/1) ... [2022-03-01 17:47:50,570 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 01.03 05:47:50" (1/1) ... [2022-03-01 17:47:50,570 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 01.03 05:47:50" (1/1) ... [2022-03-01 17:47:50,572 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 01.03 05:47:50" (1/1) ... [2022-03-01 17:47:50,574 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 01.03 05:47:50" (1/1) ... [2022-03-01 17:47:50,574 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 01.03 05:47:50" (1/1) ... [2022-03-01 17:47:50,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 17:47:50,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 17:47:50,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 17:47:50,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 17:47:50,579 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:47:50" (1/1) ... [2022-03-01 17:47:50,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:47:50,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:50,602 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) [2022-03-01 17:47:50,617 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 [2022-03-01 17:47:50,638 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 17:47:50,638 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 17:47:50,638 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 17:47:50,638 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 17:47:50,638 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 17:47:50,638 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 17:47:50,639 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 17:47:50,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 17:47:50,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 17:47:50,639 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-01 17:47:50,639 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-01 17:47:50,639 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-01 17:47:50,639 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-03-01 17:47:50,639 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-03-01 17:47:50,639 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-03-01 17:47:50,639 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2022-03-01 17:47:50,640 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-03-01 17:47:50,640 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-03-01 17:47:50,640 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2022-03-01 17:47:50,640 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-03-01 17:47:50,640 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-03-01 17:47:50,640 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 17:47:50,677 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 17:47:50,678 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 17:47:50,842 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 17:47:50,870 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 17:47:50,870 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-03-01 17:47:50,871 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-03-01 17:47:50,871 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2022-03-01 17:47:50,871 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2022-03-01 17:47:50,872 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2022-03-01 17:47:50,873 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 05:47:50 BoogieIcfgContainer [2022-03-01 17:47:50,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 17:47:50,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 17:47:50,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 17:47:50,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 17:47:50,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:47:50" (1/2) ... [2022-03-01 17:47:50,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4042531e and model type parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 05:47:50, skipping insertion in model container [2022-03-01 17:47:50,890 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 01.03 05:47:50" (2/2) ... [2022-03-01 17:47:50,893 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-2.wvr.bpl [2022-03-01 17:47:50,896 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 17:47:50,896 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 17:47:50,896 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 17:47:50,896 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 17:47:50,971 INFO L148 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2022-03-01 17:47:51,008 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 17:47:51,012 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, 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, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-01 17:47:51,013 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-03-01 17:47:51,019 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 55 transitions, 182 flow [2022-03-01 17:47:51,077 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 445 states, 444 states have (on average 3.7905405405405403) internal successors, (1683), 444 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:51,080 INFO L276 IsEmpty]: Start isEmpty. Operand has 445 states, 444 states have (on average 3.7905405405405403) internal successors, (1683), 444 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:51,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-01 17:47:51,096 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:51,097 INFO L514 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] [2022-03-01 17:47:51,097 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:51,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:51,102 INFO L85 PathProgramCache]: Analyzing trace with hash 614274337, now seen corresponding path program 1 times [2022-03-01 17:47:51,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:51,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986296286] [2022-03-01 17:47:51,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:51,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:51,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:51,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986296286] [2022-03-01 17:47:51,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986296286] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:47:51,288 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:47:51,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 17:47:51,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259378171] [2022-03-01 17:47:51,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:47:51,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:47:51,293 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:51,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:47:51,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:47:51,314 INFO L87 Difference]: Start difference. First operand has 445 states, 444 states have (on average 3.7905405405405403) internal successors, (1683), 444 states have internal predecessors, (1683), 0 states have call successors, (0), 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) [2022-03-01 17:47:51,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:51,551 INFO L93 Difference]: Finished difference Result 893 states and 3368 transitions. [2022-03-01 17:47:51,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:47:51,553 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 [2022-03-01 17:47:51,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:51,580 INFO L225 Difference]: With dead ends: 893 [2022-03-01 17:47:51,580 INFO L226 Difference]: Without dead ends: 874 [2022-03-01 17:47:51,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:47:51,588 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:51,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 48 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:47:51,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-03-01 17:47:51,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 598. [2022-03-01 17:47:51,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.809045226130653) internal successors, (2274), 597 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:51,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 2274 transitions. [2022-03-01 17:47:51,658 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 2274 transitions. Word has length 25 [2022-03-01 17:47:51,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:51,659 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 2274 transitions. [2022-03-01 17:47:51,659 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) [2022-03-01 17:47:51,659 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 2274 transitions. [2022-03-01 17:47:51,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-01 17:47:51,663 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:51,663 INFO L514 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] [2022-03-01 17:47:51,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 17:47:51,663 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:51,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:51,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1825623495, now seen corresponding path program 2 times [2022-03-01 17:47:51,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:51,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909251155] [2022-03-01 17:47:51,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:51,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:51,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:51,752 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:51,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909251155] [2022-03-01 17:47:51,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909251155] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:47:51,752 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:47:51,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 17:47:51,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58003524] [2022-03-01 17:47:51,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:47:51,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:47:51,754 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:51,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:47:51,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:47:51,754 INFO L87 Difference]: Start difference. First operand 598 states and 2274 transitions. 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) [2022-03-01 17:47:51,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:51,882 INFO L93 Difference]: Finished difference Result 872 states and 3319 transitions. [2022-03-01 17:47:51,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:47:51,883 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 [2022-03-01 17:47:51,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:51,888 INFO L225 Difference]: With dead ends: 872 [2022-03-01 17:47:51,888 INFO L226 Difference]: Without dead ends: 841 [2022-03-01 17:47:51,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:47:51,893 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:51,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 48 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:47:51,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-03-01 17:47:51,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 596. [2022-03-01 17:47:51,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.7663865546218487) internal successors, (2241), 595 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:51,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 2241 transitions. [2022-03-01 17:47:51,930 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 2241 transitions. Word has length 25 [2022-03-01 17:47:51,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:51,930 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 2241 transitions. [2022-03-01 17:47:51,931 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) [2022-03-01 17:47:51,931 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 2241 transitions. [2022-03-01 17:47:51,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:47:51,936 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:51,936 INFO L514 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] [2022-03-01 17:47:51,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-01 17:47:51,936 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:51,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:51,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1890170752, now seen corresponding path program 1 times [2022-03-01 17:47:51,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:51,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660192537] [2022-03-01 17:47:51,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:51,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:51,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:51,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:51,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660192537] [2022-03-01 17:47:51,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660192537] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:47:51,985 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:47:51,985 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 17:47:51,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805430567] [2022-03-01 17:47:51,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:47:51,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:47:51,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:51,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:47:51,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:47:51,987 INFO L87 Difference]: Start difference. First operand 596 states and 2241 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) [2022-03-01 17:47:52,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:52,079 INFO L93 Difference]: Finished difference Result 867 states and 3197 transitions. [2022-03-01 17:47:52,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:47:52,079 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 [2022-03-01 17:47:52,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:52,084 INFO L225 Difference]: With dead ends: 867 [2022-03-01 17:47:52,084 INFO L226 Difference]: Without dead ends: 836 [2022-03-01 17:47:52,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:47:52,090 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 62 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:52,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 55 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:47:52,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-03-01 17:47:52,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 734. [2022-03-01 17:47:52,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 3.8663028649386084) internal successors, (2834), 733 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:52,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2834 transitions. [2022-03-01 17:47:52,114 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2834 transitions. Word has length 27 [2022-03-01 17:47:52,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:52,114 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 2834 transitions. [2022-03-01 17:47:52,114 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) [2022-03-01 17:47:52,114 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2834 transitions. [2022-03-01 17:47:52,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:47:52,117 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:52,117 INFO L514 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] [2022-03-01 17:47:52,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-01 17:47:52,117 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:52,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:52,118 INFO L85 PathProgramCache]: Analyzing trace with hash 153525504, now seen corresponding path program 2 times [2022-03-01 17:47:52,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:52,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256352474] [2022-03-01 17:47:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:52,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:52,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:52,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:52,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256352474] [2022-03-01 17:47:52,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256352474] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:47:52,164 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:47:52,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 17:47:52,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178997449] [2022-03-01 17:47:52,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:47:52,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:47:52,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:52,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:47:52,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:47:52,165 INFO L87 Difference]: Start difference. First operand 734 states and 2834 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) [2022-03-01 17:47:52,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:52,230 INFO L93 Difference]: Finished difference Result 736 states and 2873 transitions. [2022-03-01 17:47:52,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:47:52,232 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 [2022-03-01 17:47:52,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:52,235 INFO L225 Difference]: With dead ends: 736 [2022-03-01 17:47:52,235 INFO L226 Difference]: Without dead ends: 655 [2022-03-01 17:47:52,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:47:52,240 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:52,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 50 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:47:52,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-03-01 17:47:52,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 571. [2022-03-01 17:47:52,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 3.8526315789473684) internal successors, (2196), 570 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:52,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 2196 transitions. [2022-03-01 17:47:52,257 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 2196 transitions. Word has length 27 [2022-03-01 17:47:52,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:52,257 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 2196 transitions. [2022-03-01 17:47:52,257 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) [2022-03-01 17:47:52,257 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 2196 transitions. [2022-03-01 17:47:52,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:47:52,259 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:52,259 INFO L514 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] [2022-03-01 17:47:52,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-01 17:47:52,259 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:52,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:52,261 INFO L85 PathProgramCache]: Analyzing trace with hash -481159728, now seen corresponding path program 1 times [2022-03-01 17:47:52,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:52,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601605245] [2022-03-01 17:47:52,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:52,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:52,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:52,288 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:52,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601605245] [2022-03-01 17:47:52,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601605245] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:52,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367204926] [2022-03-01 17:47:52,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:52,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:52,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:52,290 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) [2022-03-01 17:47:52,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 17:47:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:52,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 17:47:52,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:52,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:52,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367204926] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:52,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:52,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-03-01 17:47:52,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442883742] [2022-03-01 17:47:52,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:52,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:47:52,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:52,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:47:52,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:47:52,499 INFO L87 Difference]: Start difference. First operand 571 states and 2196 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) [2022-03-01 17:47:52,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:52,566 INFO L93 Difference]: Finished difference Result 898 states and 3436 transitions. [2022-03-01 17:47:52,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:47:52,566 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 [2022-03-01 17:47:52,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:52,571 INFO L225 Difference]: With dead ends: 898 [2022-03-01 17:47:52,571 INFO L226 Difference]: Without dead ends: 838 [2022-03-01 17:47:52,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:47:52,574 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:52,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 49 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:47:52,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-03-01 17:47:52,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 754. [2022-03-01 17:47:52,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.911022576361222) internal successors, (2945), 753 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:52,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2945 transitions. [2022-03-01 17:47:52,620 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2945 transitions. Word has length 27 [2022-03-01 17:47:52,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:52,620 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 2945 transitions. [2022-03-01 17:47:52,620 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) [2022-03-01 17:47:52,620 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2945 transitions. [2022-03-01 17:47:52,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:47:52,623 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:52,623 INFO L514 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] [2022-03-01 17:47:52,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:52,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:52,839 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:52,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:52,840 INFO L85 PathProgramCache]: Analyzing trace with hash -522499450, now seen corresponding path program 2 times [2022-03-01 17:47:52,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:52,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569115960] [2022-03-01 17:47:52,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:52,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:52,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:52,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569115960] [2022-03-01 17:47:52,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569115960] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:47:52,862 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:47:52,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-01 17:47:52,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64038499] [2022-03-01 17:47:52,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:47:52,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:47:52,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:52,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:47:52,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:47:52,863 INFO L87 Difference]: Start difference. First operand 754 states and 2945 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) [2022-03-01 17:47:52,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:52,926 INFO L93 Difference]: Finished difference Result 854 states and 3195 transitions. [2022-03-01 17:47:52,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:47:52,927 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 [2022-03-01 17:47:52,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:52,931 INFO L225 Difference]: With dead ends: 854 [2022-03-01 17:47:52,931 INFO L226 Difference]: Without dead ends: 812 [2022-03-01 17:47:52,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:47:52,932 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 60 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:52,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 52 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:47:52,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-03-01 17:47:52,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 733. [2022-03-01 17:47:52,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 3.9139344262295084) internal successors, (2865), 732 states have internal predecessors, (2865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2865 transitions. [2022-03-01 17:47:52,953 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2865 transitions. Word has length 27 [2022-03-01 17:47:52,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:52,953 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 2865 transitions. [2022-03-01 17:47:52,953 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) [2022-03-01 17:47:52,953 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2865 transitions. [2022-03-01 17:47:52,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:47:52,955 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:52,955 INFO L514 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] [2022-03-01 17:47:52,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-01 17:47:52,956 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:52,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:52,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1959647599, now seen corresponding path program 1 times [2022-03-01 17:47:52,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:52,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294705768] [2022-03-01 17:47:52,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:52,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:53,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:53,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294705768] [2022-03-01 17:47:53,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294705768] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:53,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874336534] [2022-03-01 17:47:53,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:53,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:53,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:53,136 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) [2022-03-01 17:47:53,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 17:47:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:53,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:47:53,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:53,521 INFO L387 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 [2022-03-01 17:47:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:53,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:53,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:53,779 INFO L387 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 17 treesize of output 22 [2022-03-01 17:47:53,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:53,795 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:47:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:53,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874336534] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:53,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:53,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-01 17:47:53,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419952910] [2022-03-01 17:47:53,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:53,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:47:53,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:53,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:47:53,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:47:53,853 INFO L87 Difference]: Start difference. First operand 733 states and 2865 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:54,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:54,934 INFO L93 Difference]: Finished difference Result 1214 states and 4693 transitions. [2022-03-01 17:47:54,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:47:54,934 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:47:54,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:54,940 INFO L225 Difference]: With dead ends: 1214 [2022-03-01 17:47:54,940 INFO L226 Difference]: Without dead ends: 1195 [2022-03-01 17:47:54,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:47:54,941 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 346 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 1622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:54,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 452 Invalid, 1622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1581 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:47:54,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-03-01 17:47:54,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 839. [2022-03-01 17:47:54,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 3.908114558472554) internal successors, (3275), 838 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:54,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 3275 transitions. [2022-03-01 17:47:54,962 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 3275 transitions. Word has length 29 [2022-03-01 17:47:54,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:54,962 INFO L470 AbstractCegarLoop]: Abstraction has 839 states and 3275 transitions. [2022-03-01 17:47:54,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:54,962 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 3275 transitions. [2022-03-01 17:47:54,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:47:54,964 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:54,964 INFO L514 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] [2022-03-01 17:47:54,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:55,180 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,SelfDestructingSolverStorable6 [2022-03-01 17:47:55,181 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:55,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:55,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1724936761, now seen corresponding path program 2 times [2022-03-01 17:47:55,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:55,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854203592] [2022-03-01 17:47:55,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:55,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:55,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:55,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:55,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854203592] [2022-03-01 17:47:55,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854203592] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:55,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202299096] [2022-03-01 17:47:55,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:47:55,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:55,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:55,302 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) [2022-03-01 17:47:55,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 17:47:55,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:47:55,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:55,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:47:55,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:55,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:55,582 INFO L387 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 17 treesize of output 21 [2022-03-01 17:47:55,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:55,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:55,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202299096] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:55,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:55,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-01 17:47:55,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655683756] [2022-03-01 17:47:55,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:55,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:47:55,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:55,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:47:55,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:47:55,890 INFO L87 Difference]: Start difference. First operand 839 states and 3275 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:56,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:56,352 INFO L93 Difference]: Finished difference Result 1161 states and 4488 transitions. [2022-03-01 17:47:56,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:47:56,353 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:47:56,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:56,359 INFO L225 Difference]: With dead ends: 1161 [2022-03-01 17:47:56,359 INFO L226 Difference]: Without dead ends: 1142 [2022-03-01 17:47:56,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:47:56,360 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 147 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:56,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 291 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:47:56,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-03-01 17:47:56,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 842. [2022-03-01 17:47:56,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.906064209274673) internal successors, (3285), 841 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:56,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 3285 transitions. [2022-03-01 17:47:56,382 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 3285 transitions. Word has length 29 [2022-03-01 17:47:56,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:56,382 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 3285 transitions. [2022-03-01 17:47:56,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:56,382 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 3285 transitions. [2022-03-01 17:47:56,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:47:56,384 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:56,384 INFO L514 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] [2022-03-01 17:47:56,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:56,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:56,603 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:56,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:56,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1161339337, now seen corresponding path program 3 times [2022-03-01 17:47:56,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:56,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899060183] [2022-03-01 17:47:56,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:56,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:56,737 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:56,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899060183] [2022-03-01 17:47:56,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899060183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:56,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706153741] [2022-03-01 17:47:56,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:47:56,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:56,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:56,738 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) [2022-03-01 17:47:56,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 17:47:56,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:47:56,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:56,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:47:56,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:57,006 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:57,006 INFO L387 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 17 treesize of output 21 [2022-03-01 17:47:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:57,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:57,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:57,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706153741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:57,305 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:57,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-01 17:47:57,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135238781] [2022-03-01 17:47:57,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:57,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:47:57,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:57,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:47:57,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:47:57,306 INFO L87 Difference]: Start difference. First operand 842 states and 3285 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:57,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:57,725 INFO L93 Difference]: Finished difference Result 1188 states and 4549 transitions. [2022-03-01 17:47:57,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:47:57,725 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:47:57,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:57,731 INFO L225 Difference]: With dead ends: 1188 [2022-03-01 17:47:57,731 INFO L226 Difference]: Without dead ends: 1169 [2022-03-01 17:47:57,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:47:57,731 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 198 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:57,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 330 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:47:57,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-03-01 17:47:57,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 850. [2022-03-01 17:47:57,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.895170789163722) internal successors, (3307), 849 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) [2022-03-01 17:47:57,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 3307 transitions. [2022-03-01 17:47:57,765 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 3307 transitions. Word has length 29 [2022-03-01 17:47:57,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:57,765 INFO L470 AbstractCegarLoop]: Abstraction has 850 states and 3307 transitions. [2022-03-01 17:47:57,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:57,766 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 3307 transitions. [2022-03-01 17:47:57,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:47:57,768 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:57,768 INFO L514 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] [2022-03-01 17:47:57,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:57,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:57,984 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:57,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:57,984 INFO L85 PathProgramCache]: Analyzing trace with hash 790114331, now seen corresponding path program 4 times [2022-03-01 17:47:57,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:57,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158180990] [2022-03-01 17:47:57,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:58,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:58,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:58,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158180990] [2022-03-01 17:47:58,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158180990] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:58,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851259775] [2022-03-01 17:47:58,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:47:58,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:58,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:58,104 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) [2022-03-01 17:47:58,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 17:47:58,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:47:58,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:47:58,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:47:58,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:47:58,346 INFO L387 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 19 treesize of output 11 [2022-03-01 17:47:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:58,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:47:58,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:47:58,587 INFO L387 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 17 treesize of output 22 [2022-03-01 17:47:58,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:47:58,602 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:47:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:58,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851259775] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:47:58,652 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:47:58,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:47:58,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856747503] [2022-03-01 17:47:58,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:47:58,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:47:58,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:47:58,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:47:58,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:47:58,653 INFO L87 Difference]: Start difference. First operand 850 states and 3307 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:59,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:47:59,579 INFO L93 Difference]: Finished difference Result 1755 states and 6735 transitions. [2022-03-01 17:47:59,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:47:59,579 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:47:59,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:47:59,588 INFO L225 Difference]: With dead ends: 1755 [2022-03-01 17:47:59,588 INFO L226 Difference]: Without dead ends: 1727 [2022-03-01 17:47:59,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:47:59,589 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 316 mSDsluCounter, 1369 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:47:59,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 540 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1811 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:47:59,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2022-03-01 17:47:59,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 963. [2022-03-01 17:47:59,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 4.016632016632016) internal successors, (3864), 962 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:59,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3864 transitions. [2022-03-01 17:47:59,618 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3864 transitions. Word has length 29 [2022-03-01 17:47:59,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:47:59,619 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 3864 transitions. [2022-03-01 17:47:59,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:47:59,619 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3864 transitions. [2022-03-01 17:47:59,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:47:59,621 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:47:59,621 INFO L514 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] [2022-03-01 17:47:59,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-01 17:47:59,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-01 17:47:59,836 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:47:59,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:47:59,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2099674321, now seen corresponding path program 5 times [2022-03-01 17:47:59,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:47:59,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948863706] [2022-03-01 17:47:59,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:47:59,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:47:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:47:59,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:47:59,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:47:59,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948863706] [2022-03-01 17:47:59,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948863706] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:47:59,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201025097] [2022-03-01 17:47:59,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:47:59,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:47:59,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:47:59,960 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) [2022-03-01 17:47:59,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 17:48:00,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:00,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:00,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:48:00,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:00,224 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2022-03-01 17:48:00,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:00,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:00,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:00,488 INFO L387 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 17 treesize of output 22 [2022-03-01 17:48:00,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:00,500 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:48:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:00,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201025097] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:00,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:00,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 22 [2022-03-01 17:48:00,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071793316] [2022-03-01 17:48:00,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:00,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:48:00,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:00,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:48:00,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:48:00,551 INFO L87 Difference]: Start difference. First operand 963 states and 3864 transitions. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:02,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:02,185 INFO L93 Difference]: Finished difference Result 2261 states and 8768 transitions. [2022-03-01 17:48:02,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 17:48:02,185 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:02,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:02,196 INFO L225 Difference]: With dead ends: 2261 [2022-03-01 17:48:02,196 INFO L226 Difference]: Without dead ends: 2188 [2022-03-01 17:48:02,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=340, Invalid=2312, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 17:48:02,198 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 517 mSDsluCounter, 1895 mSDsCounter, 0 mSdLazyCounter, 2541 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 2635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:02,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 742 Invalid, 2635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2541 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-01 17:48:02,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2022-03-01 17:48:02,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 947. [2022-03-01 17:48:02,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 4.028541226215645) internal successors, (3811), 946 states have internal predecessors, (3811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:02,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3811 transitions. [2022-03-01 17:48:02,225 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3811 transitions. Word has length 29 [2022-03-01 17:48:02,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:02,225 INFO L470 AbstractCegarLoop]: Abstraction has 947 states and 3811 transitions. [2022-03-01 17:48:02,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 22 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:02,225 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3811 transitions. [2022-03-01 17:48:02,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:02,228 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:02,228 INFO L514 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] [2022-03-01 17:48:02,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-01 17:48:02,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:02,447 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:02,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:02,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1181516803, now seen corresponding path program 6 times [2022-03-01 17:48:02,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:02,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012796148] [2022-03-01 17:48:02,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:02,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:02,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:02,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:02,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012796148] [2022-03-01 17:48:02,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012796148] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:02,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119428921] [2022-03-01 17:48:02,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:48:02,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:02,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:02,579 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) [2022-03-01 17:48:02,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 17:48:02,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:48:02,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:02,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 17:48:02,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:02,700 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:02,701 INFO L387 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 [2022-03-01 17:48:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:02,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:02,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119428921] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:02,995 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:02,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-03-01 17:48:02,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914686428] [2022-03-01 17:48:02,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:02,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:48:02,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:02,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:48:02,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:48:02,996 INFO L87 Difference]: Start difference. First operand 947 states and 3811 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) [2022-03-01 17:48:03,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:03,382 INFO L93 Difference]: Finished difference Result 1340 states and 5308 transitions. [2022-03-01 17:48:03,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:48:03,382 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 [2022-03-01 17:48:03,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:03,389 INFO L225 Difference]: With dead ends: 1340 [2022-03-01 17:48:03,389 INFO L226 Difference]: Without dead ends: 1321 [2022-03-01 17:48:03,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:48:03,390 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 234 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:03,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 194 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:48:03,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2022-03-01 17:48:03,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1034. [2022-03-01 17:48:03,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 4.078412391093901) internal successors, (4213), 1033 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:03,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 4213 transitions. [2022-03-01 17:48:03,413 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 4213 transitions. Word has length 29 [2022-03-01 17:48:03,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:03,413 INFO L470 AbstractCegarLoop]: Abstraction has 1034 states and 4213 transitions. [2022-03-01 17:48:03,413 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) [2022-03-01 17:48:03,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 4213 transitions. [2022-03-01 17:48:03,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:03,415 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:03,415 INFO L514 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] [2022-03-01 17:48:03,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:03,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:03,632 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:03,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:03,632 INFO L85 PathProgramCache]: Analyzing trace with hash 121755803, now seen corresponding path program 7 times [2022-03-01 17:48:03,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:03,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415016615] [2022-03-01 17:48:03,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:03,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:03,754 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:03,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415016615] [2022-03-01 17:48:03,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415016615] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:03,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757877829] [2022-03-01 17:48:03,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:48:03,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:03,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:03,759 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) [2022-03-01 17:48:03,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 17:48:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:03,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:03,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:03,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:48:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:04,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:04,239 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:04,239 INFO L387 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 17 treesize of output 22 [2022-03-01 17:48:04,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:04,249 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:48:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:04,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757877829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:04,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:04,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:48:04,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442178449] [2022-03-01 17:48:04,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:04,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:48:04,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:04,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:48:04,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:48:04,297 INFO L87 Difference]: Start difference. First operand 1034 states and 4213 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:05,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:05,067 INFO L93 Difference]: Finished difference Result 1788 states and 6981 transitions. [2022-03-01 17:48:05,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:48:05,067 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:05,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:05,073 INFO L225 Difference]: With dead ends: 1788 [2022-03-01 17:48:05,073 INFO L226 Difference]: Without dead ends: 1760 [2022-03-01 17:48:05,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:48:05,074 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 351 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 1580 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:05,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 455 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1580 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:48:05,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2022-03-01 17:48:05,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1124. [2022-03-01 17:48:05,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1123 states have (on average 4.140694568121104) internal successors, (4650), 1123 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:05,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 4650 transitions. [2022-03-01 17:48:05,099 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 4650 transitions. Word has length 29 [2022-03-01 17:48:05,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:05,099 INFO L470 AbstractCegarLoop]: Abstraction has 1124 states and 4650 transitions. [2022-03-01 17:48:05,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:05,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 4650 transitions. [2022-03-01 17:48:05,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:05,102 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:05,102 INFO L514 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] [2022-03-01 17:48:05,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:05,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-01 17:48:05,318 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:05,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:05,319 INFO L85 PathProgramCache]: Analyzing trace with hash 68369283, now seen corresponding path program 8 times [2022-03-01 17:48:05,319 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:05,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569564084] [2022-03-01 17:48:05,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:05,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:05,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:05,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569564084] [2022-03-01 17:48:05,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569564084] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:05,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226797090] [2022-03-01 17:48:05,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:48:05,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:05,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:05,456 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) [2022-03-01 17:48:05,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 17:48:05,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:05,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:05,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:05,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:05,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:05,631 INFO L387 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 [2022-03-01 17:48:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:05,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:05,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226797090] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:05,975 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:05,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-03-01 17:48:05,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14694818] [2022-03-01 17:48:05,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:05,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:48:05,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:05,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:48:05,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:48:05,976 INFO L87 Difference]: Start difference. First operand 1124 states and 4650 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:06,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:06,496 INFO L93 Difference]: Finished difference Result 1434 states and 5758 transitions. [2022-03-01 17:48:06,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:48:06,496 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:06,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:06,500 INFO L225 Difference]: With dead ends: 1434 [2022-03-01 17:48:06,500 INFO L226 Difference]: Without dead ends: 1411 [2022-03-01 17:48:06,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:48:06,501 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 229 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:06,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 282 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:48:06,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2022-03-01 17:48:06,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1084. [2022-03-01 17:48:06,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 4.1320406278855035) internal successors, (4475), 1083 states have internal predecessors, (4475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:06,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 4475 transitions. [2022-03-01 17:48:06,521 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 4475 transitions. Word has length 29 [2022-03-01 17:48:06,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:06,521 INFO L470 AbstractCegarLoop]: Abstraction has 1084 states and 4475 transitions. [2022-03-01 17:48:06,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:06,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 4475 transitions. [2022-03-01 17:48:06,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:06,524 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:06,524 INFO L514 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] [2022-03-01 17:48:06,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:06,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-01 17:48:06,740 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:06,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:06,740 INFO L85 PathProgramCache]: Analyzing trace with hash 2131198379, now seen corresponding path program 9 times [2022-03-01 17:48:06,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:06,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951783957] [2022-03-01 17:48:06,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:06,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:06,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:06,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951783957] [2022-03-01 17:48:06,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951783957] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:06,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390131802] [2022-03-01 17:48:06,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:48:06,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:06,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:06,887 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) [2022-03-01 17:48:06,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 17:48:06,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:48:06,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:06,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 17:48:06,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:07,030 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:07,031 INFO L387 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 [2022-03-01 17:48:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:07,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:07,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:07,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390131802] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:07,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:07,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-03-01 17:48:07,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813087692] [2022-03-01 17:48:07,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:07,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:48:07,388 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:07,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:48:07,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:48:07,394 INFO L87 Difference]: Start difference. First operand 1084 states and 4475 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:07,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:07,774 INFO L93 Difference]: Finished difference Result 1290 states and 5264 transitions. [2022-03-01 17:48:07,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:48:07,774 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:07,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:07,778 INFO L225 Difference]: With dead ends: 1290 [2022-03-01 17:48:07,778 INFO L226 Difference]: Without dead ends: 1275 [2022-03-01 17:48:07,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:48:07,781 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 86 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:07,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 315 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:48:07,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-03-01 17:48:07,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1090. [2022-03-01 17:48:07,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 1089 states have (on average 4.124885215794307) internal successors, (4492), 1089 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:07,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 4492 transitions. [2022-03-01 17:48:07,836 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 4492 transitions. Word has length 29 [2022-03-01 17:48:07,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:07,836 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 4492 transitions. [2022-03-01 17:48:07,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:07,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 4492 transitions. [2022-03-01 17:48:07,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:07,842 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:07,842 INFO L514 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] [2022-03-01 17:48:07,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:08,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-01 17:48:08,058 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:08,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:08,058 INFO L85 PathProgramCache]: Analyzing trace with hash -79176119, now seen corresponding path program 10 times [2022-03-01 17:48:08,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:08,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730364256] [2022-03-01 17:48:08,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:08,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:08,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:08,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:08,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730364256] [2022-03-01 17:48:08,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730364256] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:08,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117222960] [2022-03-01 17:48:08,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:48:08,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:08,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:08,164 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) [2022-03-01 17:48:08,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 17:48:08,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:48:08,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:08,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:08,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:08,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:48:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:08,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:08,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:08,594 INFO L387 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 17 treesize of output 22 [2022-03-01 17:48:08,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:08,602 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:48:08,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:08,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117222960] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:08,636 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:08,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:48:08,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387799135] [2022-03-01 17:48:08,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:08,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:48:08,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:08,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:48:08,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:48:08,637 INFO L87 Difference]: Start difference. First operand 1090 states and 4492 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:09,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:09,241 INFO L93 Difference]: Finished difference Result 1640 states and 6539 transitions. [2022-03-01 17:48:09,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:48:09,241 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:09,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:09,246 INFO L225 Difference]: With dead ends: 1640 [2022-03-01 17:48:09,246 INFO L226 Difference]: Without dead ends: 1616 [2022-03-01 17:48:09,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:48:09,247 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 338 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:09,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 424 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:48:09,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2022-03-01 17:48:09,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1094. [2022-03-01 17:48:09,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 4.12259835315645) internal successors, (4506), 1093 states have internal predecessors, (4506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:09,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 4506 transitions. [2022-03-01 17:48:09,269 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 4506 transitions. Word has length 29 [2022-03-01 17:48:09,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:09,270 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 4506 transitions. [2022-03-01 17:48:09,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:09,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 4506 transitions. [2022-03-01 17:48:09,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:09,272 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:09,272 INFO L514 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] [2022-03-01 17:48:09,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:09,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-01 17:48:09,488 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:09,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:09,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1082425977, now seen corresponding path program 11 times [2022-03-01 17:48:09,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:09,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735694488] [2022-03-01 17:48:09,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:09,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:09,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:09,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735694488] [2022-03-01 17:48:09,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735694488] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:09,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844249728] [2022-03-01 17:48:09,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:48:09,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:09,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:09,605 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) [2022-03-01 17:48:09,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 17:48:09,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:48:09,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:09,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:48:09,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:09,811 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-03-01 17:48:09,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:09,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:10,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:10,133 INFO L387 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 17 treesize of output 22 [2022-03-01 17:48:10,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:10,144 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:48:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:10,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844249728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:10,199 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:10,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 21 [2022-03-01 17:48:10,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525335330] [2022-03-01 17:48:10,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:10,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:48:10,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:10,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:48:10,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:48:10,201 INFO L87 Difference]: Start difference. First operand 1094 states and 4506 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:11,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:11,158 INFO L93 Difference]: Finished difference Result 2131 states and 8371 transitions. [2022-03-01 17:48:11,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:48:11,158 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:11,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:11,164 INFO L225 Difference]: With dead ends: 2131 [2022-03-01 17:48:11,164 INFO L226 Difference]: Without dead ends: 2093 [2022-03-01 17:48:11,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:48:11,166 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 504 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 1771 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:11,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 512 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1771 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:48:11,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2022-03-01 17:48:11,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 1262. [2022-03-01 17:48:11,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 4.207771609833466) internal successors, (5306), 1261 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:11,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 5306 transitions. [2022-03-01 17:48:11,195 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 5306 transitions. Word has length 29 [2022-03-01 17:48:11,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:11,195 INFO L470 AbstractCegarLoop]: Abstraction has 1262 states and 5306 transitions. [2022-03-01 17:48:11,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:11,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 5306 transitions. [2022-03-01 17:48:11,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:11,200 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:11,200 INFO L514 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] [2022-03-01 17:48:11,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:11,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-01 17:48:11,422 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:11,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:11,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1909268713, now seen corresponding path program 12 times [2022-03-01 17:48:11,422 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:11,422 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832811500] [2022-03-01 17:48:11,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:11,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:11,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:11,549 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:11,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832811500] [2022-03-01 17:48:11,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832811500] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:11,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180018052] [2022-03-01 17:48:11,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:48:11,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:11,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:11,550 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) [2022-03-01 17:48:11,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 17:48:11,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:48:11,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:11,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 17:48:11,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:11,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:11,658 INFO L387 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 [2022-03-01 17:48:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:11,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:11,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:11,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180018052] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:11,928 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:11,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 18 [2022-03-01 17:48:11,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008937569] [2022-03-01 17:48:11,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:11,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:48:11,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:11,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:48:11,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:48:11,932 INFO L87 Difference]: Start difference. First operand 1262 states and 5306 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:12,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:12,190 INFO L93 Difference]: Finished difference Result 1616 states and 6533 transitions. [2022-03-01 17:48:12,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:48:12,191 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:12,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:12,213 INFO L225 Difference]: With dead ends: 1616 [2022-03-01 17:48:12,213 INFO L226 Difference]: Without dead ends: 1603 [2022-03-01 17:48:12,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:48:12,213 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 194 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:12,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 188 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:48:12,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2022-03-01 17:48:12,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1262. [2022-03-01 17:48:12,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 4.205392545598731) internal successors, (5303), 1261 states have internal predecessors, (5303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:12,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 5303 transitions. [2022-03-01 17:48:12,238 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 5303 transitions. Word has length 29 [2022-03-01 17:48:12,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:12,238 INFO L470 AbstractCegarLoop]: Abstraction has 1262 states and 5303 transitions. [2022-03-01 17:48:12,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:12,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 5303 transitions. [2022-03-01 17:48:12,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:12,241 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:12,241 INFO L514 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] [2022-03-01 17:48:12,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-01 17:48:12,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-01 17:48:12,454 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:12,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:12,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1486336511, now seen corresponding path program 13 times [2022-03-01 17:48:12,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:12,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197195690] [2022-03-01 17:48:12,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:12,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:12,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:12,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197195690] [2022-03-01 17:48:12,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197195690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:12,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521778783] [2022-03-01 17:48:12,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:48:12,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:12,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:12,578 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) [2022-03-01 17:48:12,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 17:48:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:12,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:12,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:12,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:48:12,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:12,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:12,995 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:12,996 INFO L387 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 17 treesize of output 22 [2022-03-01 17:48:13,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:13,005 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:48:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:13,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521778783] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:13,052 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:13,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 17:48:13,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181746328] [2022-03-01 17:48:13,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:13,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:48:13,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:13,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:48:13,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:48:13,053 INFO L87 Difference]: Start difference. First operand 1262 states and 5303 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:13,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:13,962 INFO L93 Difference]: Finished difference Result 2003 states and 7967 transitions. [2022-03-01 17:48:13,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:48:13,963 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:13,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:13,984 INFO L225 Difference]: With dead ends: 2003 [2022-03-01 17:48:13,984 INFO L226 Difference]: Without dead ends: 1957 [2022-03-01 17:48:13,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:48:13,986 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 412 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 1417 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:13,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 420 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1417 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:48:13,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2022-03-01 17:48:14,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1229. [2022-03-01 17:48:14,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 4.19299674267101) internal successors, (5149), 1228 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:14,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 5149 transitions. [2022-03-01 17:48:14,013 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 5149 transitions. Word has length 29 [2022-03-01 17:48:14,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:14,013 INFO L470 AbstractCegarLoop]: Abstraction has 1229 states and 5149 transitions. [2022-03-01 17:48:14,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:14,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 5149 transitions. [2022-03-01 17:48:14,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:14,015 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:14,016 INFO L514 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] [2022-03-01 17:48:14,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:14,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:14,231 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:14,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:14,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1601658297, now seen corresponding path program 14 times [2022-03-01 17:48:14,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:14,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450330225] [2022-03-01 17:48:14,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:14,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:14,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:14,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:14,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450330225] [2022-03-01 17:48:14,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450330225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:14,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614942091] [2022-03-01 17:48:14,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:48:14,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:14,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:14,361 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) [2022-03-01 17:48:14,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 17:48:14,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:14,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:14,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:14,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:14,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:14,558 INFO L387 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 [2022-03-01 17:48:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:14,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:14,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614942091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:14,959 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:14,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-01 17:48:14,959 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822440419] [2022-03-01 17:48:14,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:14,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:48:14,959 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:14,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:48:14,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:48:14,960 INFO L87 Difference]: Start difference. First operand 1229 states and 5149 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:15,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:15,494 INFO L93 Difference]: Finished difference Result 1449 states and 5983 transitions. [2022-03-01 17:48:15,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:48:15,494 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:15,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:15,498 INFO L225 Difference]: With dead ends: 1449 [2022-03-01 17:48:15,498 INFO L226 Difference]: Without dead ends: 1430 [2022-03-01 17:48:15,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:48:15,499 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 130 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:15,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 301 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:48:15,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2022-03-01 17:48:15,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1214. [2022-03-01 17:48:15,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 4.196207749381698) internal successors, (5090), 1213 states have internal predecessors, (5090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:15,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 5090 transitions. [2022-03-01 17:48:15,521 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 5090 transitions. Word has length 29 [2022-03-01 17:48:15,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:15,521 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 5090 transitions. [2022-03-01 17:48:15,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:15,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 5090 transitions. [2022-03-01 17:48:15,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:15,524 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:15,524 INFO L514 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] [2022-03-01 17:48:15,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:15,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:15,740 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:15,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:15,741 INFO L85 PathProgramCache]: Analyzing trace with hash -801130063, now seen corresponding path program 1 times [2022-03-01 17:48:15,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:15,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18023183] [2022-03-01 17:48:15,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:15,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:15,863 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:15,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18023183] [2022-03-01 17:48:15,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18023183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:15,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768199016] [2022-03-01 17:48:15,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:15,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:15,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:15,865 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) [2022-03-01 17:48:15,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 17:48:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:15,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:15,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:16,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:48:16,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:16,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:16,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:16,281 INFO L387 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 17 treesize of output 22 [2022-03-01 17:48:16,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:16,291 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:48:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:16,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768199016] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:16,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:16,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 17:48:16,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145464495] [2022-03-01 17:48:16,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:16,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:48:16,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:16,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:48:16,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:48:16,340 INFO L87 Difference]: Start difference. First operand 1214 states and 5090 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:17,313 INFO L93 Difference]: Finished difference Result 2164 states and 8762 transitions. [2022-03-01 17:48:17,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:48:17,313 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:17,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:17,319 INFO L225 Difference]: With dead ends: 2164 [2022-03-01 17:48:17,319 INFO L226 Difference]: Without dead ends: 2126 [2022-03-01 17:48:17,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=258, Invalid=1148, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:48:17,320 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 437 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:17,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 425 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1453 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:48:17,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2022-03-01 17:48:17,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1426. [2022-03-01 17:48:17,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 4.269473684210526) internal successors, (6084), 1425 states have internal predecessors, (6084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:17,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 6084 transitions. [2022-03-01 17:48:17,356 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 6084 transitions. Word has length 29 [2022-03-01 17:48:17,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:17,357 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 6084 transitions. [2022-03-01 17:48:17,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:17,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 6084 transitions. [2022-03-01 17:48:17,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:17,361 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:17,361 INFO L514 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] [2022-03-01 17:48:17,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:17,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:17,578 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:17,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:17,578 INFO L85 PathProgramCache]: Analyzing trace with hash 621224763, now seen corresponding path program 2 times [2022-03-01 17:48:17,578 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:17,578 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992705572] [2022-03-01 17:48:17,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:17,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:17,678 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:17,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992705572] [2022-03-01 17:48:17,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992705572] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:17,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121142222] [2022-03-01 17:48:17,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:48:17,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:17,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:17,688 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) [2022-03-01 17:48:17,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 17:48:17,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:17,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:17,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:17,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:17,878 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:17,879 INFO L387 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 [2022-03-01 17:48:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:18,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:18,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:18,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121142222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:18,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:18,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-03-01 17:48:18,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142270211] [2022-03-01 17:48:18,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:18,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:48:18,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:18,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:48:18,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:48:18,272 INFO L87 Difference]: Start difference. First operand 1426 states and 6084 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:18,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:18,989 INFO L93 Difference]: Finished difference Result 1744 states and 7265 transitions. [2022-03-01 17:48:18,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:48:18,989 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:18,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:18,993 INFO L225 Difference]: With dead ends: 1744 [2022-03-01 17:48:18,993 INFO L226 Difference]: Without dead ends: 1731 [2022-03-01 17:48:18,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:48:18,995 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 174 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:18,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 376 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:48:18,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2022-03-01 17:48:19,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1426. [2022-03-01 17:48:19,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 4.267368421052631) internal successors, (6081), 1425 states have internal predecessors, (6081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:19,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 6081 transitions. [2022-03-01 17:48:19,024 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 6081 transitions. Word has length 29 [2022-03-01 17:48:19,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:19,024 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 6081 transitions. [2022-03-01 17:48:19,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:19,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 6081 transitions. [2022-03-01 17:48:19,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:19,027 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:19,027 INFO L514 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] [2022-03-01 17:48:19,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:19,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:19,244 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:19,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:19,244 INFO L85 PathProgramCache]: Analyzing trace with hash 176122743, now seen corresponding path program 3 times [2022-03-01 17:48:19,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:19,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302067268] [2022-03-01 17:48:19,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:19,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:19,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:19,401 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:19,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302067268] [2022-03-01 17:48:19,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302067268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:19,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409593057] [2022-03-01 17:48:19,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:48:19,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:19,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:19,403 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) [2022-03-01 17:48:19,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 17:48:19,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:48:19,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:19,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 17:48:19,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:19,521 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:19,521 INFO L387 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 [2022-03-01 17:48:19,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:19,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:19,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409593057] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:19,846 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:19,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-03-01 17:48:19,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571733801] [2022-03-01 17:48:19,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:19,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:48:19,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:19,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:48:19,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:48:19,847 INFO L87 Difference]: Start difference. First operand 1426 states and 6081 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) [2022-03-01 17:48:20,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:20,281 INFO L93 Difference]: Finished difference Result 1768 states and 7335 transitions. [2022-03-01 17:48:20,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:48:20,281 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 [2022-03-01 17:48:20,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:20,285 INFO L225 Difference]: With dead ends: 1768 [2022-03-01 17:48:20,286 INFO L226 Difference]: Without dead ends: 1740 [2022-03-01 17:48:20,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:48:20,287 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 188 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:20,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 240 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:48:20,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2022-03-01 17:48:20,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1383. [2022-03-01 17:48:20,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 4.2691751085383505) internal successors, (5900), 1382 states have internal predecessors, (5900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:20,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 5900 transitions. [2022-03-01 17:48:20,331 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 5900 transitions. Word has length 29 [2022-03-01 17:48:20,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:20,335 INFO L470 AbstractCegarLoop]: Abstraction has 1383 states and 5900 transitions. [2022-03-01 17:48:20,335 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) [2022-03-01 17:48:20,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 5900 transitions. [2022-03-01 17:48:20,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:20,338 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:20,338 INFO L514 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] [2022-03-01 17:48:20,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:20,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:20,551 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:20,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:20,552 INFO L85 PathProgramCache]: Analyzing trace with hash 660102987, now seen corresponding path program 4 times [2022-03-01 17:48:20,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:20,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516674424] [2022-03-01 17:48:20,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:20,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:20,661 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:20,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516674424] [2022-03-01 17:48:20,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516674424] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:20,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758963395] [2022-03-01 17:48:20,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:48:20,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:20,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:20,663 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) [2022-03-01 17:48:20,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 17:48:20,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:48:20,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:20,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:20,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:20,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:48:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:20,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:20,998 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:20,998 INFO L387 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 17 treesize of output 22 [2022-03-01 17:48:21,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:21,009 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:48:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:21,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758963395] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:21,051 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:21,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-01 17:48:21,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091617414] [2022-03-01 17:48:21,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:21,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:48:21,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:21,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:48:21,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:48:21,052 INFO L87 Difference]: Start difference. First operand 1383 states and 5900 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:21,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:21,873 INFO L93 Difference]: Finished difference Result 2052 states and 8368 transitions. [2022-03-01 17:48:21,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:48:21,874 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:21,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:21,878 INFO L225 Difference]: With dead ends: 2052 [2022-03-01 17:48:21,878 INFO L226 Difference]: Without dead ends: 2003 [2022-03-01 17:48:21,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=1433, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:48:21,879 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 394 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:21,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 495 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:48:21,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2022-03-01 17:48:21,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1377. [2022-03-01 17:48:21,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1377 states, 1376 states have (on average 4.2688953488372094) internal successors, (5874), 1376 states have internal predecessors, (5874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:21,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 5874 transitions. [2022-03-01 17:48:21,931 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 5874 transitions. Word has length 29 [2022-03-01 17:48:21,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:21,931 INFO L470 AbstractCegarLoop]: Abstraction has 1377 states and 5874 transitions. [2022-03-01 17:48:21,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:21,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 5874 transitions. [2022-03-01 17:48:21,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:21,934 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:21,934 INFO L514 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] [2022-03-01 17:48:21,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:22,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:22,147 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:22,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:22,148 INFO L85 PathProgramCache]: Analyzing trace with hash -703947667, now seen corresponding path program 5 times [2022-03-01 17:48:22,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:22,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430111677] [2022-03-01 17:48:22,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:22,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:22,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:22,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430111677] [2022-03-01 17:48:22,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430111677] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:22,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900935779] [2022-03-01 17:48:22,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:48:22,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:22,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:22,287 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) [2022-03-01 17:48:22,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 17:48:22,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:48:22,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:22,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:48:22,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:22,456 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-03-01 17:48:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:22,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:22,713 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:22,713 INFO L387 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 17 treesize of output 22 [2022-03-01 17:48:22,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:22,723 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:48:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:22,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900935779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:22,793 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:22,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 21 [2022-03-01 17:48:22,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228268765] [2022-03-01 17:48:22,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:22,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:48:22,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:22,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:48:22,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:48:22,794 INFO L87 Difference]: Start difference. First operand 1377 states and 5874 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:23,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:23,960 INFO L93 Difference]: Finished difference Result 2556 states and 10250 transitions. [2022-03-01 17:48:23,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:48:23,960 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:23,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:23,966 INFO L225 Difference]: With dead ends: 2556 [2022-03-01 17:48:23,966 INFO L226 Difference]: Without dead ends: 2518 [2022-03-01 17:48:23,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:48:23,967 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 538 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:23,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 503 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 17:48:23,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2022-03-01 17:48:23,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 1503. [2022-03-01 17:48:23,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 4.2982689747004) internal successors, (6456), 1502 states have internal predecessors, (6456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:24,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 6456 transitions. [2022-03-01 17:48:24,001 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 6456 transitions. Word has length 29 [2022-03-01 17:48:24,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:24,001 INFO L470 AbstractCegarLoop]: Abstraction has 1503 states and 6456 transitions. [2022-03-01 17:48:24,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:24,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 6456 transitions. [2022-03-01 17:48:24,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:24,004 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:24,004 INFO L514 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] [2022-03-01 17:48:24,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:24,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-01 17:48:24,208 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:24,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:24,208 INFO L85 PathProgramCache]: Analyzing trace with hash 718407159, now seen corresponding path program 6 times [2022-03-01 17:48:24,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:24,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009029770] [2022-03-01 17:48:24,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:24,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:24,348 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:24,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009029770] [2022-03-01 17:48:24,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009029770] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:24,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834072180] [2022-03-01 17:48:24,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:48:24,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:24,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:24,349 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) [2022-03-01 17:48:24,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 17:48:24,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:48:24,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:24,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 17:48:24,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:24,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:24,452 INFO L387 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 [2022-03-01 17:48:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:24,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:24,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834072180] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:24,704 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:24,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 18 [2022-03-01 17:48:24,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293016338] [2022-03-01 17:48:24,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:24,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:48:24,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:24,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:48:24,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:48:24,706 INFO L87 Difference]: Start difference. First operand 1503 states and 6456 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:25,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:25,066 INFO L93 Difference]: Finished difference Result 1897 states and 7821 transitions. [2022-03-01 17:48:25,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:48:25,066 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:25,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:25,071 INFO L225 Difference]: With dead ends: 1897 [2022-03-01 17:48:25,071 INFO L226 Difference]: Without dead ends: 1884 [2022-03-01 17:48:25,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:48:25,072 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 128 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:25,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 285 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:48:25,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2022-03-01 17:48:25,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1503. [2022-03-01 17:48:25,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 4.296271637816245) internal successors, (6453), 1502 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:25,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 6453 transitions. [2022-03-01 17:48:25,128 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 6453 transitions. Word has length 29 [2022-03-01 17:48:25,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:25,128 INFO L470 AbstractCegarLoop]: Abstraction has 1503 states and 6453 transitions. [2022-03-01 17:48:25,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:25,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 6453 transitions. [2022-03-01 17:48:25,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:25,131 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:25,131 INFO L514 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] [2022-03-01 17:48:25,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:25,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-01 17:48:25,362 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:25,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:25,363 INFO L85 PathProgramCache]: Analyzing trace with hash 273305139, now seen corresponding path program 7 times [2022-03-01 17:48:25,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:25,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385302453] [2022-03-01 17:48:25,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:25,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:25,473 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:25,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385302453] [2022-03-01 17:48:25,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385302453] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:25,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488276495] [2022-03-01 17:48:25,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:48:25,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:25,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:25,474 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) [2022-03-01 17:48:25,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 17:48:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:25,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:25,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:25,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:48:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:25,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:25,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:25,839 INFO L387 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 17 treesize of output 22 [2022-03-01 17:48:25,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:25,848 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:48:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:25,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488276495] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:25,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:25,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 17:48:25,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894145602] [2022-03-01 17:48:25,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:25,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:48:25,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:25,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:48:25,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:48:25,890 INFO L87 Difference]: Start difference. First operand 1503 states and 6453 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:26,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:26,782 INFO L93 Difference]: Finished difference Result 2408 states and 9776 transitions. [2022-03-01 17:48:26,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:48:26,782 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:26,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:26,787 INFO L225 Difference]: With dead ends: 2408 [2022-03-01 17:48:26,787 INFO L226 Difference]: Without dead ends: 2362 [2022-03-01 17:48:26,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:48:26,788 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 475 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 1525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:26,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 442 Invalid, 1525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:48:26,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2022-03-01 17:48:26,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 1463. [2022-03-01 17:48:26,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 4.292065663474692) internal successors, (6275), 1462 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:26,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 6275 transitions. [2022-03-01 17:48:26,815 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 6275 transitions. Word has length 29 [2022-03-01 17:48:26,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:26,815 INFO L470 AbstractCegarLoop]: Abstraction has 1463 states and 6275 transitions. [2022-03-01 17:48:26,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:26,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 6275 transitions. [2022-03-01 17:48:26,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:26,817 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:26,818 INFO L514 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] [2022-03-01 17:48:26,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:27,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-01 17:48:27,033 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:27,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:27,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1839456173, now seen corresponding path program 8 times [2022-03-01 17:48:27,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:27,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932075116] [2022-03-01 17:48:27,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:27,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:27,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:27,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932075116] [2022-03-01 17:48:27,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932075116] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:27,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076877398] [2022-03-01 17:48:27,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:48:27,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:27,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:27,165 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) [2022-03-01 17:48:27,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 17:48:27,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:27,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:27,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:27,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:27,305 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:27,305 INFO L387 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 [2022-03-01 17:48:27,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:27,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:27,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076877398] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:27,718 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:27,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-01 17:48:27,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454118638] [2022-03-01 17:48:27,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:27,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:48:27,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:27,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:48:27,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:48:27,720 INFO L87 Difference]: Start difference. First operand 1463 states and 6275 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:28,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:28,314 INFO L93 Difference]: Finished difference Result 1689 states and 7120 transitions. [2022-03-01 17:48:28,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:48:28,314 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:28,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:28,318 INFO L225 Difference]: With dead ends: 1689 [2022-03-01 17:48:28,318 INFO L226 Difference]: Without dead ends: 1670 [2022-03-01 17:48:28,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:48:28,319 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 103 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:28,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 387 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:48:28,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2022-03-01 17:48:28,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1472. [2022-03-01 17:48:28,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 4.282121006118287) internal successors, (6299), 1471 states have internal predecessors, (6299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:28,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 6299 transitions. [2022-03-01 17:48:28,343 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 6299 transitions. Word has length 29 [2022-03-01 17:48:28,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:28,343 INFO L470 AbstractCegarLoop]: Abstraction has 1472 states and 6299 transitions. [2022-03-01 17:48:28,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:28,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 6299 transitions. [2022-03-01 17:48:28,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:28,346 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:28,346 INFO L514 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] [2022-03-01 17:48:28,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:28,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:28,562 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:28,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:28,563 INFO L85 PathProgramCache]: Analyzing trace with hash -329809185, now seen corresponding path program 9 times [2022-03-01 17:48:28,563 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:28,563 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976861670] [2022-03-01 17:48:28,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:28,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:28,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:28,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:28,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976861670] [2022-03-01 17:48:28,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976861670] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:28,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394140826] [2022-03-01 17:48:28,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:48:28,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:28,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:28,659 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) [2022-03-01 17:48:28,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 17:48:28,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:48:28,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:28,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 17:48:28,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:28,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:28,780 INFO L387 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 15 treesize of output 19 [2022-03-01 17:48:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:28,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:29,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394140826] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:29,059 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:29,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-03-01 17:48:29,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425655302] [2022-03-01 17:48:29,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:29,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:48:29,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:29,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:48:29,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:48:29,067 INFO L87 Difference]: Start difference. First operand 1472 states and 6299 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:29,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:29,396 INFO L93 Difference]: Finished difference Result 2079 states and 8528 transitions. [2022-03-01 17:48:29,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:48:29,397 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:29,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:29,402 INFO L225 Difference]: With dead ends: 2079 [2022-03-01 17:48:29,402 INFO L226 Difference]: Without dead ends: 2060 [2022-03-01 17:48:29,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:48:29,403 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 254 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:29,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 268 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:48:29,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2022-03-01 17:48:29,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1500. [2022-03-01 17:48:29,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1499 states have (on average 4.280186791194129) internal successors, (6416), 1499 states have internal predecessors, (6416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:29,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 6416 transitions. [2022-03-01 17:48:29,433 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 6416 transitions. Word has length 29 [2022-03-01 17:48:29,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:29,434 INFO L470 AbstractCegarLoop]: Abstraction has 1500 states and 6416 transitions. [2022-03-01 17:48:29,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:29,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 6416 transitions. [2022-03-01 17:48:29,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:29,437 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:29,437 INFO L514 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] [2022-03-01 17:48:29,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:29,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-01 17:48:29,653 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:29,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:29,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1092545641, now seen corresponding path program 10 times [2022-03-01 17:48:29,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:29,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051084750] [2022-03-01 17:48:29,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:29,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:29,754 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:29,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051084750] [2022-03-01 17:48:29,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051084750] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:29,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841988029] [2022-03-01 17:48:29,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:48:29,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:29,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:29,755 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) [2022-03-01 17:48:29,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 17:48:29,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:48:29,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:29,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:29,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:29,949 INFO L387 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 19 treesize of output 11 [2022-03-01 17:48:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:30,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:30,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:30,180 INFO L387 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 17 treesize of output 22 [2022-03-01 17:48:30,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:30,190 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:48:30,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:30,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841988029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:30,238 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:30,238 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:48:30,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126356543] [2022-03-01 17:48:30,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:30,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:48:30,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:30,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:48:30,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:48:30,239 INFO L87 Difference]: Start difference. First operand 1500 states and 6416 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:30,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:30,947 INFO L93 Difference]: Finished difference Result 2826 states and 11385 transitions. [2022-03-01 17:48:30,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:48:30,948 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:30,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:30,954 INFO L225 Difference]: With dead ends: 2826 [2022-03-01 17:48:30,954 INFO L226 Difference]: Without dead ends: 2798 [2022-03-01 17:48:30,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:48:30,954 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 511 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:30,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 403 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:48:30,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2022-03-01 17:48:30,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 1634. [2022-03-01 17:48:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 4.315370483772198) internal successors, (7047), 1633 states have internal predecessors, (7047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:30,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 7047 transitions. [2022-03-01 17:48:30,987 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 7047 transitions. Word has length 29 [2022-03-01 17:48:30,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:30,987 INFO L470 AbstractCegarLoop]: Abstraction has 1634 states and 7047 transitions. [2022-03-01 17:48:30,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:30,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 7047 transitions. [2022-03-01 17:48:30,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:30,990 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:30,990 INFO L514 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] [2022-03-01 17:48:31,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:31,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:31,191 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:31,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:31,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1493419173, now seen corresponding path program 11 times [2022-03-01 17:48:31,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:31,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207124893] [2022-03-01 17:48:31,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:31,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:31,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:31,265 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:31,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207124893] [2022-03-01 17:48:31,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207124893] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:31,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754797698] [2022-03-01 17:48:31,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:48:31,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:31,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:31,266 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) [2022-03-01 17:48:31,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 17:48:31,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:48:31,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:31,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:31,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:31,441 INFO L387 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 19 treesize of output 11 [2022-03-01 17:48:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:31,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:31,674 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:31,675 INFO L387 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 17 treesize of output 22 [2022-03-01 17:48:31,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:31,684 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:48:31,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:31,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754797698] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:31,728 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:31,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:48:31,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544283464] [2022-03-01 17:48:31,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:31,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:48:31,729 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:31,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:48:31,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:48:31,729 INFO L87 Difference]: Start difference. First operand 1634 states and 7047 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:32,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:32,610 INFO L93 Difference]: Finished difference Result 2812 states and 11355 transitions. [2022-03-01 17:48:32,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:48:32,611 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:32,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:32,617 INFO L225 Difference]: With dead ends: 2812 [2022-03-01 17:48:32,617 INFO L226 Difference]: Without dead ends: 2767 [2022-03-01 17:48:32,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:48:32,618 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 344 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 1792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:32,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 562 Invalid, 1792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1765 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:48:32,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2767 states. [2022-03-01 17:48:32,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2767 to 1629. [2022-03-01 17:48:32,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 4.327395577395578) internal successors, (7045), 1628 states have internal predecessors, (7045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:32,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 7045 transitions. [2022-03-01 17:48:32,667 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 7045 transitions. Word has length 29 [2022-03-01 17:48:32,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:32,667 INFO L470 AbstractCegarLoop]: Abstraction has 1629 states and 7045 transitions. [2022-03-01 17:48:32,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:32,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 7045 transitions. [2022-03-01 17:48:32,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:32,670 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:32,670 INFO L514 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] [2022-03-01 17:48:32,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:32,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-01 17:48:32,886 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:32,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:32,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2081372641, now seen corresponding path program 12 times [2022-03-01 17:48:32,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:32,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226893333] [2022-03-01 17:48:32,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:32,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:32,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:32,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:32,984 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:32,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226893333] [2022-03-01 17:48:32,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226893333] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:32,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187201270] [2022-03-01 17:48:32,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:48:32,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:32,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:32,986 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) [2022-03-01 17:48:33,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-01 17:48:33,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:48:33,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:33,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:33,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:33,163 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:33,163 INFO L387 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 [2022-03-01 17:48:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:33,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:33,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187201270] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:33,404 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:33,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-01 17:48:33,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054914594] [2022-03-01 17:48:33,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:33,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:48:33,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:33,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:48:33,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:48:33,405 INFO L87 Difference]: Start difference. First operand 1629 states and 7045 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:33,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:33,789 INFO L93 Difference]: Finished difference Result 1983 states and 8362 transitions. [2022-03-01 17:48:33,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:48:33,789 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:33,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:33,794 INFO L225 Difference]: With dead ends: 1983 [2022-03-01 17:48:33,794 INFO L226 Difference]: Without dead ends: 1964 [2022-03-01 17:48:33,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:48:33,795 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 130 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:33,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 332 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:48:33,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2022-03-01 17:48:33,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1617. [2022-03-01 17:48:33,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 4.3316831683168315) internal successors, (7000), 1616 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:33,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 7000 transitions. [2022-03-01 17:48:33,820 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 7000 transitions. Word has length 29 [2022-03-01 17:48:33,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:33,821 INFO L470 AbstractCegarLoop]: Abstraction has 1617 states and 7000 transitions. [2022-03-01 17:48:33,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:33,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 7000 transitions. [2022-03-01 17:48:33,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:33,824 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:33,824 INFO L514 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] [2022-03-01 17:48:33,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:34,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:34,035 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:34,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:34,035 INFO L85 PathProgramCache]: Analyzing trace with hash 74229341, now seen corresponding path program 13 times [2022-03-01 17:48:34,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:34,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306248361] [2022-03-01 17:48:34,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:34,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:34,142 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:34,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306248361] [2022-03-01 17:48:34,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306248361] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:34,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203745183] [2022-03-01 17:48:34,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:48:34,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:34,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:34,156 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) [2022-03-01 17:48:34,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-01 17:48:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:34,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:34,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:34,454 INFO L387 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 19 treesize of output 11 [2022-03-01 17:48:34,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:34,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:34,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:34,681 INFO L387 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 17 treesize of output 22 [2022-03-01 17:48:34,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:34,693 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:48:34,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:34,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203745183] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:34,746 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:34,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-01 17:48:34,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528225616] [2022-03-01 17:48:34,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:34,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:48:34,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:34,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:48:34,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:48:34,747 INFO L87 Difference]: Start difference. First operand 1617 states and 7000 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:35,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:35,727 INFO L93 Difference]: Finished difference Result 2035 states and 8556 transitions. [2022-03-01 17:48:35,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:48:35,727 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:35,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:35,732 INFO L225 Difference]: With dead ends: 2035 [2022-03-01 17:48:35,732 INFO L226 Difference]: Without dead ends: 2016 [2022-03-01 17:48:35,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:48:35,733 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 345 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:35,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 420 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:48:35,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2022-03-01 17:48:35,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1620. [2022-03-01 17:48:35,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 4.32674490426189) internal successors, (7005), 1619 states have internal predecessors, (7005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:35,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 7005 transitions. [2022-03-01 17:48:35,761 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 7005 transitions. Word has length 29 [2022-03-01 17:48:35,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:35,762 INFO L470 AbstractCegarLoop]: Abstraction has 1620 states and 7005 transitions. [2022-03-01 17:48:35,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:35,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 7005 transitions. [2022-03-01 17:48:35,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:35,765 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:35,765 INFO L514 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] [2022-03-01 17:48:35,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:35,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:35,982 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:35,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:35,982 INFO L85 PathProgramCache]: Analyzing trace with hash 2144591933, now seen corresponding path program 14 times [2022-03-01 17:48:35,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:35,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857850340] [2022-03-01 17:48:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:35,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:36,064 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:36,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857850340] [2022-03-01 17:48:36,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857850340] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:36,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063952734] [2022-03-01 17:48:36,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:48:36,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:36,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:36,065 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) [2022-03-01 17:48:36,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-01 17:48:36,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:36,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:36,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:36,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:36,253 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:36,254 INFO L387 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 17 treesize of output 21 [2022-03-01 17:48:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:36,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:36,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:36,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063952734] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:36,483 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:36,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-01 17:48:36,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045480592] [2022-03-01 17:48:36,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:36,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:48:36,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:36,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:48:36,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:48:36,484 INFO L87 Difference]: Start difference. First operand 1620 states and 7005 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:36,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:36,816 INFO L93 Difference]: Finished difference Result 1952 states and 8242 transitions. [2022-03-01 17:48:36,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:48:36,817 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:36,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:36,821 INFO L225 Difference]: With dead ends: 1952 [2022-03-01 17:48:36,821 INFO L226 Difference]: Without dead ends: 1933 [2022-03-01 17:48:36,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:48:36,822 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 148 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:36,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 272 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:48:36,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2022-03-01 17:48:36,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1617. [2022-03-01 17:48:36,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 4.329207920792079) internal successors, (6996), 1616 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:36,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 6996 transitions. [2022-03-01 17:48:36,852 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 6996 transitions. Word has length 29 [2022-03-01 17:48:36,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:36,853 INFO L470 AbstractCegarLoop]: Abstraction has 1617 states and 6996 transitions. [2022-03-01 17:48:36,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:36,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 6996 transitions. [2022-03-01 17:48:36,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:36,857 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:36,857 INFO L514 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] [2022-03-01 17:48:36,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-01 17:48:37,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:37,063 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:37,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:37,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1194824863, now seen corresponding path program 15 times [2022-03-01 17:48:37,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:37,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180434968] [2022-03-01 17:48:37,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:37,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:37,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:37,157 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:37,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180434968] [2022-03-01 17:48:37,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180434968] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:37,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708858389] [2022-03-01 17:48:37,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:48:37,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:37,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:37,158 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) [2022-03-01 17:48:37,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-01 17:48:37,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:48:37,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:37,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:37,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:37,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:37,340 INFO L387 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 15 treesize of output 19 [2022-03-01 17:48:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:37,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:37,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:37,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708858389] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:37,656 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:37,656 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-01 17:48:37,656 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855471932] [2022-03-01 17:48:37,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:37,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:48:37,656 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:37,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:48:37,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:48:37,657 INFO L87 Difference]: Start difference. First operand 1617 states and 6996 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:38,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:38,167 INFO L93 Difference]: Finished difference Result 2176 states and 9141 transitions. [2022-03-01 17:48:38,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:48:38,167 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:38,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:38,173 INFO L225 Difference]: With dead ends: 2176 [2022-03-01 17:48:38,174 INFO L226 Difference]: Without dead ends: 2157 [2022-03-01 17:48:38,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:48:38,174 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 329 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:38,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 333 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:48:38,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2022-03-01 17:48:38,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1698. [2022-03-01 17:48:38,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 4.342958161461403) internal successors, (7370), 1697 states have internal predecessors, (7370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:38,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 7370 transitions. [2022-03-01 17:48:38,239 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 7370 transitions. Word has length 29 [2022-03-01 17:48:38,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:38,239 INFO L470 AbstractCegarLoop]: Abstraction has 1698 states and 7370 transitions. [2022-03-01 17:48:38,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:38,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 7370 transitions. [2022-03-01 17:48:38,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:38,243 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:38,243 INFO L514 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] [2022-03-01 17:48:38,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:38,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-01 17:48:38,459 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:38,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:38,460 INFO L85 PathProgramCache]: Analyzing trace with hash 108447743, now seen corresponding path program 16 times [2022-03-01 17:48:38,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:38,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286604002] [2022-03-01 17:48:38,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:38,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:38,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:38,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:38,536 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:38,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286604002] [2022-03-01 17:48:38,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286604002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:38,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327820768] [2022-03-01 17:48:38,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:48:38,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:38,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:38,537 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) [2022-03-01 17:48:38,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-01 17:48:38,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:48:38,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:38,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:38,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:38,753 INFO L387 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 19 treesize of output 11 [2022-03-01 17:48:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:38,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:38,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:38,966 INFO L387 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 17 treesize of output 22 [2022-03-01 17:48:38,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:38,975 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:48:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:39,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327820768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:39,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:39,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:48:39,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114130142] [2022-03-01 17:48:39,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:39,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:48:39,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:39,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:48:39,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:48:39,038 INFO L87 Difference]: Start difference. First operand 1698 states and 7370 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:39,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:39,728 INFO L93 Difference]: Finished difference Result 2754 states and 11325 transitions. [2022-03-01 17:48:39,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:48:39,728 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:39,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:39,734 INFO L225 Difference]: With dead ends: 2754 [2022-03-01 17:48:39,735 INFO L226 Difference]: Without dead ends: 2726 [2022-03-01 17:48:39,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:48:39,735 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 381 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:39,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 472 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1548 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:48:39,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2022-03-01 17:48:39,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 1807. [2022-03-01 17:48:39,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1806 states have (on average 4.377630121816169) internal successors, (7906), 1806 states have internal predecessors, (7906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:39,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 7906 transitions. [2022-03-01 17:48:39,771 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 7906 transitions. Word has length 29 [2022-03-01 17:48:39,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:39,771 INFO L470 AbstractCegarLoop]: Abstraction has 1807 states and 7906 transitions. [2022-03-01 17:48:39,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:39,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 7906 transitions. [2022-03-01 17:48:39,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:39,774 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:39,774 INFO L514 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] [2022-03-01 17:48:39,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:39,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-01 17:48:39,983 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:39,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:39,984 INFO L85 PathProgramCache]: Analyzing trace with hash 55061223, now seen corresponding path program 17 times [2022-03-01 17:48:39,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:39,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982976433] [2022-03-01 17:48:39,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:39,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:40,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:40,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982976433] [2022-03-01 17:48:40,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982976433] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:40,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766631652] [2022-03-01 17:48:40,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:48:40,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:40,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:40,122 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) [2022-03-01 17:48:40,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-01 17:48:40,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:40,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:40,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:40,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:40,294 INFO L387 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 19 treesize of output 11 [2022-03-01 17:48:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:40,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:40,501 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:40,501 INFO L387 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 17 treesize of output 22 [2022-03-01 17:48:40,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:40,513 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:48:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:40,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766631652] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:40,580 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:40,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:48:40,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204434103] [2022-03-01 17:48:40,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:40,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:48:40,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:40,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:48:40,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:48:40,582 INFO L87 Difference]: Start difference. First operand 1807 states and 7906 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:41,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:41,421 INFO L93 Difference]: Finished difference Result 2761 states and 11342 transitions. [2022-03-01 17:48:41,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:48:41,422 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:41,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:41,428 INFO L225 Difference]: With dead ends: 2761 [2022-03-01 17:48:41,428 INFO L226 Difference]: Without dead ends: 2728 [2022-03-01 17:48:41,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:48:41,429 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 383 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:41,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 455 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1502 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:48:41,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2022-03-01 17:48:41,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 1767. [2022-03-01 17:48:41,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1767 states, 1766 states have (on average 4.377689694224236) internal successors, (7731), 1766 states have internal predecessors, (7731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:41,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 7731 transitions. [2022-03-01 17:48:41,482 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 7731 transitions. Word has length 29 [2022-03-01 17:48:41,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:41,482 INFO L470 AbstractCegarLoop]: Abstraction has 1767 states and 7731 transitions. [2022-03-01 17:48:41,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:41,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 7731 transitions. [2022-03-01 17:48:41,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:41,485 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:41,485 INFO L514 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] [2022-03-01 17:48:41,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-01 17:48:41,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:41,687 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:41,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:41,687 INFO L85 PathProgramCache]: Analyzing trace with hash 2117890319, now seen corresponding path program 18 times [2022-03-01 17:48:41,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:41,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21962788] [2022-03-01 17:48:41,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:41,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:41,833 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:41,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21962788] [2022-03-01 17:48:41,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21962788] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:41,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724451655] [2022-03-01 17:48:41,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:48:41,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:41,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:41,834 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) [2022-03-01 17:48:41,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-01 17:48:41,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:48:41,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:41,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:41,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:42,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:42,020 INFO L387 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 15 treesize of output 19 [2022-03-01 17:48:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:42,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:42,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:42,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724451655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:42,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:42,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-01 17:48:42,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677333521] [2022-03-01 17:48:42,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:42,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:48:42,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:42,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:48:42,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:48:42,367 INFO L87 Difference]: Start difference. First operand 1767 states and 7731 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:42,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:42,900 INFO L93 Difference]: Finished difference Result 2094 states and 8952 transitions. [2022-03-01 17:48:42,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:48:42,900 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:42,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:42,905 INFO L225 Difference]: With dead ends: 2094 [2022-03-01 17:48:42,906 INFO L226 Difference]: Without dead ends: 2079 [2022-03-01 17:48:42,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:48:42,906 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 144 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:42,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 319 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:48:42,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2022-03-01 17:48:42,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 1755. [2022-03-01 17:48:42,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1754 states have (on average 4.379703534777651) internal successors, (7682), 1754 states have internal predecessors, (7682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:42,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 7682 transitions. [2022-03-01 17:48:42,933 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 7682 transitions. Word has length 29 [2022-03-01 17:48:42,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:42,933 INFO L470 AbstractCegarLoop]: Abstraction has 1755 states and 7682 transitions. [2022-03-01 17:48:42,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:42,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 7682 transitions. [2022-03-01 17:48:42,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:42,936 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:42,936 INFO L514 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] [2022-03-01 17:48:42,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:43,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-01 17:48:43,152 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:43,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:43,152 INFO L85 PathProgramCache]: Analyzing trace with hash -101621211, now seen corresponding path program 19 times [2022-03-01 17:48:43,153 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:43,153 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269986453] [2022-03-01 17:48:43,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:43,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:43,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:43,218 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:43,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269986453] [2022-03-01 17:48:43,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269986453] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:43,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126471451] [2022-03-01 17:48:43,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:48:43,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:43,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:43,219 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) [2022-03-01 17:48:43,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-01 17:48:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:43,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:43,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:43,416 INFO L387 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 19 treesize of output 11 [2022-03-01 17:48:43,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:43,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:43,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:43,610 INFO L387 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 17 treesize of output 22 [2022-03-01 17:48:43,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:43,618 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:48:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:43,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126471451] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:43,664 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:43,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-01 17:48:43,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950523221] [2022-03-01 17:48:43,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:43,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:48:43,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:43,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:48:43,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:48:43,665 INFO L87 Difference]: Start difference. First operand 1755 states and 7682 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:44,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:44,452 INFO L93 Difference]: Finished difference Result 2126 states and 9072 transitions. [2022-03-01 17:48:44,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:48:44,453 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:44,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:44,457 INFO L225 Difference]: With dead ends: 2126 [2022-03-01 17:48:44,458 INFO L226 Difference]: Without dead ends: 2111 [2022-03-01 17:48:44,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:48:44,458 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 252 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 1718 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:44,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 520 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1718 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:48:44,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2022-03-01 17:48:44,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1767. [2022-03-01 17:48:44,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1767 states, 1766 states have (on average 4.36806342015855) internal successors, (7714), 1766 states have internal predecessors, (7714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:44,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 7714 transitions. [2022-03-01 17:48:44,486 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 7714 transitions. Word has length 29 [2022-03-01 17:48:44,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:44,487 INFO L470 AbstractCegarLoop]: Abstraction has 1767 states and 7714 transitions. [2022-03-01 17:48:44,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:44,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 7714 transitions. [2022-03-01 17:48:44,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:44,490 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:44,490 INFO L514 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] [2022-03-01 17:48:44,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:44,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-01 17:48:44,706 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:44,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:44,706 INFO L85 PathProgramCache]: Analyzing trace with hash 332408135, now seen corresponding path program 20 times [2022-03-01 17:48:44,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:44,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907004526] [2022-03-01 17:48:44,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:44,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:44,783 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:44,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907004526] [2022-03-01 17:48:44,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907004526] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:44,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219467026] [2022-03-01 17:48:44,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:48:44,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:44,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:44,785 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) [2022-03-01 17:48:44,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-01 17:48:44,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:44,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:44,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:44,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:44,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:44,980 INFO L387 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 15 treesize of output 19 [2022-03-01 17:48:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:45,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:45,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:45,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219467026] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:45,205 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:45,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-01 17:48:45,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523794098] [2022-03-01 17:48:45,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:45,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:48:45,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:45,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:48:45,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:48:45,206 INFO L87 Difference]: Start difference. First operand 1767 states and 7714 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:45,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:45,684 INFO L93 Difference]: Finished difference Result 2191 states and 9154 transitions. [2022-03-01 17:48:45,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:48:45,684 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:45,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:45,689 INFO L225 Difference]: With dead ends: 2191 [2022-03-01 17:48:45,689 INFO L226 Difference]: Without dead ends: 2176 [2022-03-01 17:48:45,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:48:45,690 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 265 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:45,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 359 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:48:45,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2022-03-01 17:48:45,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1764. [2022-03-01 17:48:45,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 4.3698241633579125) internal successors, (7704), 1763 states have internal predecessors, (7704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:45,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 7704 transitions. [2022-03-01 17:48:45,725 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 7704 transitions. Word has length 29 [2022-03-01 17:48:45,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:45,725 INFO L470 AbstractCegarLoop]: Abstraction has 1764 states and 7704 transitions. [2022-03-01 17:48:45,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:45,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 7704 transitions. [2022-03-01 17:48:45,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:45,729 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:45,729 INFO L514 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] [2022-03-01 17:48:45,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-01 17:48:45,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-01 17:48:45,943 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:45,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:45,944 INFO L85 PathProgramCache]: Analyzing trace with hash 754462757, now seen corresponding path program 21 times [2022-03-01 17:48:45,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:45,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510868268] [2022-03-01 17:48:45,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:45,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:46,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:46,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:46,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510868268] [2022-03-01 17:48:46,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510868268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:46,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146156420] [2022-03-01 17:48:46,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:48:46,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:46,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:46,035 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) [2022-03-01 17:48:46,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-01 17:48:46,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:48:46,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:46,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:46,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:46,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:46,146 INFO L387 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 [2022-03-01 17:48:46,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:46,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:46,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146156420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:46,451 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:46,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-01 17:48:46,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292320983] [2022-03-01 17:48:46,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:46,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:48:46,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:46,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:48:46,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:48:46,454 INFO L87 Difference]: Start difference. First operand 1764 states and 7704 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:47,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:47,045 INFO L93 Difference]: Finished difference Result 2126 states and 9065 transitions. [2022-03-01 17:48:47,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:48:47,045 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:47,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:47,050 INFO L225 Difference]: With dead ends: 2126 [2022-03-01 17:48:47,050 INFO L226 Difference]: Without dead ends: 2107 [2022-03-01 17:48:47,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:48:47,051 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 332 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:47,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 320 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1105 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:48:47,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2022-03-01 17:48:47,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 1794. [2022-03-01 17:48:47,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 4.37590630228667) internal successors, (7846), 1793 states have internal predecessors, (7846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:47,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 7846 transitions. [2022-03-01 17:48:47,081 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 7846 transitions. Word has length 29 [2022-03-01 17:48:47,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:47,081 INFO L470 AbstractCegarLoop]: Abstraction has 1794 states and 7846 transitions. [2022-03-01 17:48:47,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:47,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 7846 transitions. [2022-03-01 17:48:47,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:47,085 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:47,085 INFO L514 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] [2022-03-01 17:48:47,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-01 17:48:47,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:47,300 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:47,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:47,301 INFO L85 PathProgramCache]: Analyzing trace with hash 2057735363, now seen corresponding path program 22 times [2022-03-01 17:48:47,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:47,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226767269] [2022-03-01 17:48:47,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:47,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:47,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:47,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226767269] [2022-03-01 17:48:47,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226767269] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:47,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42378467] [2022-03-01 17:48:47,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:48:47,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:47,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:47,406 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) [2022-03-01 17:48:47,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-01 17:48:47,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:48:47,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:47,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:47,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:47,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:48:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:47,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:47,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:47,822 INFO L387 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 17 treesize of output 22 [2022-03-01 17:48:47,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:47,833 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:48:47,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:47,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42378467] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:47,899 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:47,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:48:47,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825430895] [2022-03-01 17:48:47,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:47,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:48:47,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:47,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:48:47,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:48:47,900 INFO L87 Difference]: Start difference. First operand 1794 states and 7846 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:48,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:48,682 INFO L93 Difference]: Finished difference Result 2562 states and 10721 transitions. [2022-03-01 17:48:48,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:48:48,682 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:48,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:48,688 INFO L225 Difference]: With dead ends: 2562 [2022-03-01 17:48:48,689 INFO L226 Difference]: Without dead ends: 2534 [2022-03-01 17:48:48,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:48:48,691 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 338 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 1434 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:48,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 415 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1434 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:48:48,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2022-03-01 17:48:48,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 1885. [2022-03-01 17:48:48,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 4.397027600849257) internal successors, (8284), 1884 states have internal predecessors, (8284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:48,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 8284 transitions. [2022-03-01 17:48:48,727 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 8284 transitions. Word has length 29 [2022-03-01 17:48:48,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:48,728 INFO L470 AbstractCegarLoop]: Abstraction has 1885 states and 8284 transitions. [2022-03-01 17:48:48,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:48,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 8284 transitions. [2022-03-01 17:48:48,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:48,732 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:48,732 INFO L514 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] [2022-03-01 17:48:48,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:48,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:48,935 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:48,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:48,936 INFO L85 PathProgramCache]: Analyzing trace with hash 2004348843, now seen corresponding path program 23 times [2022-03-01 17:48:48,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:48,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332000962] [2022-03-01 17:48:48,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:48,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:49,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:49,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:49,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332000962] [2022-03-01 17:48:49,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332000962] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:49,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990531563] [2022-03-01 17:48:49,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:48:49,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:49,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:49,013 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) [2022-03-01 17:48:49,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-01 17:48:49,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:49,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:49,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:49,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:49,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:48:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:49,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:49,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:49,461 INFO L387 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 17 treesize of output 22 [2022-03-01 17:48:49,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:49,471 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:48:49,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:49,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990531563] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:49,540 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:49,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:48:49,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497317062] [2022-03-01 17:48:49,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:49,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:48:49,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:49,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:48:49,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:48:49,541 INFO L87 Difference]: Start difference. First operand 1885 states and 8284 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:50,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:50,275 INFO L93 Difference]: Finished difference Result 2569 states and 10738 transitions. [2022-03-01 17:48:50,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:48:50,275 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:50,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:50,282 INFO L225 Difference]: With dead ends: 2569 [2022-03-01 17:48:50,282 INFO L226 Difference]: Without dead ends: 2536 [2022-03-01 17:48:50,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:48:50,283 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 400 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:50,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 355 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:48:50,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2536 states. [2022-03-01 17:48:50,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2536 to 1824. [2022-03-01 17:48:50,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1823 states have (on average 4.393307734503566) internal successors, (8009), 1823 states have internal predecessors, (8009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:50,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 8009 transitions. [2022-03-01 17:48:50,321 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 8009 transitions. Word has length 29 [2022-03-01 17:48:50,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:50,321 INFO L470 AbstractCegarLoop]: Abstraction has 1824 states and 8009 transitions. [2022-03-01 17:48:50,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:50,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 8009 transitions. [2022-03-01 17:48:50,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:50,325 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:50,325 INFO L514 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] [2022-03-01 17:48:50,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-01 17:48:50,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-01 17:48:50,537 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:50,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:50,537 INFO L85 PathProgramCache]: Analyzing trace with hash -227789357, now seen corresponding path program 24 times [2022-03-01 17:48:50,538 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:50,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42878867] [2022-03-01 17:48:50,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:50,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:50,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:50,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42878867] [2022-03-01 17:48:50,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42878867] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:50,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253988466] [2022-03-01 17:48:50,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:48:50,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:50,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:50,649 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) [2022-03-01 17:48:50,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-01 17:48:50,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:48:50,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:50,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:50,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:50,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:50,806 INFO L387 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 [2022-03-01 17:48:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:51,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:51,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253988466] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:51,205 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:51,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-01 17:48:51,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361304338] [2022-03-01 17:48:51,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:51,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:48:51,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:51,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:48:51,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:48:51,206 INFO L87 Difference]: Start difference. First operand 1824 states and 8009 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:51,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:51,793 INFO L93 Difference]: Finished difference Result 1999 states and 8662 transitions. [2022-03-01 17:48:51,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:48:51,793 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:51,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:51,798 INFO L225 Difference]: With dead ends: 1999 [2022-03-01 17:48:51,798 INFO L226 Difference]: Without dead ends: 1984 [2022-03-01 17:48:51,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:48:51,799 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 125 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:51,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 343 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:48:51,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2022-03-01 17:48:51,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1809. [2022-03-01 17:48:51,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 4.397123893805309) internal successors, (7950), 1808 states have internal predecessors, (7950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:51,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 7950 transitions. [2022-03-01 17:48:51,845 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 7950 transitions. Word has length 29 [2022-03-01 17:48:51,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:51,845 INFO L470 AbstractCegarLoop]: Abstraction has 1809 states and 7950 transitions. [2022-03-01 17:48:51,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:51,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 7950 transitions. [2022-03-01 17:48:51,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:51,849 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:51,849 INFO L514 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] [2022-03-01 17:48:51,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:52,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-01 17:48:52,051 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:52,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:52,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1276561759, now seen corresponding path program 25 times [2022-03-01 17:48:52,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:52,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306116976] [2022-03-01 17:48:52,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:52,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:52,160 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:52,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306116976] [2022-03-01 17:48:52,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306116976] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:52,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64999724] [2022-03-01 17:48:52,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:48:52,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:52,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:52,161 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) [2022-03-01 17:48:52,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-01 17:48:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:52,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:52,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:52,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:48:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:52,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:52,581 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:52,582 INFO L387 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 17 treesize of output 22 [2022-03-01 17:48:52,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:52,591 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:48:52,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:52,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64999724] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:52,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:52,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 17:48:52,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862841475] [2022-03-01 17:48:52,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:52,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:48:52,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:52,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:48:52,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:48:52,658 INFO L87 Difference]: Start difference. First operand 1809 states and 7950 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:53,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:53,588 INFO L93 Difference]: Finished difference Result 2655 states and 11037 transitions. [2022-03-01 17:48:53,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:48:53,588 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:53,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:53,594 INFO L225 Difference]: With dead ends: 2655 [2022-03-01 17:48:53,594 INFO L226 Difference]: Without dead ends: 2617 [2022-03-01 17:48:53,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:48:53,595 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 601 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:53,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [601 Valid, 403 Invalid, 1468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1388 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:48:53,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2617 states. [2022-03-01 17:48:53,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2617 to 1921. [2022-03-01 17:48:53,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 4.422395833333334) internal successors, (8491), 1920 states have internal predecessors, (8491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:53,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 8491 transitions. [2022-03-01 17:48:53,629 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 8491 transitions. Word has length 29 [2022-03-01 17:48:53,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:53,629 INFO L470 AbstractCegarLoop]: Abstraction has 1921 states and 8491 transitions. [2022-03-01 17:48:53,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:53,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 8491 transitions. [2022-03-01 17:48:53,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:53,633 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:53,633 INFO L514 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] [2022-03-01 17:48:53,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:53,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-01 17:48:53,847 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:53,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:53,848 INFO L85 PathProgramCache]: Analyzing trace with hash 26710847, now seen corresponding path program 26 times [2022-03-01 17:48:53,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:53,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983720658] [2022-03-01 17:48:53,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:53,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:53,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:53,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:53,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:53,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983720658] [2022-03-01 17:48:53,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983720658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:53,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534025721] [2022-03-01 17:48:53,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:48:53,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:53,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:53,977 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) [2022-03-01 17:48:53,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-01 17:48:54,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:48:54,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:54,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:54,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:54,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:54,116 INFO L387 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 [2022-03-01 17:48:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:54,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:54,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:54,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534025721] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:54,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:54,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-03-01 17:48:54,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509870827] [2022-03-01 17:48:54,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:54,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:48:54,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:54,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:48:54,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:48:54,400 INFO L87 Difference]: Start difference. First operand 1921 states and 8491 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:54,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:54,892 INFO L93 Difference]: Finished difference Result 2244 states and 9582 transitions. [2022-03-01 17:48:54,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:48:54,892 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:54,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:54,898 INFO L225 Difference]: With dead ends: 2244 [2022-03-01 17:48:54,898 INFO L226 Difference]: Without dead ends: 2231 [2022-03-01 17:48:54,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:48:54,899 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 274 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:54,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 310 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:48:54,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2022-03-01 17:48:54,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 1921. [2022-03-01 17:48:54,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 4.420833333333333) internal successors, (8488), 1920 states have internal predecessors, (8488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:54,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 8488 transitions. [2022-03-01 17:48:54,933 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 8488 transitions. Word has length 29 [2022-03-01 17:48:54,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:54,933 INFO L470 AbstractCegarLoop]: Abstraction has 1921 states and 8488 transitions. [2022-03-01 17:48:54,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:54,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 8488 transitions. [2022-03-01 17:48:54,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:54,937 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:54,937 INFO L514 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] [2022-03-01 17:48:54,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-01 17:48:55,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-01 17:48:55,152 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:55,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:55,153 INFO L85 PathProgramCache]: Analyzing trace with hash -872651225, now seen corresponding path program 27 times [2022-03-01 17:48:55,153 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:55,153 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764610787] [2022-03-01 17:48:55,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:55,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:55,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:55,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:55,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764610787] [2022-03-01 17:48:55,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764610787] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:55,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515245420] [2022-03-01 17:48:55,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:48:55,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:55,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:55,291 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) [2022-03-01 17:48:55,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-01 17:48:55,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:48:55,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:55,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:55,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:55,476 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:55,476 INFO L387 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 [2022-03-01 17:48:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:55,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:55,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515245420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:55,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:55,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-01 17:48:55,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59031792] [2022-03-01 17:48:55,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:55,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:48:55,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:55,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:48:55,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:48:55,843 INFO L87 Difference]: Start difference. First operand 1921 states and 8488 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:56,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:56,497 INFO L93 Difference]: Finished difference Result 2209 states and 9500 transitions. [2022-03-01 17:48:56,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:48:56,497 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:56,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:56,503 INFO L225 Difference]: With dead ends: 2209 [2022-03-01 17:48:56,503 INFO L226 Difference]: Without dead ends: 2181 [2022-03-01 17:48:56,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:48:56,503 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 303 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:56,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 316 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:48:56,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2022-03-01 17:48:56,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 1881. [2022-03-01 17:48:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 4.421808510638298) internal successors, (8313), 1880 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:56,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 8313 transitions. [2022-03-01 17:48:56,537 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 8313 transitions. Word has length 29 [2022-03-01 17:48:56,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:56,537 INFO L470 AbstractCegarLoop]: Abstraction has 1881 states and 8313 transitions. [2022-03-01 17:48:56,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:56,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 8313 transitions. [2022-03-01 17:48:56,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:56,541 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:56,541 INFO L514 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] [2022-03-01 17:48:56,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-01 17:48:56,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:56,756 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:56,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:56,757 INFO L85 PathProgramCache]: Analyzing trace with hash -757329439, now seen corresponding path program 28 times [2022-03-01 17:48:56,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:56,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437450258] [2022-03-01 17:48:56,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:56,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:56,876 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:56,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437450258] [2022-03-01 17:48:56,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437450258] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:56,876 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262142676] [2022-03-01 17:48:56,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:48:56,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:56,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:56,877 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) [2022-03-01 17:48:56,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-01 17:48:56,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:48:56,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:56,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:48:56,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:57,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:48:57,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:57,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:57,336 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:57,336 INFO L387 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 17 treesize of output 22 [2022-03-01 17:48:57,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:57,345 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:48:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:57,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262142676] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:57,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:57,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-01 17:48:57,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580978241] [2022-03-01 17:48:57,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:57,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:48:57,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:57,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:48:57,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:48:57,411 INFO L87 Difference]: Start difference. First operand 1881 states and 8313 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:58,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:48:58,490 INFO L93 Difference]: Finished difference Result 2425 states and 10268 transitions. [2022-03-01 17:48:58,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:48:58,490 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:48:58,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:48:58,496 INFO L225 Difference]: With dead ends: 2425 [2022-03-01 17:48:58,496 INFO L226 Difference]: Without dead ends: 2387 [2022-03-01 17:48:58,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:48:58,497 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 384 mSDsluCounter, 1335 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:48:58,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 520 Invalid, 1786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1734 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 17:48:58,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2022-03-01 17:48:58,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 1881. [2022-03-01 17:48:58,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 4.421808510638298) internal successors, (8313), 1880 states have internal predecessors, (8313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:58,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 8313 transitions. [2022-03-01 17:48:58,527 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 8313 transitions. Word has length 29 [2022-03-01 17:48:58,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:48:58,527 INFO L470 AbstractCegarLoop]: Abstraction has 1881 states and 8313 transitions. [2022-03-01 17:48:58,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:48:58,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 8313 transitions. [2022-03-01 17:48:58,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:48:58,531 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:48:58,531 INFO L514 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] [2022-03-01 17:48:58,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-01 17:48:58,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-01 17:48:58,744 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:48:58,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:48:58,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1692151869, now seen corresponding path program 29 times [2022-03-01 17:48:58,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:48:58,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490599586] [2022-03-01 17:48:58,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:48:58,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:48:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:48:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:58,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:48:58,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490599586] [2022-03-01 17:48:58,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490599586] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:48:58,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428677503] [2022-03-01 17:48:58,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:48:58,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:48:58,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:48:58,853 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) [2022-03-01 17:48:58,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-01 17:48:58,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:48:58,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:48:58,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:48:58,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:48:59,074 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-03-01 17:48:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:59,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:48:59,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:48:59,320 INFO L387 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 17 treesize of output 22 [2022-03-01 17:48:59,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:48:59,332 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:48:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:48:59,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428677503] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:48:59,411 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:48:59,411 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2022-03-01 17:48:59,411 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541176296] [2022-03-01 17:48:59,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:48:59,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:48:59,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:48:59,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:48:59,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:48:59,413 INFO L87 Difference]: Start difference. First operand 1881 states and 8313 transitions. Second operand has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:00,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:00,344 INFO L93 Difference]: Finished difference Result 2447 states and 10393 transitions. [2022-03-01 17:49:00,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:49:00,344 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:00,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:00,350 INFO L225 Difference]: With dead ends: 2447 [2022-03-01 17:49:00,350 INFO L226 Difference]: Without dead ends: 2425 [2022-03-01 17:49:00,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:49:00,351 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 345 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:00,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 438 Invalid, 1551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:49:00,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2022-03-01 17:49:00,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1869. [2022-03-01 17:49:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 4.423982869379015) internal successors, (8264), 1868 states have internal predecessors, (8264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:00,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 8264 transitions. [2022-03-01 17:49:00,382 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 8264 transitions. Word has length 29 [2022-03-01 17:49:00,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:00,382 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 8264 transitions. [2022-03-01 17:49:00,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:00,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 8264 transitions. [2022-03-01 17:49:00,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:00,385 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:00,385 INFO L514 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] [2022-03-01 17:49:00,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:00,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-01 17:49:00,599 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:00,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:00,600 INFO L85 PathProgramCache]: Analyzing trace with hash -285338559, now seen corresponding path program 15 times [2022-03-01 17:49:00,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:00,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387005821] [2022-03-01 17:49:00,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:00,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:00,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:00,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387005821] [2022-03-01 17:49:00,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387005821] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:00,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971546024] [2022-03-01 17:49:00,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:49:00,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:00,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:00,702 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) [2022-03-01 17:49:00,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-01 17:49:00,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:49:00,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:00,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:00,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:00,894 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:00,894 INFO L387 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 15 treesize of output 19 [2022-03-01 17:49:01,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:01,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:01,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971546024] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:01,220 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:01,220 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-01 17:49:01,220 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437700452] [2022-03-01 17:49:01,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:01,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:49:01,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:01,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:49:01,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:01,221 INFO L87 Difference]: Start difference. First operand 1869 states and 8264 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:01,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:01,755 INFO L93 Difference]: Finished difference Result 2494 states and 10689 transitions. [2022-03-01 17:49:01,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:49:01,755 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:01,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:01,761 INFO L225 Difference]: With dead ends: 2494 [2022-03-01 17:49:01,761 INFO L226 Difference]: Without dead ends: 2475 [2022-03-01 17:49:01,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:49:01,762 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 357 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:01,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 360 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:49:01,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2022-03-01 17:49:01,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 1968. [2022-03-01 17:49:01,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1967 states have (on average 4.427046263345196) internal successors, (8708), 1967 states have internal predecessors, (8708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:01,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 8708 transitions. [2022-03-01 17:49:01,822 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 8708 transitions. Word has length 29 [2022-03-01 17:49:01,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:01,822 INFO L470 AbstractCegarLoop]: Abstraction has 1968 states and 8708 transitions. [2022-03-01 17:49:01,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:01,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 8708 transitions. [2022-03-01 17:49:01,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:01,826 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:01,826 INFO L514 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] [2022-03-01 17:49:01,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:02,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-01 17:49:02,041 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:02,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:02,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1137016267, now seen corresponding path program 16 times [2022-03-01 17:49:02,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:02,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971222688] [2022-03-01 17:49:02,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:02,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:02,108 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:02,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971222688] [2022-03-01 17:49:02,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971222688] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:02,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388060553] [2022-03-01 17:49:02,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:49:02,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:02,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:02,110 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) [2022-03-01 17:49:02,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-01 17:49:02,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:49:02,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:02,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:02,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:02,237 INFO L387 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 19 treesize of output 11 [2022-03-01 17:49:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:02,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:02,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:02,408 INFO L387 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 17 treesize of output 22 [2022-03-01 17:49:02,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:02,415 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:49:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:02,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388060553] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:02,457 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:02,457 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:49:02,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195894033] [2022-03-01 17:49:02,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:02,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:49:02,457 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:02,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:49:02,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:02,458 INFO L87 Difference]: Start difference. First operand 1968 states and 8708 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:03,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:03,373 INFO L93 Difference]: Finished difference Result 3178 states and 13290 transitions. [2022-03-01 17:49:03,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:49:03,374 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:03,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:03,381 INFO L225 Difference]: With dead ends: 3178 [2022-03-01 17:49:03,381 INFO L226 Difference]: Without dead ends: 3150 [2022-03-01 17:49:03,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:49:03,382 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 498 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 1603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:03,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 466 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 17:49:03,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3150 states. [2022-03-01 17:49:03,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3150 to 2117. [2022-03-01 17:49:03,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 4.453213610586011) internal successors, (9423), 2116 states have internal predecessors, (9423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:03,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 9423 transitions. [2022-03-01 17:49:03,422 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 9423 transitions. Word has length 29 [2022-03-01 17:49:03,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:03,422 INFO L470 AbstractCegarLoop]: Abstraction has 2117 states and 9423 transitions. [2022-03-01 17:49:03,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:03,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 9423 transitions. [2022-03-01 17:49:03,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:03,427 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:03,427 INFO L514 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] [2022-03-01 17:49:03,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:03,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:03,643 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:03,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:03,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1537889799, now seen corresponding path program 17 times [2022-03-01 17:49:03,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:03,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779226550] [2022-03-01 17:49:03,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:03,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:03,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:03,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779226550] [2022-03-01 17:49:03,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779226550] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:03,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626037158] [2022-03-01 17:49:03,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:49:03,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:03,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:03,734 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) [2022-03-01 17:49:03,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-01 17:49:03,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:03,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:03,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:03,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:03,899 INFO L387 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 19 treesize of output 11 [2022-03-01 17:49:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:03,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:04,093 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:04,093 INFO L387 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 17 treesize of output 22 [2022-03-01 17:49:04,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:04,102 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:49:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:04,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626037158] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:04,145 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:04,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:49:04,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587832486] [2022-03-01 17:49:04,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:04,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:49:04,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:04,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:49:04,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:04,147 INFO L87 Difference]: Start difference. First operand 2117 states and 9423 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:04,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:04,840 INFO L93 Difference]: Finished difference Result 3185 states and 13307 transitions. [2022-03-01 17:49:04,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:49:04,840 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:04,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:04,847 INFO L225 Difference]: With dead ends: 3185 [2022-03-01 17:49:04,848 INFO L226 Difference]: Without dead ends: 3152 [2022-03-01 17:49:04,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:49:04,849 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 501 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:04,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 431 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:49:04,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3152 states. [2022-03-01 17:49:04,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3152 to 2007. [2022-03-01 17:49:04,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2007 states, 2006 states have (on average 4.436689930209372) internal successors, (8900), 2006 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:04,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2007 states to 2007 states and 8900 transitions. [2022-03-01 17:49:04,890 INFO L78 Accepts]: Start accepts. Automaton has 2007 states and 8900 transitions. Word has length 29 [2022-03-01 17:49:04,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:04,890 INFO L470 AbstractCegarLoop]: Abstraction has 2007 states and 8900 transitions. [2022-03-01 17:49:04,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:04,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2007 states and 8900 transitions. [2022-03-01 17:49:04,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:04,894 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:04,894 INFO L514 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] [2022-03-01 17:49:04,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:05,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:05,110 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:05,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:05,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1175894491, now seen corresponding path program 18 times [2022-03-01 17:49:05,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:05,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270782897] [2022-03-01 17:49:05,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:05,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:05,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:05,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:05,236 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:05,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270782897] [2022-03-01 17:49:05,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270782897] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:05,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53009162] [2022-03-01 17:49:05,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:49:05,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:05,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:05,237 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) [2022-03-01 17:49:05,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-01 17:49:05,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:49:05,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:05,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:05,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:05,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:05,431 INFO L387 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 15 treesize of output 19 [2022-03-01 17:49:05,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:05,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:05,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53009162] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:05,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:05,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-01 17:49:05,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903192843] [2022-03-01 17:49:05,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:05,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:49:05,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:05,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:49:05,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:05,783 INFO L87 Difference]: Start difference. First operand 2007 states and 8900 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:06,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:06,330 INFO L93 Difference]: Finished difference Result 2343 states and 10168 transitions. [2022-03-01 17:49:06,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:49:06,330 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:06,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:06,336 INFO L225 Difference]: With dead ends: 2343 [2022-03-01 17:49:06,336 INFO L226 Difference]: Without dead ends: 2328 [2022-03-01 17:49:06,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:49:06,337 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 160 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:06,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 333 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1127 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:49:06,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2022-03-01 17:49:06,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 1989. [2022-03-01 17:49:06,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1989 states, 1988 states have (on average 4.437625754527163) internal successors, (8822), 1988 states have internal predecessors, (8822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 8822 transitions. [2022-03-01 17:49:06,370 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 8822 transitions. Word has length 29 [2022-03-01 17:49:06,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:06,370 INFO L470 AbstractCegarLoop]: Abstraction has 1989 states and 8822 transitions. [2022-03-01 17:49:06,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:06,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 8822 transitions. [2022-03-01 17:49:06,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:06,373 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:06,373 INFO L514 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] [2022-03-01 17:49:06,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:06,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:06,589 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:06,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:06,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1539061893, now seen corresponding path program 19 times [2022-03-01 17:49:06,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:06,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188916876] [2022-03-01 17:49:06,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:06,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:06,688 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:06,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188916876] [2022-03-01 17:49:06,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188916876] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:06,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619587900] [2022-03-01 17:49:06,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:49:06,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:06,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:06,690 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) [2022-03-01 17:49:06,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-01 17:49:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:06,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:06,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:06,941 INFO L387 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 19 treesize of output 11 [2022-03-01 17:49:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:06,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:07,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:07,075 INFO L387 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 17 treesize of output 22 [2022-03-01 17:49:07,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:07,081 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:49:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:07,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619587900] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:07,129 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:07,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-01 17:49:07,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082669812] [2022-03-01 17:49:07,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:07,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:49:07,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:07,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:49:07,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:49:07,130 INFO L87 Difference]: Start difference. First operand 1989 states and 8822 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:08,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:08,157 INFO L93 Difference]: Finished difference Result 2370 states and 10258 transitions. [2022-03-01 17:49:08,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:49:08,157 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:08,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:08,163 INFO L225 Difference]: With dead ends: 2370 [2022-03-01 17:49:08,163 INFO L226 Difference]: Without dead ends: 2355 [2022-03-01 17:49:08,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:49:08,168 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 294 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:08,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 482 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1664 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:49:08,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2022-03-01 17:49:08,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 1989. [2022-03-01 17:49:08,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1989 states, 1988 states have (on average 4.437625754527163) internal successors, (8822), 1988 states have internal predecessors, (8822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:08,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 8822 transitions. [2022-03-01 17:49:08,220 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 8822 transitions. Word has length 29 [2022-03-01 17:49:08,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:08,220 INFO L470 AbstractCegarLoop]: Abstraction has 1989 states and 8822 transitions. [2022-03-01 17:49:08,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:08,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 8822 transitions. [2022-03-01 17:49:08,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:08,224 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:08,224 INFO L514 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] [2022-03-01 17:49:08,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:08,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-01 17:49:08,439 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:08,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:08,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1973091239, now seen corresponding path program 20 times [2022-03-01 17:49:08,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:08,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405960738] [2022-03-01 17:49:08,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:08,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:08,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:08,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:08,568 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:08,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405960738] [2022-03-01 17:49:08,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405960738] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:08,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34117936] [2022-03-01 17:49:08,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:49:08,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:08,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:08,569 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) [2022-03-01 17:49:08,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-01 17:49:08,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:08,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:08,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:08,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:08,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:08,766 INFO L387 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 15 treesize of output 19 [2022-03-01 17:49:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:08,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:09,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34117936] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:09,041 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:09,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-03-01 17:49:09,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460480545] [2022-03-01 17:49:09,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:09,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:49:09,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:09,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:49:09,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:49:09,042 INFO L87 Difference]: Start difference. First operand 1989 states and 8822 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 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) [2022-03-01 17:49:09,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:09,640 INFO L93 Difference]: Finished difference Result 2428 states and 10312 transitions. [2022-03-01 17:49:09,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:49:09,640 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 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 29 [2022-03-01 17:49:09,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:09,646 INFO L225 Difference]: With dead ends: 2428 [2022-03-01 17:49:09,646 INFO L226 Difference]: Without dead ends: 2413 [2022-03-01 17:49:09,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:49:09,646 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 246 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:09,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 393 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:49:09,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2022-03-01 17:49:09,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 1962. [2022-03-01 17:49:09,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 4.448750637429883) internal successors, (8724), 1961 states have internal predecessors, (8724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 8724 transitions. [2022-03-01 17:49:09,678 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 8724 transitions. Word has length 29 [2022-03-01 17:49:09,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:09,679 INFO L470 AbstractCegarLoop]: Abstraction has 1962 states and 8724 transitions. [2022-03-01 17:49:09,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 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) [2022-03-01 17:49:09,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 8724 transitions. [2022-03-01 17:49:09,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:09,682 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:09,682 INFO L514 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] [2022-03-01 17:49:09,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:09,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-01 17:49:09,897 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:09,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:09,898 INFO L85 PathProgramCache]: Analyzing trace with hash 2139067589, now seen corresponding path program 21 times [2022-03-01 17:49:09,898 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:09,898 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388007786] [2022-03-01 17:49:09,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:09,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:09,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:10,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:10,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388007786] [2022-03-01 17:49:10,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388007786] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:10,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643570969] [2022-03-01 17:49:10,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:49:10,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:10,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:10,044 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) [2022-03-01 17:49:10,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-01 17:49:10,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:49:10,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:10,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:10,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:10,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:10,224 INFO L387 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 [2022-03-01 17:49:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:10,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:10,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643570969] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:10,636 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:10,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-01 17:49:10,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80995157] [2022-03-01 17:49:10,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:10,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:49:10,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:10,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:49:10,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:49:10,637 INFO L87 Difference]: Start difference. First operand 1962 states and 8724 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:11,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:11,122 INFO L93 Difference]: Finished difference Result 2348 states and 10185 transitions. [2022-03-01 17:49:11,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:49:11,122 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:11,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:11,128 INFO L225 Difference]: With dead ends: 2348 [2022-03-01 17:49:11,128 INFO L226 Difference]: Without dead ends: 2329 [2022-03-01 17:49:11,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:49:11,132 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 281 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:11,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 333 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:49:11,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2329 states. [2022-03-01 17:49:11,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2329 to 1998. [2022-03-01 17:49:11,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1998 states, 1997 states have (on average 4.451176765147721) internal successors, (8889), 1997 states have internal predecessors, (8889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:11,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1998 states to 1998 states and 8889 transitions. [2022-03-01 17:49:11,171 INFO L78 Accepts]: Start accepts. Automaton has 1998 states and 8889 transitions. Word has length 29 [2022-03-01 17:49:11,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:11,171 INFO L470 AbstractCegarLoop]: Abstraction has 1998 states and 8889 transitions. [2022-03-01 17:49:11,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:11,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1998 states and 8889 transitions. [2022-03-01 17:49:11,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:11,176 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:11,176 INFO L514 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] [2022-03-01 17:49:11,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:11,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-01 17:49:11,394 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:11,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:11,395 INFO L85 PathProgramCache]: Analyzing trace with hash -733544881, now seen corresponding path program 22 times [2022-03-01 17:49:11,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:11,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289225482] [2022-03-01 17:49:11,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:11,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:11,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:11,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:11,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289225482] [2022-03-01 17:49:11,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289225482] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:11,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489499104] [2022-03-01 17:49:11,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:49:11,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:11,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:11,495 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) [2022-03-01 17:49:11,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-01 17:49:11,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:49:11,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:11,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:11,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:11,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:49:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:11,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:11,925 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:11,926 INFO L387 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 17 treesize of output 22 [2022-03-01 17:49:11,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:11,935 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:49:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:11,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489499104] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:11,989 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:11,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:49:11,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59190856] [2022-03-01 17:49:11,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:11,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:49:11,989 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:11,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:49:11,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:11,990 INFO L87 Difference]: Start difference. First operand 1998 states and 8889 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:12,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:12,733 INFO L93 Difference]: Finished difference Result 2888 states and 12212 transitions. [2022-03-01 17:49:12,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:49:12,733 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:12,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:12,739 INFO L225 Difference]: With dead ends: 2888 [2022-03-01 17:49:12,739 INFO L226 Difference]: Without dead ends: 2860 [2022-03-01 17:49:12,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:49:12,740 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 337 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 1395 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:12,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 422 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1395 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:49:12,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2022-03-01 17:49:12,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 2123. [2022-03-01 17:49:12,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 4.463242224316683) internal successors, (9471), 2122 states have internal predecessors, (9471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:12,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 9471 transitions. [2022-03-01 17:49:12,775 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 9471 transitions. Word has length 29 [2022-03-01 17:49:12,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:12,775 INFO L470 AbstractCegarLoop]: Abstraction has 2123 states and 9471 transitions. [2022-03-01 17:49:12,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:12,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 9471 transitions. [2022-03-01 17:49:12,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:12,779 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:12,779 INFO L514 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] [2022-03-01 17:49:12,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-01 17:49:12,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-01 17:49:12,995 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:12,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:12,995 INFO L85 PathProgramCache]: Analyzing trace with hash -332671349, now seen corresponding path program 23 times [2022-03-01 17:49:12,995 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:12,995 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211058615] [2022-03-01 17:49:12,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:12,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:12,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:13,089 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:13,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211058615] [2022-03-01 17:49:13,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211058615] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:13,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665810910] [2022-03-01 17:49:13,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:49:13,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:13,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:13,090 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) [2022-03-01 17:49:13,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-01 17:49:13,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:13,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:13,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:13,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:13,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:49:13,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:13,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:13,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:13,475 INFO L387 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 17 treesize of output 22 [2022-03-01 17:49:13,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:13,484 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:49:13,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:13,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665810910] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:13,533 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:13,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:49:13,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087782127] [2022-03-01 17:49:13,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:13,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:49:13,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:13,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:49:13,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:13,534 INFO L87 Difference]: Start difference. First operand 2123 states and 9471 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:14,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:14,236 INFO L93 Difference]: Finished difference Result 2895 states and 12229 transitions. [2022-03-01 17:49:14,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:49:14,237 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:14,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:14,243 INFO L225 Difference]: With dead ends: 2895 [2022-03-01 17:49:14,243 INFO L226 Difference]: Without dead ends: 2862 [2022-03-01 17:49:14,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:49:14,244 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 335 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:14,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 388 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:49:14,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2862 states. [2022-03-01 17:49:14,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2862 to 2028. [2022-03-01 17:49:14,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 4.461272816970893) internal successors, (9043), 2027 states have internal predecessors, (9043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 9043 transitions. [2022-03-01 17:49:14,280 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 9043 transitions. Word has length 29 [2022-03-01 17:49:14,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:14,280 INFO L470 AbstractCegarLoop]: Abstraction has 2028 states and 9043 transitions. [2022-03-01 17:49:14,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:14,280 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 9043 transitions. [2022-03-01 17:49:14,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:14,284 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:14,284 INFO L514 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] [2022-03-01 17:49:14,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:14,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-01 17:49:14,499 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:14,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:14,500 INFO L85 PathProgramCache]: Analyzing trace with hash -694666657, now seen corresponding path program 24 times [2022-03-01 17:49:14,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:14,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895121856] [2022-03-01 17:49:14,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:14,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:14,621 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:14,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895121856] [2022-03-01 17:49:14,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895121856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:14,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105488987] [2022-03-01 17:49:14,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:49:14,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:14,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:14,623 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) [2022-03-01 17:49:14,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-01 17:49:14,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:49:14,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:14,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:14,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:14,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:14,770 INFO L387 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 [2022-03-01 17:49:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:15,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:15,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:15,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105488987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:15,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:15,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-01 17:49:15,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736038804] [2022-03-01 17:49:15,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:15,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:49:15,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:15,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:49:15,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:49:15,147 INFO L87 Difference]: Start difference. First operand 2028 states and 9043 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:15,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:15,560 INFO L93 Difference]: Finished difference Result 2182 states and 9610 transitions. [2022-03-01 17:49:15,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:49:15,561 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:15,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:15,565 INFO L225 Difference]: With dead ends: 2182 [2022-03-01 17:49:15,565 INFO L226 Difference]: Without dead ends: 2167 [2022-03-01 17:49:15,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:49:15,566 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 100 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:15,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 387 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:49:15,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2022-03-01 17:49:15,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 2007. [2022-03-01 17:49:15,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2007 states, 2006 states have (on average 4.464107676969093) internal successors, (8955), 2006 states have internal predecessors, (8955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:15,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2007 states to 2007 states and 8955 transitions. [2022-03-01 17:49:15,594 INFO L78 Accepts]: Start accepts. Automaton has 2007 states and 8955 transitions. Word has length 29 [2022-03-01 17:49:15,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:15,594 INFO L470 AbstractCegarLoop]: Abstraction has 2007 states and 8955 transitions. [2022-03-01 17:49:15,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:15,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2007 states and 8955 transitions. [2022-03-01 17:49:15,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:15,598 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:15,598 INFO L514 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] [2022-03-01 17:49:15,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:15,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-01 17:49:15,813 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:15,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:15,814 INFO L85 PathProgramCache]: Analyzing trace with hash -2058717311, now seen corresponding path program 25 times [2022-03-01 17:49:15,814 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:15,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761298284] [2022-03-01 17:49:15,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:15,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:15,934 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:15,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761298284] [2022-03-01 17:49:15,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761298284] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:15,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388988974] [2022-03-01 17:49:15,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:49:15,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:15,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:15,946 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) [2022-03-01 17:49:15,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-01 17:49:15,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:15,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:15,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:16,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:49:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:16,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:16,256 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:16,257 INFO L387 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 17 treesize of output 22 [2022-03-01 17:49:16,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:16,265 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:49:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:16,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388988974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:16,305 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:16,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 17:49:16,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264491855] [2022-03-01 17:49:16,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:16,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:49:16,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:16,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:49:16,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:49:16,306 INFO L87 Difference]: Start difference. First operand 2007 states and 8955 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:16,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:16,956 INFO L93 Difference]: Finished difference Result 2978 states and 12458 transitions. [2022-03-01 17:49:16,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:49:16,956 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:16,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:16,963 INFO L225 Difference]: With dead ends: 2978 [2022-03-01 17:49:16,964 INFO L226 Difference]: Without dead ends: 2940 [2022-03-01 17:49:16,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:49:16,964 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 522 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:16,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 424 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:49:16,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2022-03-01 17:49:16,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2133. [2022-03-01 17:49:16,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2133 states, 2132 states have (on average 4.473264540337711) internal successors, (9537), 2132 states have internal predecessors, (9537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:17,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2133 states to 2133 states and 9537 transitions. [2022-03-01 17:49:17,004 INFO L78 Accepts]: Start accepts. Automaton has 2133 states and 9537 transitions. Word has length 29 [2022-03-01 17:49:17,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:17,004 INFO L470 AbstractCegarLoop]: Abstraction has 2133 states and 9537 transitions. [2022-03-01 17:49:17,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:17,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2133 states and 9537 transitions. [2022-03-01 17:49:17,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:17,008 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:17,008 INFO L514 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] [2022-03-01 17:49:17,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-01 17:49:17,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:17,224 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:17,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:17,224 INFO L85 PathProgramCache]: Analyzing trace with hash -636362485, now seen corresponding path program 26 times [2022-03-01 17:49:17,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:17,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484233634] [2022-03-01 17:49:17,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:17,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:17,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:17,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:17,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484233634] [2022-03-01 17:49:17,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484233634] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:17,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877089234] [2022-03-01 17:49:17,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:49:17,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:17,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:17,296 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) [2022-03-01 17:49:17,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-01 17:49:17,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:17,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:17,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:17,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:17,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:17,408 INFO L387 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 [2022-03-01 17:49:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:17,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:17,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877089234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:17,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:17,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-03-01 17:49:17,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385757346] [2022-03-01 17:49:17,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:17,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:49:17,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:17,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:49:17,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:17,736 INFO L87 Difference]: Start difference. First operand 2133 states and 9537 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:18,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:18,257 INFO L93 Difference]: Finished difference Result 2472 states and 10662 transitions. [2022-03-01 17:49:18,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:49:18,257 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:18,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:18,263 INFO L225 Difference]: With dead ends: 2472 [2022-03-01 17:49:18,263 INFO L226 Difference]: Without dead ends: 2459 [2022-03-01 17:49:18,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:49:18,263 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 352 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:18,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 281 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:49:18,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2022-03-01 17:49:18,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2133. [2022-03-01 17:49:18,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2133 states, 2132 states have (on average 4.471857410881801) internal successors, (9534), 2132 states have internal predecessors, (9534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:18,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2133 states to 2133 states and 9534 transitions. [2022-03-01 17:49:18,298 INFO L78 Accepts]: Start accepts. Automaton has 2133 states and 9534 transitions. Word has length 29 [2022-03-01 17:49:18,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:18,298 INFO L470 AbstractCegarLoop]: Abstraction has 2133 states and 9534 transitions. [2022-03-01 17:49:18,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:18,298 INFO L276 IsEmpty]: Start isEmpty. Operand 2133 states and 9534 transitions. [2022-03-01 17:49:18,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:18,302 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:18,302 INFO L514 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] [2022-03-01 17:49:18,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:18,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:18,517 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:18,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:18,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1081464505, now seen corresponding path program 27 times [2022-03-01 17:49:18,518 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:18,518 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592896341] [2022-03-01 17:49:18,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:18,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:18,628 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:18,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592896341] [2022-03-01 17:49:18,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592896341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:18,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192405399] [2022-03-01 17:49:18,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:49:18,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:18,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:18,629 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) [2022-03-01 17:49:18,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-01 17:49:18,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:49:18,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:18,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:18,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:18,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:18,789 INFO L387 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 [2022-03-01 17:49:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:18,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:19,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192405399] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:19,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:19,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-01 17:49:19,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039357557] [2022-03-01 17:49:19,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:19,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:49:19,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:19,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:49:19,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:49:19,090 INFO L87 Difference]: Start difference. First operand 2133 states and 9534 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:19,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:19,495 INFO L93 Difference]: Finished difference Result 2427 states and 10549 transitions. [2022-03-01 17:49:19,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:49:19,496 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:19,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:19,501 INFO L225 Difference]: With dead ends: 2427 [2022-03-01 17:49:19,501 INFO L226 Difference]: Without dead ends: 2399 [2022-03-01 17:49:19,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:49:19,502 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 279 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:19,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 280 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:49:19,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2022-03-01 17:49:19,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2079. [2022-03-01 17:49:19,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2078 states have (on average 4.472569778633301) internal successors, (9294), 2078 states have internal predecessors, (9294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:19,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 9294 transitions. [2022-03-01 17:49:19,568 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 9294 transitions. Word has length 29 [2022-03-01 17:49:19,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:19,568 INFO L470 AbstractCegarLoop]: Abstraction has 2079 states and 9294 transitions. [2022-03-01 17:49:19,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:19,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 9294 transitions. [2022-03-01 17:49:19,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:19,572 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:19,572 INFO L514 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] [2022-03-01 17:49:19,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-01 17:49:19,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:19,787 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:19,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:19,788 INFO L85 PathProgramCache]: Analyzing trace with hash 484686529, now seen corresponding path program 28 times [2022-03-01 17:49:19,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:19,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007409403] [2022-03-01 17:49:19,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:19,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:19,932 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:19,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007409403] [2022-03-01 17:49:19,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007409403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:19,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451022396] [2022-03-01 17:49:19,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:49:19,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:19,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:19,933 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) [2022-03-01 17:49:19,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-01 17:49:19,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:49:19,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:19,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:19,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:20,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:49:20,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:20,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:20,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:20,381 INFO L387 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 17 treesize of output 22 [2022-03-01 17:49:20,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:20,391 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:49:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:20,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451022396] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:20,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:20,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-01 17:49:20,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72824006] [2022-03-01 17:49:20,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:20,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:49:20,446 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:20,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:49:20,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:49:20,447 INFO L87 Difference]: Start difference. First operand 2079 states and 9294 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:21,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:21,384 INFO L93 Difference]: Finished difference Result 2708 states and 11522 transitions. [2022-03-01 17:49:21,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:49:21,384 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:21,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:21,390 INFO L225 Difference]: With dead ends: 2708 [2022-03-01 17:49:21,390 INFO L226 Difference]: Without dead ends: 2670 [2022-03-01 17:49:21,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:49:21,391 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 376 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 2041 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 2097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:21,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 632 Invalid, 2097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2041 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:49:21,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2670 states. [2022-03-01 17:49:21,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2670 to 2082. [2022-03-01 17:49:21,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2082 states, 2081 states have (on average 4.470446900528592) internal successors, (9303), 2081 states have internal predecessors, (9303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:21,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 9303 transitions. [2022-03-01 17:49:21,423 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 9303 transitions. Word has length 29 [2022-03-01 17:49:21,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:21,423 INFO L470 AbstractCegarLoop]: Abstraction has 2082 states and 9303 transitions. [2022-03-01 17:49:21,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:21,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 9303 transitions. [2022-03-01 17:49:21,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:21,427 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:21,427 INFO L514 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] [2022-03-01 17:49:21,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:21,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-03-01 17:49:21,643 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:21,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:21,644 INFO L85 PathProgramCache]: Analyzing trace with hash -838291121, now seen corresponding path program 29 times [2022-03-01 17:49:21,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:21,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349015137] [2022-03-01 17:49:21,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:21,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:21,760 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:21,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349015137] [2022-03-01 17:49:21,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349015137] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:21,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451979295] [2022-03-01 17:49:21,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:49:21,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:21,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:21,761 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) [2022-03-01 17:49:21,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-01 17:49:21,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:49:21,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:21,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-01 17:49:21,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:21,975 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:21,975 INFO L387 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 [2022-03-01 17:49:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:22,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:22,343 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:22,343 INFO L387 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 17 treesize of output 22 [2022-03-01 17:49:22,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:22,375 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:49:22,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:22,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451979295] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:22,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:22,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-03-01 17:49:22,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480549207] [2022-03-01 17:49:22,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:22,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:49:22,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:22,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:49:22,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:49:22,459 INFO L87 Difference]: Start difference. First operand 2082 states and 9303 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:23,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:23,046 INFO L93 Difference]: Finished difference Result 2482 states and 10735 transitions. [2022-03-01 17:49:23,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:49:23,046 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:23,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:23,052 INFO L225 Difference]: With dead ends: 2482 [2022-03-01 17:49:23,052 INFO L226 Difference]: Without dead ends: 2456 [2022-03-01 17:49:23,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:49:23,053 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 159 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:23,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 412 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 807 Invalid, 0 Unknown, 80 Unchecked, 0.3s Time] [2022-03-01 17:49:23,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2022-03-01 17:49:23,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 2114. [2022-03-01 17:49:23,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 4.472314245149077) internal successors, (9450), 2113 states have internal predecessors, (9450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:23,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 9450 transitions. [2022-03-01 17:49:23,088 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 9450 transitions. Word has length 29 [2022-03-01 17:49:23,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:23,088 INFO L470 AbstractCegarLoop]: Abstraction has 2114 states and 9450 transitions. [2022-03-01 17:49:23,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:23,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 9450 transitions. [2022-03-01 17:49:23,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:23,091 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:23,092 INFO L514 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] [2022-03-01 17:49:23,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:23,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-03-01 17:49:23,310 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:23,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:23,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1504652747, now seen corresponding path program 30 times [2022-03-01 17:49:23,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:23,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479314752] [2022-03-01 17:49:23,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:23,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:23,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:23,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479314752] [2022-03-01 17:49:23,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479314752] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:23,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87214287] [2022-03-01 17:49:23,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:49:23,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:23,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:23,429 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) [2022-03-01 17:49:23,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-01 17:49:23,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:49:23,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:23,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:49:23,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:23,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:49:23,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:23,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:23,846 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:23,846 INFO L387 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 17 treesize of output 22 [2022-03-01 17:49:23,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:23,858 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:49:23,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:23,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87214287] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:23,920 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:23,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:49:23,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115621757] [2022-03-01 17:49:23,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:23,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:49:23,920 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:23,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:49:23,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:23,921 INFO L87 Difference]: Start difference. First operand 2114 states and 9450 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:24,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:24,691 INFO L93 Difference]: Finished difference Result 2705 states and 11560 transitions. [2022-03-01 17:49:24,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:49:24,691 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:24,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:24,698 INFO L225 Difference]: With dead ends: 2705 [2022-03-01 17:49:24,698 INFO L226 Difference]: Without dead ends: 2683 [2022-03-01 17:49:24,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:49:24,698 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 321 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:24,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 381 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:49:24,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2683 states. [2022-03-01 17:49:24,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2683 to 2067. [2022-03-01 17:49:24,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 4.4767666989351405) internal successors, (9249), 2066 states have internal predecessors, (9249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:24,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 9249 transitions. [2022-03-01 17:49:24,731 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 9249 transitions. Word has length 29 [2022-03-01 17:49:24,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:24,731 INFO L470 AbstractCegarLoop]: Abstraction has 2067 states and 9249 transitions. [2022-03-01 17:49:24,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:24,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 9249 transitions. [2022-03-01 17:49:24,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:24,735 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:24,735 INFO L514 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] [2022-03-01 17:49:24,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:24,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:24,950 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:24,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:24,951 INFO L85 PathProgramCache]: Analyzing trace with hash -2032401569, now seen corresponding path program 1 times [2022-03-01 17:49:24,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:24,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344354003] [2022-03-01 17:49:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:24,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:25,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:25,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:25,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344354003] [2022-03-01 17:49:25,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344354003] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:25,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381320288] [2022-03-01 17:49:25,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:25,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:25,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:25,050 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) [2022-03-01 17:49:25,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-01 17:49:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:25,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:25,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:25,325 INFO L387 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 [2022-03-01 17:49:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:25,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:25,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:25,542 INFO L387 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 17 treesize of output 22 [2022-03-01 17:49:25,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:25,551 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:49:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:25,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381320288] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:25,585 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:25,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-01 17:49:25,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468888951] [2022-03-01 17:49:25,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:25,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:49:25,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:25,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:49:25,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:49:25,586 INFO L87 Difference]: Start difference. First operand 2067 states and 9249 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:26,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:26,497 INFO L93 Difference]: Finished difference Result 2547 states and 11053 transitions. [2022-03-01 17:49:26,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:49:26,498 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:26,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:26,504 INFO L225 Difference]: With dead ends: 2547 [2022-03-01 17:49:26,504 INFO L226 Difference]: Without dead ends: 2528 [2022-03-01 17:49:26,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:49:26,504 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 361 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:26,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 427 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1588 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:49:26,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2022-03-01 17:49:26,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 2169. [2022-03-01 17:49:26,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2168 states have (on average 4.455719557195572) internal successors, (9660), 2168 states have internal predecessors, (9660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:26,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 9660 transitions. [2022-03-01 17:49:26,537 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 9660 transitions. Word has length 29 [2022-03-01 17:49:26,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:26,537 INFO L470 AbstractCegarLoop]: Abstraction has 2169 states and 9660 transitions. [2022-03-01 17:49:26,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:26,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 9660 transitions. [2022-03-01 17:49:26,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:26,541 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:26,541 INFO L514 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] [2022-03-01 17:49:26,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:26,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:26,754 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:26,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:26,754 INFO L85 PathProgramCache]: Analyzing trace with hash -2037171777, now seen corresponding path program 1 times [2022-03-01 17:49:26,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:26,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674822302] [2022-03-01 17:49:26,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:26,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:26,831 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:26,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674822302] [2022-03-01 17:49:26,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674822302] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:26,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572725012] [2022-03-01 17:49:26,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:26,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:26,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:26,832 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) [2022-03-01 17:49:26,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-01 17:49:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:26,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:26,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:27,046 INFO L387 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 [2022-03-01 17:49:27,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:27,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:27,215 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:27,215 INFO L387 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 17 treesize of output 22 [2022-03-01 17:49:27,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:27,225 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:49:27,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:27,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572725012] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:27,249 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:27,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-01 17:49:27,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723392353] [2022-03-01 17:49:27,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:27,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:49:27,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:27,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:49:27,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:49:27,250 INFO L87 Difference]: Start difference. First operand 2169 states and 9660 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:27,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:27,947 INFO L93 Difference]: Finished difference Result 2568 states and 11112 transitions. [2022-03-01 17:49:27,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:49:27,947 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:27,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:27,953 INFO L225 Difference]: With dead ends: 2568 [2022-03-01 17:49:27,953 INFO L226 Difference]: Without dead ends: 2549 [2022-03-01 17:49:27,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:49:27,953 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 340 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:27,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 419 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1500 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:49:27,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2022-03-01 17:49:27,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 2171. [2022-03-01 17:49:27,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2171 states, 2170 states have (on average 4.455299539170507) internal successors, (9668), 2170 states have internal predecessors, (9668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:27,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 9668 transitions. [2022-03-01 17:49:27,986 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 9668 transitions. Word has length 29 [2022-03-01 17:49:27,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:27,986 INFO L470 AbstractCegarLoop]: Abstraction has 2171 states and 9668 transitions. [2022-03-01 17:49:27,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:27,986 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 9668 transitions. [2022-03-01 17:49:27,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:27,990 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:27,990 INFO L514 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] [2022-03-01 17:49:28,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:28,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-01 17:49:28,199 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:28,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:28,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1254794295, now seen corresponding path program 2 times [2022-03-01 17:49:28,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:28,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517702308] [2022-03-01 17:49:28,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:28,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:28,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:28,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:28,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517702308] [2022-03-01 17:49:28,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517702308] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:28,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959958100] [2022-03-01 17:49:28,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:49:28,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:28,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:28,299 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) [2022-03-01 17:49:28,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-01 17:49:28,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:28,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:28,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:28,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:28,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:28,514 INFO L387 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 [2022-03-01 17:49:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:28,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:28,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:28,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959958100] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:28,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:28,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-01 17:49:28,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393778258] [2022-03-01 17:49:28,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:28,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:49:28,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:28,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:49:28,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:28,749 INFO L87 Difference]: Start difference. First operand 2171 states and 9668 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:29,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:29,078 INFO L93 Difference]: Finished difference Result 2471 states and 10753 transitions. [2022-03-01 17:49:29,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:49:29,078 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:29,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:29,084 INFO L225 Difference]: With dead ends: 2471 [2022-03-01 17:49:29,084 INFO L226 Difference]: Without dead ends: 2452 [2022-03-01 17:49:29,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:49:29,084 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 133 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:29,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 323 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:49:29,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2022-03-01 17:49:29,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2171. [2022-03-01 17:49:29,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2171 states, 2170 states have (on average 4.455299539170507) internal successors, (9668), 2170 states have internal predecessors, (9668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:29,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 9668 transitions. [2022-03-01 17:49:29,115 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 9668 transitions. Word has length 29 [2022-03-01 17:49:29,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:29,116 INFO L470 AbstractCegarLoop]: Abstraction has 2171 states and 9668 transitions. [2022-03-01 17:49:29,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:29,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 9668 transitions. [2022-03-01 17:49:29,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:29,119 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:29,119 INFO L514 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] [2022-03-01 17:49:29,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-01 17:49:29,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-01 17:49:29,333 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:29,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:29,333 INFO L85 PathProgramCache]: Analyzing trace with hash 691196871, now seen corresponding path program 3 times [2022-03-01 17:49:29,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:29,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976641639] [2022-03-01 17:49:29,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:29,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:29,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:29,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976641639] [2022-03-01 17:49:29,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976641639] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:29,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172985351] [2022-03-01 17:49:29,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:49:29,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:29,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:29,421 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) [2022-03-01 17:49:29,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-01 17:49:29,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:49:29,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:29,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:29,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:29,675 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:29,676 INFO L387 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 15 treesize of output 19 [2022-03-01 17:49:29,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:29,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:29,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172985351] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:29,961 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:29,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-01 17:49:29,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088907423] [2022-03-01 17:49:29,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:29,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:49:29,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:29,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:49:29,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:29,961 INFO L87 Difference]: Start difference. First operand 2171 states and 9668 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:30,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:30,430 INFO L93 Difference]: Finished difference Result 2498 states and 10814 transitions. [2022-03-01 17:49:30,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:49:30,430 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:30,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:30,436 INFO L225 Difference]: With dead ends: 2498 [2022-03-01 17:49:30,437 INFO L226 Difference]: Without dead ends: 2479 [2022-03-01 17:49:30,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:49:30,437 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 230 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:30,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 328 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:49:30,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2022-03-01 17:49:30,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 2174. [2022-03-01 17:49:30,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 2173 states have (on average 4.453750575241601) internal successors, (9678), 2173 states have internal predecessors, (9678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:30,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 9678 transitions. [2022-03-01 17:49:30,472 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 9678 transitions. Word has length 29 [2022-03-01 17:49:30,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:30,472 INFO L470 AbstractCegarLoop]: Abstraction has 2174 states and 9678 transitions. [2022-03-01 17:49:30,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:30,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 9678 transitions. [2022-03-01 17:49:30,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:30,476 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:30,476 INFO L514 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] [2022-03-01 17:49:30,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-01 17:49:30,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:30,692 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:30,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:30,692 INFO L85 PathProgramCache]: Analyzing trace with hash 319971865, now seen corresponding path program 4 times [2022-03-01 17:49:30,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:30,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678191083] [2022-03-01 17:49:30,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:30,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:30,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:30,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:30,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678191083] [2022-03-01 17:49:30,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678191083] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:30,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469981975] [2022-03-01 17:49:30,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:49:30,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:30,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:30,810 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) [2022-03-01 17:49:30,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-01 17:49:30,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:49:30,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:30,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:30,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:31,032 INFO L387 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 19 treesize of output 11 [2022-03-01 17:49:31,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:31,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:31,273 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:31,273 INFO L387 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 17 treesize of output 22 [2022-03-01 17:49:31,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:31,283 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:49:31,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:31,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469981975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:31,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:31,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:49:31,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845476465] [2022-03-01 17:49:31,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:31,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:49:31,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:31,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:49:31,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:31,317 INFO L87 Difference]: Start difference. First operand 2174 states and 9678 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:32,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:32,035 INFO L93 Difference]: Finished difference Result 3172 states and 13428 transitions. [2022-03-01 17:49:32,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:49:32,035 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:32,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:32,043 INFO L225 Difference]: With dead ends: 3172 [2022-03-01 17:49:32,043 INFO L226 Difference]: Without dead ends: 3144 [2022-03-01 17:49:32,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:49:32,044 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 366 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:32,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 456 Invalid, 1525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:49:32,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2022-03-01 17:49:32,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 2296. [2022-03-01 17:49:32,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2295 states have (on average 4.484967320261438) internal successors, (10293), 2295 states have internal predecessors, (10293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:32,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 10293 transitions. [2022-03-01 17:49:32,090 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 10293 transitions. Word has length 29 [2022-03-01 17:49:32,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:32,090 INFO L470 AbstractCegarLoop]: Abstraction has 2296 states and 10293 transitions. [2022-03-01 17:49:32,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:32,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 10293 transitions. [2022-03-01 17:49:32,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:32,095 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:32,095 INFO L514 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] [2022-03-01 17:49:32,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:32,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-01 17:49:32,310 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:32,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:32,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1267603755, now seen corresponding path program 2 times [2022-03-01 17:49:32,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:32,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354766018] [2022-03-01 17:49:32,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:32,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:32,392 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:32,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354766018] [2022-03-01 17:49:32,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354766018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:32,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740808713] [2022-03-01 17:49:32,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:49:32,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:32,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:32,394 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) [2022-03-01 17:49:32,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-01 17:49:32,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:32,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:32,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:32,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:32,563 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:32,563 INFO L387 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 15 treesize of output 19 [2022-03-01 17:49:32,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:32,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:32,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:32,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740808713] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:32,796 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:32,797 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-01 17:49:32,797 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583481999] [2022-03-01 17:49:32,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:32,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:49:32,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:32,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:49:32,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:32,797 INFO L87 Difference]: Start difference. First operand 2296 states and 10293 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:33,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:33,217 INFO L93 Difference]: Finished difference Result 2614 states and 11429 transitions. [2022-03-01 17:49:33,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:49:33,218 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:33,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:33,225 INFO L225 Difference]: With dead ends: 2614 [2022-03-01 17:49:33,225 INFO L226 Difference]: Without dead ends: 2595 [2022-03-01 17:49:33,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:49:33,225 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 135 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:33,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 373 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:49:33,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2022-03-01 17:49:33,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 2299. [2022-03-01 17:49:33,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2298 states have (on average 4.483028720626632) internal successors, (10302), 2298 states have internal predecessors, (10302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:33,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 10302 transitions. [2022-03-01 17:49:33,265 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 10302 transitions. Word has length 29 [2022-03-01 17:49:33,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:33,266 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 10302 transitions. [2022-03-01 17:49:33,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:33,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 10302 transitions. [2022-03-01 17:49:33,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:33,270 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:33,270 INFO L514 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] [2022-03-01 17:49:33,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:33,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:33,485 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:33,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:33,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1477728721, now seen corresponding path program 3 times [2022-03-01 17:49:33,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:33,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259871643] [2022-03-01 17:49:33,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:33,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:33,590 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:33,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259871643] [2022-03-01 17:49:33,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259871643] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:33,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017655811] [2022-03-01 17:49:33,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:49:33,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:33,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:33,600 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) [2022-03-01 17:49:33,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-01 17:49:33,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:49:33,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:33,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:33,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:33,857 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:33,857 INFO L387 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 16 treesize of output 20 [2022-03-01 17:49:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:33,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:34,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:34,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017655811] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:34,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:34,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-01 17:49:34,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705710410] [2022-03-01 17:49:34,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:34,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:49:34,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:34,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:49:34,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:34,098 INFO L87 Difference]: Start difference. First operand 2299 states and 10302 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:34,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:34,510 INFO L93 Difference]: Finished difference Result 2653 states and 11530 transitions. [2022-03-01 17:49:34,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:49:34,510 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:34,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:34,517 INFO L225 Difference]: With dead ends: 2653 [2022-03-01 17:49:34,517 INFO L226 Difference]: Without dead ends: 2634 [2022-03-01 17:49:34,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:49:34,518 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 210 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:34,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 327 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:49:34,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2022-03-01 17:49:34,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 2299. [2022-03-01 17:49:34,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2298 states have (on average 4.483028720626632) internal successors, (10302), 2298 states have internal predecessors, (10302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:34,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 10302 transitions. [2022-03-01 17:49:34,560 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 10302 transitions. Word has length 29 [2022-03-01 17:49:34,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:34,560 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 10302 transitions. [2022-03-01 17:49:34,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:34,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 10302 transitions. [2022-03-01 17:49:34,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:34,564 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:34,564 INFO L514 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] [2022-03-01 17:49:34,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:34,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:34,779 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:34,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:34,779 INFO L85 PathProgramCache]: Analyzing trace with hash -55373895, now seen corresponding path program 4 times [2022-03-01 17:49:34,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:34,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765785959] [2022-03-01 17:49:34,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:34,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:34,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:34,853 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:34,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765785959] [2022-03-01 17:49:34,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765785959] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:34,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504086055] [2022-03-01 17:49:34,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:49:34,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:34,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:34,855 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) [2022-03-01 17:49:34,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-01 17:49:34,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:49:34,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:34,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:34,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:35,021 INFO L387 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 19 treesize of output 11 [2022-03-01 17:49:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:35,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:35,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:35,198 INFO L387 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 17 treesize of output 22 [2022-03-01 17:49:35,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:35,208 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:49:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:35,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504086055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:35,240 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:35,240 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:49:35,240 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300797142] [2022-03-01 17:49:35,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:35,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:49:35,240 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:35,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:49:35,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:35,241 INFO L87 Difference]: Start difference. First operand 2299 states and 10302 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:36,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:36,157 INFO L93 Difference]: Finished difference Result 3425 states and 14506 transitions. [2022-03-01 17:49:36,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:49:36,157 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:36,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:36,166 INFO L225 Difference]: With dead ends: 3425 [2022-03-01 17:49:36,166 INFO L226 Difference]: Without dead ends: 3397 [2022-03-01 17:49:36,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:49:36,166 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 336 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:36,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 545 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:49:36,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3397 states. [2022-03-01 17:49:36,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3397 to 2390. [2022-03-01 17:49:36,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 4.50188363331938) internal successors, (10755), 2389 states have internal predecessors, (10755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:36,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 10755 transitions. [2022-03-01 17:49:36,222 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 10755 transitions. Word has length 29 [2022-03-01 17:49:36,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:36,222 INFO L470 AbstractCegarLoop]: Abstraction has 2390 states and 10755 transitions. [2022-03-01 17:49:36,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:36,222 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 10755 transitions. [2022-03-01 17:49:36,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:36,227 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:36,228 INFO L514 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] [2022-03-01 17:49:36,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:36,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-03-01 17:49:36,441 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:36,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:36,442 INFO L85 PathProgramCache]: Analyzing trace with hash 11294687, now seen corresponding path program 5 times [2022-03-01 17:49:36,442 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:36,442 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870282689] [2022-03-01 17:49:36,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:36,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:36,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:36,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:36,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:36,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870282689] [2022-03-01 17:49:36,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870282689] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:36,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026932492] [2022-03-01 17:49:36,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:49:36,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:36,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:36,572 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) [2022-03-01 17:49:36,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-01 17:49:36,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:36,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:36,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:49:36,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:36,777 INFO L387 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 19 treesize of output 11 [2022-03-01 17:49:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:36,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:37,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:37,032 INFO L387 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 17 treesize of output 22 [2022-03-01 17:49:37,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:37,042 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:49:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:37,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026932492] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:37,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:37,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-01 17:49:37,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223562524] [2022-03-01 17:49:37,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:37,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:49:37,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:37,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:49:37,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:49:37,075 INFO L87 Difference]: Start difference. First operand 2390 states and 10755 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:38,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:38,234 INFO L93 Difference]: Finished difference Result 3525 states and 14857 transitions. [2022-03-01 17:49:38,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:49:38,234 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:38,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:38,244 INFO L225 Difference]: With dead ends: 3525 [2022-03-01 17:49:38,244 INFO L226 Difference]: Without dead ends: 3452 [2022-03-01 17:49:38,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=214, Invalid=1508, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:49:38,246 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 477 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 1991 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 2065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:38,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 593 Invalid, 2065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1991 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 17:49:38,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3452 states. [2022-03-01 17:49:38,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3452 to 2361. [2022-03-01 17:49:38,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2360 states have (on average 4.497457627118644) internal successors, (10614), 2360 states have internal predecessors, (10614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:38,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 10614 transitions. [2022-03-01 17:49:38,294 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 10614 transitions. Word has length 29 [2022-03-01 17:49:38,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:38,294 INFO L470 AbstractCegarLoop]: Abstraction has 2361 states and 10614 transitions. [2022-03-01 17:49:38,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:38,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 10614 transitions. [2022-03-01 17:49:38,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:38,299 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:38,299 INFO L514 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] [2022-03-01 17:49:38,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:38,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:38,516 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:38,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:38,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1417591807, now seen corresponding path program 5 times [2022-03-01 17:49:38,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:38,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830965714] [2022-03-01 17:49:38,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:38,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:38,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:38,585 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:38,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830965714] [2022-03-01 17:49:38,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830965714] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:38,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197017837] [2022-03-01 17:49:38,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:49:38,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:38,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:38,586 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) [2022-03-01 17:49:38,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-01 17:49:38,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:38,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:38,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-01 17:49:38,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:38,701 INFO L387 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 19 treesize of output 11 [2022-03-01 17:49:38,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:38,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:38,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:38,949 INFO L387 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 17 treesize of output 22 [2022-03-01 17:49:38,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:38,958 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:49:38,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:38,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197017837] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:38,989 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:38,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 17:49:38,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724854435] [2022-03-01 17:49:38,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:38,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:49:38,990 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:38,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:49:38,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:49:38,990 INFO L87 Difference]: Start difference. First operand 2361 states and 10614 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:39,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:39,913 INFO L93 Difference]: Finished difference Result 3500 states and 14724 transitions. [2022-03-01 17:49:39,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:49:39,914 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:39,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:39,923 INFO L225 Difference]: With dead ends: 3500 [2022-03-01 17:49:39,923 INFO L226 Difference]: Without dead ends: 3446 [2022-03-01 17:49:39,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=1290, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:49:39,923 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 527 mSDsluCounter, 1213 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:39,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 476 Invalid, 1622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1542 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:49:39,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2022-03-01 17:49:39,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2300. [2022-03-01 17:49:39,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2299 states have (on average 4.5045672031317965) internal successors, (10356), 2299 states have internal predecessors, (10356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:39,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 10356 transitions. [2022-03-01 17:49:39,971 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 10356 transitions. Word has length 29 [2022-03-01 17:49:39,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:39,971 INFO L470 AbstractCegarLoop]: Abstraction has 2300 states and 10356 transitions. [2022-03-01 17:49:39,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:39,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 10356 transitions. [2022-03-01 17:49:39,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:39,976 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:39,976 INFO L514 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] [2022-03-01 17:49:39,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-01 17:49:40,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:40,189 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:40,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:40,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1130286919, now seen corresponding path program 6 times [2022-03-01 17:49:40,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:40,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770536551] [2022-03-01 17:49:40,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:40,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:40,319 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:40,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770536551] [2022-03-01 17:49:40,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770536551] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:40,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573615206] [2022-03-01 17:49:40,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:49:40,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:40,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:40,321 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) [2022-03-01 17:49:40,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-01 17:49:40,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:49:40,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:40,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:40,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:40,483 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:40,483 INFO L387 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 [2022-03-01 17:49:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:40,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:40,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573615206] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:40,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:40,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-01 17:49:40,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452069372] [2022-03-01 17:49:40,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:40,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:49:40,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:40,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:49:40,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:49:40,735 INFO L87 Difference]: Start difference. First operand 2300 states and 10356 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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) [2022-03-01 17:49:41,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:41,221 INFO L93 Difference]: Finished difference Result 2715 states and 11861 transitions. [2022-03-01 17:49:41,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:49:41,221 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 29 [2022-03-01 17:49:41,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:41,229 INFO L225 Difference]: With dead ends: 2715 [2022-03-01 17:49:41,229 INFO L226 Difference]: Without dead ends: 2696 [2022-03-01 17:49:41,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:49:41,230 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 365 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:41,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 320 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:49:41,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2022-03-01 17:49:41,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2350. [2022-03-01 17:49:41,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2350 states, 2349 states have (on average 4.5053214133673904) internal successors, (10583), 2349 states have internal predecessors, (10583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:41,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 10583 transitions. [2022-03-01 17:49:41,273 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 10583 transitions. Word has length 29 [2022-03-01 17:49:41,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:41,273 INFO L470 AbstractCegarLoop]: Abstraction has 2350 states and 10583 transitions. [2022-03-01 17:49:41,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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) [2022-03-01 17:49:41,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 10583 transitions. [2022-03-01 17:49:41,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:41,277 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:41,277 INFO L514 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] [2022-03-01 17:49:41,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:41,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:41,493 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:41,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:41,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1861407771, now seen corresponding path program 7 times [2022-03-01 17:49:41,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:41,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994129019] [2022-03-01 17:49:41,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:41,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:41,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:41,603 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:41,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994129019] [2022-03-01 17:49:41,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994129019] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:41,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530493091] [2022-03-01 17:49:41,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:49:41,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:41,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:41,605 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) [2022-03-01 17:49:41,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-01 17:49:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:41,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:41,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:41,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:49:41,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:41,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:41,955 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:41,956 INFO L387 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 17 treesize of output 22 [2022-03-01 17:49:41,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:41,967 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:49:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:42,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530493091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:42,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:42,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:49:42,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600396289] [2022-03-01 17:49:42,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:42,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:49:42,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:42,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:49:42,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:42,002 INFO L87 Difference]: Start difference. First operand 2350 states and 10583 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:42,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:42,686 INFO L93 Difference]: Finished difference Result 3293 states and 14031 transitions. [2022-03-01 17:49:42,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:49:42,686 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:42,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:42,694 INFO L225 Difference]: With dead ends: 3293 [2022-03-01 17:49:42,694 INFO L226 Difference]: Without dead ends: 3265 [2022-03-01 17:49:42,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:49:42,695 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 400 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:42,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 418 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:49:42,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3265 states. [2022-03-01 17:49:42,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3265 to 2460. [2022-03-01 17:49:42,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 2459 states have (on average 4.513623424156161) internal successors, (11099), 2459 states have internal predecessors, (11099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:42,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 11099 transitions. [2022-03-01 17:49:42,743 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 11099 transitions. Word has length 29 [2022-03-01 17:49:42,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:42,743 INFO L470 AbstractCegarLoop]: Abstraction has 2460 states and 11099 transitions. [2022-03-01 17:49:42,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:42,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 11099 transitions. [2022-03-01 17:49:42,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:42,747 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:42,747 INFO L514 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] [2022-03-01 17:49:42,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:42,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-01 17:49:42,963 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:42,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:42,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1914794291, now seen corresponding path program 8 times [2022-03-01 17:49:42,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:42,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785900201] [2022-03-01 17:49:42,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:42,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:42,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:43,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:43,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785900201] [2022-03-01 17:49:43,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785900201] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:43,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456781896] [2022-03-01 17:49:43,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:49:43,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:43,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:43,048 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) [2022-03-01 17:49:43,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-01 17:49:43,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:43,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:43,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:43,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:43,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:43,166 INFO L387 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 [2022-03-01 17:49:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:43,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:43,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456781896] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:43,396 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:43,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-03-01 17:49:43,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577696284] [2022-03-01 17:49:43,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:43,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:49:43,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:43,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:49:43,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:43,397 INFO L87 Difference]: Start difference. First operand 2460 states and 11099 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:43,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:43,762 INFO L93 Difference]: Finished difference Result 2720 states and 12010 transitions. [2022-03-01 17:49:43,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:49:43,762 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:43,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:43,772 INFO L225 Difference]: With dead ends: 2720 [2022-03-01 17:49:43,772 INFO L226 Difference]: Without dead ends: 2697 [2022-03-01 17:49:43,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:49:43,773 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 385 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:43,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 230 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:49:43,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2697 states. [2022-03-01 17:49:43,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2697 to 2404. [2022-03-01 17:49:43,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2404 states, 2403 states have (on average 4.516437786100707) internal successors, (10853), 2403 states have internal predecessors, (10853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:43,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2404 states to 2404 states and 10853 transitions. [2022-03-01 17:49:43,819 INFO L78 Accepts]: Start accepts. Automaton has 2404 states and 10853 transitions. Word has length 29 [2022-03-01 17:49:43,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:43,820 INFO L470 AbstractCegarLoop]: Abstraction has 2404 states and 10853 transitions. [2022-03-01 17:49:43,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:43,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2404 states and 10853 transitions. [2022-03-01 17:49:43,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:43,825 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:43,825 INFO L514 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] [2022-03-01 17:49:43,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:44,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:44,031 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:44,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:44,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1843632387, now seen corresponding path program 9 times [2022-03-01 17:49:44,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:44,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803174038] [2022-03-01 17:49:44,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:44,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:44,169 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:44,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803174038] [2022-03-01 17:49:44,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803174038] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:44,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150670201] [2022-03-01 17:49:44,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:49:44,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:44,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:44,170 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) [2022-03-01 17:49:44,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-01 17:49:44,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:49:44,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:44,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:44,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:44,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:44,332 INFO L387 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 [2022-03-01 17:49:44,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:44,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:44,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150670201] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:44,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:44,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-01 17:49:44,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611192397] [2022-03-01 17:49:44,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:44,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:49:44,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:44,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:49:44,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:49:44,737 INFO L87 Difference]: Start difference. First operand 2404 states and 10853 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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) [2022-03-01 17:49:45,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:45,169 INFO L93 Difference]: Finished difference Result 2552 states and 11385 transitions. [2022-03-01 17:49:45,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:49:45,169 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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 29 [2022-03-01 17:49:45,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:45,176 INFO L225 Difference]: With dead ends: 2552 [2022-03-01 17:49:45,176 INFO L226 Difference]: Without dead ends: 2533 [2022-03-01 17:49:45,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:49:45,176 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 124 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:45,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 347 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:49:45,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2022-03-01 17:49:45,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2404. [2022-03-01 17:49:45,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2404 states, 2403 states have (on average 4.516437786100707) internal successors, (10853), 2403 states have internal predecessors, (10853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:45,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2404 states to 2404 states and 10853 transitions. [2022-03-01 17:49:45,217 INFO L78 Accepts]: Start accepts. Automaton has 2404 states and 10853 transitions. Word has length 29 [2022-03-01 17:49:45,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:45,218 INFO L470 AbstractCegarLoop]: Abstraction has 2404 states and 10853 transitions. [2022-03-01 17:49:45,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 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) [2022-03-01 17:49:45,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2404 states and 10853 transitions. [2022-03-01 17:49:45,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:45,222 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:45,222 INFO L514 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] [2022-03-01 17:49:45,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-01 17:49:45,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:45,438 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:45,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:45,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1280034963, now seen corresponding path program 10 times [2022-03-01 17:49:45,439 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:45,439 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436690716] [2022-03-01 17:49:45,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:45,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:45,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:45,525 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:45,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436690716] [2022-03-01 17:49:45,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436690716] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:45,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968936848] [2022-03-01 17:49:45,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:49:45,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:45,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:45,527 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) [2022-03-01 17:49:45,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-01 17:49:45,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:49:45,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:45,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:45,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:45,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:49:45,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:45,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:45,884 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:45,884 INFO L387 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 17 treesize of output 22 [2022-03-01 17:49:45,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:45,893 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:49:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:45,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968936848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:45,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:45,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 17:49:45,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166801517] [2022-03-01 17:49:45,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:45,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:49:45,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:45,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:49:45,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:49:45,923 INFO L87 Difference]: Start difference. First operand 2404 states and 10853 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:46,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:46,728 INFO L93 Difference]: Finished difference Result 3157 states and 13499 transitions. [2022-03-01 17:49:46,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:49:46,728 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:46,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:46,736 INFO L225 Difference]: With dead ends: 3157 [2022-03-01 17:49:46,736 INFO L226 Difference]: Without dead ends: 3115 [2022-03-01 17:49:46,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:49:46,736 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 487 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:46,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 377 Invalid, 1245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:49:46,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2022-03-01 17:49:46,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 2389. [2022-03-01 17:49:46,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2389 states, 2388 states have (on average 4.516331658291457) internal successors, (10785), 2388 states have internal predecessors, (10785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:46,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 10785 transitions. [2022-03-01 17:49:46,775 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 10785 transitions. Word has length 29 [2022-03-01 17:49:46,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:46,775 INFO L470 AbstractCegarLoop]: Abstraction has 2389 states and 10785 transitions. [2022-03-01 17:49:46,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:46,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 10785 transitions. [2022-03-01 17:49:46,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:46,779 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:46,779 INFO L514 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] [2022-03-01 17:49:46,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:46,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-03-01 17:49:46,994 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:46,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:46,994 INFO L85 PathProgramCache]: Analyzing trace with hash -109274557, now seen corresponding path program 11 times [2022-03-01 17:49:46,995 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:46,995 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680213106] [2022-03-01 17:49:46,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:46,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:46,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:47,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:47,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680213106] [2022-03-01 17:49:47,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680213106] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:47,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638418023] [2022-03-01 17:49:47,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:49:47,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:47,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:47,115 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) [2022-03-01 17:49:47,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-01 17:49:47,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:49:47,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:47,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:47,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:47,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:49:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:47,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:47,544 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:47,544 INFO L387 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 17 treesize of output 22 [2022-03-01 17:49:47,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:47,553 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:49:47,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:47,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638418023] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:47,584 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:47,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 17:49:47,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803392821] [2022-03-01 17:49:47,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:47,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:49:47,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:47,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:49:47,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:49:47,585 INFO L87 Difference]: Start difference. First operand 2389 states and 10785 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:48,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:48,540 INFO L93 Difference]: Finished difference Result 3246 states and 13969 transitions. [2022-03-01 17:49:48,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:49:48,540 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:48,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:48,548 INFO L225 Difference]: With dead ends: 3246 [2022-03-01 17:49:48,548 INFO L226 Difference]: Without dead ends: 3208 [2022-03-01 17:49:48,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=258, Invalid=1148, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:49:48,549 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 404 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:48,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 428 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1461 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:49:48,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3208 states. [2022-03-01 17:49:48,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3208 to 2531. [2022-03-01 17:49:48,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 2530 states have (on average 4.519762845849803) internal successors, (11435), 2530 states have internal predecessors, (11435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:48,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 11435 transitions. [2022-03-01 17:49:48,590 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 11435 transitions. Word has length 29 [2022-03-01 17:49:48,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:48,590 INFO L470 AbstractCegarLoop]: Abstraction has 2531 states and 11435 transitions. [2022-03-01 17:49:48,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:48,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 11435 transitions. [2022-03-01 17:49:48,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:48,594 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:48,594 INFO L514 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] [2022-03-01 17:49:48,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:48,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:48,794 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:48,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:48,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1193998049, now seen corresponding path program 12 times [2022-03-01 17:49:48,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:48,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547440891] [2022-03-01 17:49:48,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:48,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:48,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:48,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:48,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547440891] [2022-03-01 17:49:48,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547440891] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:48,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986203029] [2022-03-01 17:49:48,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:49:48,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:48,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:48,904 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) [2022-03-01 17:49:48,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-01 17:49:48,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:49:48,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:48,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 17:49:48,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:49,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:49,039 INFO L387 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 [2022-03-01 17:49:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:49,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:49,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986203029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:49,354 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:49,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 18 [2022-03-01 17:49:49,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114612149] [2022-03-01 17:49:49,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:49,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:49:49,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:49,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:49:49,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:49:49,355 INFO L87 Difference]: Start difference. First operand 2531 states and 11435 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:49,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:49,710 INFO L93 Difference]: Finished difference Result 2757 states and 12227 transitions. [2022-03-01 17:49:49,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:49:49,711 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:49,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:49,718 INFO L225 Difference]: With dead ends: 2757 [2022-03-01 17:49:49,718 INFO L226 Difference]: Without dead ends: 2744 [2022-03-01 17:49:49,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:49:49,718 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 184 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:49,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 244 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:49:49,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2022-03-01 17:49:49,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2531. [2022-03-01 17:49:49,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 2530 states have (on average 4.518577075098814) internal successors, (11432), 2530 states have internal predecessors, (11432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:49,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 11432 transitions. [2022-03-01 17:49:49,788 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 11432 transitions. Word has length 29 [2022-03-01 17:49:49,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:49,788 INFO L470 AbstractCegarLoop]: Abstraction has 2531 states and 11432 transitions. [2022-03-01 17:49:49,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:49,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 11432 transitions. [2022-03-01 17:49:49,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:49,793 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:49,793 INFO L514 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] [2022-03-01 17:49:49,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:50,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:50,011 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:50,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:50,012 INFO L85 PathProgramCache]: Analyzing trace with hash 294635977, now seen corresponding path program 13 times [2022-03-01 17:49:50,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:50,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714574435] [2022-03-01 17:49:50,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:50,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:50,132 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:50,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714574435] [2022-03-01 17:49:50,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714574435] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:50,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210471430] [2022-03-01 17:49:50,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:49:50,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:50,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:50,133 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) [2022-03-01 17:49:50,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-01 17:49:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:50,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:50,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:50,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:49:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:50,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:50,510 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:50,510 INFO L387 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 17 treesize of output 22 [2022-03-01 17:49:50,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:50,518 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:49:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:50,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210471430] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:50,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:50,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 17:49:50,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529362114] [2022-03-01 17:49:50,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:50,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:49:50,544 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:50,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:49:50,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:49:50,550 INFO L87 Difference]: Start difference. First operand 2531 states and 11432 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:51,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:51,492 INFO L93 Difference]: Finished difference Result 3306 states and 14104 transitions. [2022-03-01 17:49:51,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:49:51,492 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:51,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:51,500 INFO L225 Difference]: With dead ends: 3306 [2022-03-01 17:49:51,500 INFO L226 Difference]: Without dead ends: 3263 [2022-03-01 17:49:51,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:49:51,501 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 508 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:51,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 458 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:49:51,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3263 states. [2022-03-01 17:49:51,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3263 to 2477. [2022-03-01 17:49:51,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 4.520193861066236) internal successors, (11192), 2476 states have internal predecessors, (11192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:51,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 11192 transitions. [2022-03-01 17:49:51,545 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 11192 transitions. Word has length 29 [2022-03-01 17:49:51,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:51,545 INFO L470 AbstractCegarLoop]: Abstraction has 2477 states and 11192 transitions. [2022-03-01 17:49:51,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:51,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 11192 transitions. [2022-03-01 17:49:51,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:51,550 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:51,550 INFO L514 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] [2022-03-01 17:49:51,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:51,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:51,765 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:51,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:51,765 INFO L85 PathProgramCache]: Analyzing trace with hash -565478263, now seen corresponding path program 14 times [2022-03-01 17:49:51,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:51,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981025671] [2022-03-01 17:49:51,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:51,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:51,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:51,883 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:51,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981025671] [2022-03-01 17:49:51,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981025671] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:51,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595255335] [2022-03-01 17:49:51,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:49:51,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:51,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:51,884 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) [2022-03-01 17:49:51,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-01 17:49:51,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:51,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:51,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:51,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:52,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:49:52,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:52,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:52,277 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:52,277 INFO L387 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 17 treesize of output 22 [2022-03-01 17:49:52,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:52,286 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:49:52,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:52,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595255335] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:52,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:52,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-01 17:49:52,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681888113] [2022-03-01 17:49:52,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:52,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:49:52,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:52,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:49:52,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:49:52,340 INFO L87 Difference]: Start difference. First operand 2477 states and 11192 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:53,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:53,410 INFO L93 Difference]: Finished difference Result 3069 states and 13302 transitions. [2022-03-01 17:49:53,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:49:53,414 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:53,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:53,422 INFO L225 Difference]: With dead ends: 3069 [2022-03-01 17:49:53,422 INFO L226 Difference]: Without dead ends: 3039 [2022-03-01 17:49:53,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:49:53,422 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 331 mSDsluCounter, 1734 mSDsCounter, 0 mSdLazyCounter, 2203 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:53,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 714 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2203 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 17:49:53,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3039 states. [2022-03-01 17:49:53,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3039 to 2486. [2022-03-01 17:49:53,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 4.513480885311871) internal successors, (11216), 2485 states have internal predecessors, (11216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:53,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 11216 transitions. [2022-03-01 17:49:53,464 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 11216 transitions. Word has length 29 [2022-03-01 17:49:53,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:53,465 INFO L470 AbstractCegarLoop]: Abstraction has 2486 states and 11216 transitions. [2022-03-01 17:49:53,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:53,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 11216 transitions. [2022-03-01 17:49:53,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:53,469 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:53,469 INFO L514 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] [2022-03-01 17:49:53,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:53,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-03-01 17:49:53,677 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:53,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:53,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1979344029, now seen corresponding path program 6 times [2022-03-01 17:49:53,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:53,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805874297] [2022-03-01 17:49:53,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:53,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:53,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:53,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:53,807 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:53,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805874297] [2022-03-01 17:49:53,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805874297] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:53,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556285600] [2022-03-01 17:49:53,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:49:53,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:53,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:53,811 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) [2022-03-01 17:49:53,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-01 17:49:53,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:49:53,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:53,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 17:49:53,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:53,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:53,936 INFO L387 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 [2022-03-01 17:49:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:54,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:54,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556285600] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:54,273 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:54,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-03-01 17:49:54,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611771873] [2022-03-01 17:49:54,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:54,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:49:54,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:54,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:49:54,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:49:54,274 INFO L87 Difference]: Start difference. First operand 2486 states and 11216 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:54,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:54,661 INFO L93 Difference]: Finished difference Result 2894 states and 12763 transitions. [2022-03-01 17:49:54,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:49:54,661 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:54,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:54,668 INFO L225 Difference]: With dead ends: 2894 [2022-03-01 17:49:54,668 INFO L226 Difference]: Without dead ends: 2875 [2022-03-01 17:49:54,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:49:54,669 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 225 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:54,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 238 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:49:54,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2022-03-01 17:49:54,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2540. [2022-03-01 17:49:54,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 4.508467900748326) internal successors, (11447), 2539 states have internal predecessors, (11447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:54,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 11447 transitions. [2022-03-01 17:49:54,712 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 11447 transitions. Word has length 29 [2022-03-01 17:49:54,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:54,713 INFO L470 AbstractCegarLoop]: Abstraction has 2540 states and 11447 transitions. [2022-03-01 17:49:54,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:54,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 11447 transitions. [2022-03-01 17:49:54,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:54,735 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:54,735 INFO L514 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] [2022-03-01 17:49:54,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:54,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:54,950 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:54,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:54,951 INFO L85 PathProgramCache]: Analyzing trace with hash -556989203, now seen corresponding path program 7 times [2022-03-01 17:49:54,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:54,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279290049] [2022-03-01 17:49:54,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:54,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:54,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:55,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:55,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279290049] [2022-03-01 17:49:55,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279290049] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:55,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489707457] [2022-03-01 17:49:55,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:49:55,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:55,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:55,048 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) [2022-03-01 17:49:55,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-01 17:49:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:55,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:55,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:55,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:49:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:55,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:55,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:55,475 INFO L387 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 17 treesize of output 22 [2022-03-01 17:49:55,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:55,484 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:49:55,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:55,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489707457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:55,514 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:55,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:49:55,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146296040] [2022-03-01 17:49:55,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:55,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:49:55,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:55,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:49:55,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:55,515 INFO L87 Difference]: Start difference. First operand 2540 states and 11447 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:56,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:56,256 INFO L93 Difference]: Finished difference Result 3497 states and 14957 transitions. [2022-03-01 17:49:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:49:56,256 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:56,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:56,264 INFO L225 Difference]: With dead ends: 3497 [2022-03-01 17:49:56,265 INFO L226 Difference]: Without dead ends: 3469 [2022-03-01 17:49:56,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:49:56,265 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 377 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:56,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 382 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:49:56,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2022-03-01 17:49:56,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 2669. [2022-03-01 17:49:56,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2669 states, 2668 states have (on average 4.508620689655173) internal successors, (12029), 2668 states have internal predecessors, (12029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:56,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2669 states to 2669 states and 12029 transitions. [2022-03-01 17:49:56,313 INFO L78 Accepts]: Start accepts. Automaton has 2669 states and 12029 transitions. Word has length 29 [2022-03-01 17:49:56,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:56,313 INFO L470 AbstractCegarLoop]: Abstraction has 2669 states and 12029 transitions. [2022-03-01 17:49:56,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:56,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2669 states and 12029 transitions. [2022-03-01 17:49:56,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:56,317 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:56,318 INFO L514 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] [2022-03-01 17:49:56,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:56,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:56,529 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:56,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:56,529 INFO L85 PathProgramCache]: Analyzing trace with hash -156115671, now seen corresponding path program 8 times [2022-03-01 17:49:56,529 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:56,529 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90462724] [2022-03-01 17:49:56,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:56,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:56,642 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:56,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90462724] [2022-03-01 17:49:56,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90462724] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:56,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291694018] [2022-03-01 17:49:56,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:49:56,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:56,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:56,668 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) [2022-03-01 17:49:56,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-01 17:49:56,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:49:56,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:56,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:56,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:56,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:56,800 INFO L387 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 [2022-03-01 17:49:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:56,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:57,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291694018] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:57,050 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:57,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-03-01 17:49:57,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761537725] [2022-03-01 17:49:57,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:57,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:49:57,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:57,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:49:57,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:57,050 INFO L87 Difference]: Start difference. First operand 2669 states and 12029 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:57,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:57,571 INFO L93 Difference]: Finished difference Result 2976 states and 13095 transitions. [2022-03-01 17:49:57,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:49:57,571 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:49:57,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:57,578 INFO L225 Difference]: With dead ends: 2976 [2022-03-01 17:49:57,578 INFO L226 Difference]: Without dead ends: 2953 [2022-03-01 17:49:57,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:49:57,578 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 281 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:57,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 268 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:49:57,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2022-03-01 17:49:57,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 2597. [2022-03-01 17:49:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 2596 states have (on average 4.510015408320493) internal successors, (11708), 2596 states have internal predecessors, (11708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:57,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 11708 transitions. [2022-03-01 17:49:57,618 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 11708 transitions. Word has length 29 [2022-03-01 17:49:57,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:57,618 INFO L470 AbstractCegarLoop]: Abstraction has 2597 states and 11708 transitions. [2022-03-01 17:49:57,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:57,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 11708 transitions. [2022-03-01 17:49:57,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:57,622 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:57,622 INFO L514 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] [2022-03-01 17:49:57,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:57,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-03-01 17:49:57,838 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:57,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:57,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1075204841, now seen corresponding path program 9 times [2022-03-01 17:49:57,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:57,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463377925] [2022-03-01 17:49:57,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:57,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:57,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:57,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:57,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463377925] [2022-03-01 17:49:57,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463377925] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:57,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184239049] [2022-03-01 17:49:57,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:49:57,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:57,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:57,995 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) [2022-03-01 17:49:58,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-01 17:49:58,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:49:58,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:58,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 17:49:58,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:58,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:58,129 INFO L387 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 [2022-03-01 17:49:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:58,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:58,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:58,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184239049] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:58,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:58,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-03-01 17:49:58,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920597923] [2022-03-01 17:49:58,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:58,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:49:58,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:58,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:49:58,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:49:58,508 INFO L87 Difference]: Start difference. First operand 2597 states and 11708 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) [2022-03-01 17:49:58,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:49:58,922 INFO L93 Difference]: Finished difference Result 2734 states and 12196 transitions. [2022-03-01 17:49:58,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:49:58,922 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 [2022-03-01 17:49:58,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:49:58,929 INFO L225 Difference]: With dead ends: 2734 [2022-03-01 17:49:58,930 INFO L226 Difference]: Without dead ends: 2719 [2022-03-01 17:49:58,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:49:58,930 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 73 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:49:58,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 288 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:49:58,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2022-03-01 17:49:58,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 2597. [2022-03-01 17:49:58,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 2596 states have (on average 4.510015408320493) internal successors, (11708), 2596 states have internal predecessors, (11708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:49:58,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 11708 transitions. [2022-03-01 17:49:58,973 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 11708 transitions. Word has length 29 [2022-03-01 17:49:58,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:49:58,974 INFO L470 AbstractCegarLoop]: Abstraction has 2597 states and 11708 transitions. [2022-03-01 17:49:58,974 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) [2022-03-01 17:49:58,974 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 11708 transitions. [2022-03-01 17:49:58,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:49:58,980 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:49:58,980 INFO L514 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] [2022-03-01 17:49:58,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-01 17:49:59,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:59,196 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:49:59,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:49:59,196 INFO L85 PathProgramCache]: Analyzing trace with hash -558108055, now seen corresponding path program 10 times [2022-03-01 17:49:59,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:49:59,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298924621] [2022-03-01 17:49:59,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:49:59,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:49:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:49:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:59,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:49:59,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298924621] [2022-03-01 17:49:59,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298924621] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:49:59,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134723589] [2022-03-01 17:49:59,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:49:59,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:49:59,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:49:59,297 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) [2022-03-01 17:49:59,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-01 17:49:59,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:49:59,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:49:59,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:49:59,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:49:59,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:49:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:59,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:49:59,703 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:49:59,704 INFO L387 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 17 treesize of output 22 [2022-03-01 17:49:59,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:49:59,713 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:49:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:49:59,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134723589] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:49:59,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:49:59,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:49:59,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049029631] [2022-03-01 17:49:59,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:49:59,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:49:59,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:49:59,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:49:59,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:49:59,744 INFO L87 Difference]: Start difference. First operand 2597 states and 11708 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:00,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:00,372 INFO L93 Difference]: Finished difference Result 3239 states and 14015 transitions. [2022-03-01 17:50:00,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:50:00,372 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:00,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:00,380 INFO L225 Difference]: With dead ends: 3239 [2022-03-01 17:50:00,380 INFO L226 Difference]: Without dead ends: 3215 [2022-03-01 17:50:00,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:50:00,381 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 382 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:00,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 412 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:50:00,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2022-03-01 17:50:00,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 2590. [2022-03-01 17:50:00,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2590 states, 2589 states have (on average 4.511780610274237) internal successors, (11681), 2589 states have internal predecessors, (11681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:00,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2590 states to 2590 states and 11681 transitions. [2022-03-01 17:50:00,427 INFO L78 Accepts]: Start accepts. Automaton has 2590 states and 11681 transitions. Word has length 29 [2022-03-01 17:50:00,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:00,427 INFO L470 AbstractCegarLoop]: Abstraction has 2590 states and 11681 transitions. [2022-03-01 17:50:00,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:00,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2590 states and 11681 transitions. [2022-03-01 17:50:00,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:00,432 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:00,432 INFO L514 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] [2022-03-01 17:50:00,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:00,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:00,644 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:00,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:00,644 INFO L85 PathProgramCache]: Analyzing trace with hash -731434137, now seen corresponding path program 11 times [2022-03-01 17:50:00,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:00,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379070231] [2022-03-01 17:50:00,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:00,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:00,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:00,773 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:00,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379070231] [2022-03-01 17:50:00,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379070231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:00,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342981886] [2022-03-01 17:50:00,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:50:00,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:00,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:00,784 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) [2022-03-01 17:50:00,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-01 17:50:00,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:50:00,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:00,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:00,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:01,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:50:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:01,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:01,250 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:01,250 INFO L387 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 17 treesize of output 22 [2022-03-01 17:50:01,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:01,256 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:50:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:01,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342981886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:01,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:01,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 17:50:01,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950207921] [2022-03-01 17:50:01,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:01,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:50:01,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:01,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:50:01,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:50:01,277 INFO L87 Difference]: Start difference. First operand 2590 states and 11681 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:01,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:01,964 INFO L93 Difference]: Finished difference Result 3767 states and 15975 transitions. [2022-03-01 17:50:01,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:50:01,964 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:01,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:01,973 INFO L225 Difference]: With dead ends: 3767 [2022-03-01 17:50:01,974 INFO L226 Difference]: Without dead ends: 3729 [2022-03-01 17:50:01,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=1148, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:50:01,974 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 509 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 1533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:01,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 428 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:50:01,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2022-03-01 17:50:02,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 2764. [2022-03-01 17:50:02,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2763 states have (on average 4.509952949692363) internal successors, (12461), 2763 states have internal predecessors, (12461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:02,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 12461 transitions. [2022-03-01 17:50:02,036 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 12461 transitions. Word has length 29 [2022-03-01 17:50:02,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:02,036 INFO L470 AbstractCegarLoop]: Abstraction has 2764 states and 12461 transitions. [2022-03-01 17:50:02,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:02,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 12461 transitions. [2022-03-01 17:50:02,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:02,041 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:02,041 INFO L514 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] [2022-03-01 17:50:02,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:02,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-01 17:50:02,257 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:02,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:02,257 INFO L85 PathProgramCache]: Analyzing trace with hash 690920689, now seen corresponding path program 12 times [2022-03-01 17:50:02,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:02,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455003478] [2022-03-01 17:50:02,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:02,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:02,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:02,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:02,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455003478] [2022-03-01 17:50:02,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455003478] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:02,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641701329] [2022-03-01 17:50:02,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:50:02,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:02,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:02,393 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) [2022-03-01 17:50:02,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-01 17:50:02,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:50:02,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:02,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 17:50:02,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:02,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:02,470 INFO L387 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 [2022-03-01 17:50:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:02,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:02,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641701329] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:02,666 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:02,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 18 [2022-03-01 17:50:02,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171473015] [2022-03-01 17:50:02,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:02,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:50:02,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:02,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:50:02,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:50:02,667 INFO L87 Difference]: Start difference. First operand 2764 states and 12461 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:02,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:02,883 INFO L93 Difference]: Finished difference Result 3113 states and 13640 transitions. [2022-03-01 17:50:02,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:50:02,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:02,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:02,891 INFO L225 Difference]: With dead ends: 3113 [2022-03-01 17:50:02,892 INFO L226 Difference]: Without dead ends: 3100 [2022-03-01 17:50:02,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:50:02,892 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 194 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:02,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 191 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:50:02,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2022-03-01 17:50:02,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 2764. [2022-03-01 17:50:02,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2763 states have (on average 4.508867173362288) internal successors, (12458), 2763 states have internal predecessors, (12458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:02,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 12458 transitions. [2022-03-01 17:50:02,941 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 12458 transitions. Word has length 29 [2022-03-01 17:50:02,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:02,941 INFO L470 AbstractCegarLoop]: Abstraction has 2764 states and 12458 transitions. [2022-03-01 17:50:02,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:02,941 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 12458 transitions. [2022-03-01 17:50:02,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:02,946 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:02,946 INFO L514 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] [2022-03-01 17:50:02,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-01 17:50:03,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:03,162 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:03,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:03,162 INFO L85 PathProgramCache]: Analyzing trace with hash 245818669, now seen corresponding path program 13 times [2022-03-01 17:50:03,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:03,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194709244] [2022-03-01 17:50:03,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:03,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:03,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:03,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194709244] [2022-03-01 17:50:03,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194709244] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:03,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807362360] [2022-03-01 17:50:03,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:50:03,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:03,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:03,277 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) [2022-03-01 17:50:03,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-01 17:50:03,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:03,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:03,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:03,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:50:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:03,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:03,666 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:03,666 INFO L387 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 17 treesize of output 22 [2022-03-01 17:50:03,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:03,678 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:50:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:03,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807362360] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:03,711 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:03,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 17:50:03,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523504642] [2022-03-01 17:50:03,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:03,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:50:03,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:03,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:50:03,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:50:03,711 INFO L87 Difference]: Start difference. First operand 2764 states and 12458 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:04,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:04,582 INFO L93 Difference]: Finished difference Result 3696 states and 15794 transitions. [2022-03-01 17:50:04,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:50:04,583 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:04,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:04,592 INFO L225 Difference]: With dead ends: 3696 [2022-03-01 17:50:04,592 INFO L226 Difference]: Without dead ends: 3650 [2022-03-01 17:50:04,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:50:04,592 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 500 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:04,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 392 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:50:04,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3650 states. [2022-03-01 17:50:04,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3650 to 2657. [2022-03-01 17:50:04,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2656 states have (on average 4.511295180722891) internal successors, (11982), 2656 states have internal predecessors, (11982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:04,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 11982 transitions. [2022-03-01 17:50:04,681 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 11982 transitions. Word has length 29 [2022-03-01 17:50:04,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:04,681 INFO L470 AbstractCegarLoop]: Abstraction has 2657 states and 11982 transitions. [2022-03-01 17:50:04,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:04,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 11982 transitions. [2022-03-01 17:50:04,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:04,685 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:04,685 INFO L514 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] [2022-03-01 17:50:04,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:04,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:04,899 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:04,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:04,900 INFO L85 PathProgramCache]: Analyzing trace with hash -892761565, now seen corresponding path program 14 times [2022-03-01 17:50:04,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:04,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637991248] [2022-03-01 17:50:04,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:04,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:05,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:05,011 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:05,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637991248] [2022-03-01 17:50:05,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637991248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:05,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457377013] [2022-03-01 17:50:05,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:50:05,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:05,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:05,013 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) [2022-03-01 17:50:05,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-01 17:50:05,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:50:05,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:05,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:05,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:05,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:05,143 INFO L387 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 [2022-03-01 17:50:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:05,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:05,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457377013] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:05,399 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:05,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-01 17:50:05,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226953947] [2022-03-01 17:50:05,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:05,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:50:05,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:05,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:50:05,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:50:05,400 INFO L87 Difference]: Start difference. First operand 2657 states and 11982 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:05,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:05,742 INFO L93 Difference]: Finished difference Result 2811 states and 12524 transitions. [2022-03-01 17:50:05,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:50:05,742 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:05,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:05,748 INFO L225 Difference]: With dead ends: 2811 [2022-03-01 17:50:05,748 INFO L226 Difference]: Without dead ends: 2792 [2022-03-01 17:50:05,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:50:05,749 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 137 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:05,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 300 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:50:05,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2022-03-01 17:50:05,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2636. [2022-03-01 17:50:05,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2636 states, 2635 states have (on average 4.516508538899431) internal successors, (11901), 2635 states have internal predecessors, (11901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:05,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 11901 transitions. [2022-03-01 17:50:05,789 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 11901 transitions. Word has length 29 [2022-03-01 17:50:05,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:05,789 INFO L470 AbstractCegarLoop]: Abstraction has 2636 states and 11901 transitions. [2022-03-01 17:50:05,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:05,789 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 11901 transitions. [2022-03-01 17:50:05,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:05,793 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:05,793 INFO L514 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] [2022-03-01 17:50:05,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-01 17:50:06,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:06,008 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:06,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:06,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1546865603, now seen corresponding path program 15 times [2022-03-01 17:50:06,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:06,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376787823] [2022-03-01 17:50:06,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:06,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:06,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:06,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:06,081 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:06,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376787823] [2022-03-01 17:50:06,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376787823] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:06,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430040022] [2022-03-01 17:50:06,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:50:06,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:06,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:06,083 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) [2022-03-01 17:50:06,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-01 17:50:06,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:50:06,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:06,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-01 17:50:06,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:06,168 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:06,168 INFO L387 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 [2022-03-01 17:50:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:06,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:06,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430040022] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:06,449 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:06,449 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-03-01 17:50:06,449 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046810396] [2022-03-01 17:50:06,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:06,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:50:06,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:06,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:50:06,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:50:06,450 INFO L87 Difference]: Start difference. First operand 2636 states and 11901 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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) [2022-03-01 17:50:06,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:06,967 INFO L93 Difference]: Finished difference Result 3041 states and 13364 transitions. [2022-03-01 17:50:06,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:50:06,967 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 29 [2022-03-01 17:50:06,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:06,975 INFO L225 Difference]: With dead ends: 3041 [2022-03-01 17:50:06,975 INFO L226 Difference]: Without dead ends: 3022 [2022-03-01 17:50:06,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:50:06,975 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 151 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 1126 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:06,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 304 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1126 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:50:06,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2022-03-01 17:50:07,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2689. [2022-03-01 17:50:07,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2689 states, 2688 states have (on average 4.515625) internal successors, (12138), 2688 states have internal predecessors, (12138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:07,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2689 states to 2689 states and 12138 transitions. [2022-03-01 17:50:07,019 INFO L78 Accepts]: Start accepts. Automaton has 2689 states and 12138 transitions. Word has length 29 [2022-03-01 17:50:07,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:07,019 INFO L470 AbstractCegarLoop]: Abstraction has 2689 states and 12138 transitions. [2022-03-01 17:50:07,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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) [2022-03-01 17:50:07,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2689 states and 12138 transitions. [2022-03-01 17:50:07,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:07,023 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:07,023 INFO L514 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] [2022-03-01 17:50:07,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:07,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2022-03-01 17:50:07,239 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:07,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:07,240 INFO L85 PathProgramCache]: Analyzing trace with hash -243592997, now seen corresponding path program 16 times [2022-03-01 17:50:07,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:07,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373472676] [2022-03-01 17:50:07,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:07,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:07,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:07,331 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:07,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373472676] [2022-03-01 17:50:07,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373472676] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:07,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481741062] [2022-03-01 17:50:07,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:50:07,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:07,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:07,332 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) [2022-03-01 17:50:07,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-01 17:50:07,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:50:07,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:07,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:07,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:07,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:50:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:07,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:07,738 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:07,738 INFO L387 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 17 treesize of output 22 [2022-03-01 17:50:07,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:07,746 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:50:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:07,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481741062] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:07,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:07,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:50:07,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197828228] [2022-03-01 17:50:07,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:07,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:50:07,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:07,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:50:07,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:50:07,801 INFO L87 Difference]: Start difference. First operand 2689 states and 12138 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:08,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:08,567 INFO L93 Difference]: Finished difference Result 3583 states and 15392 transitions. [2022-03-01 17:50:08,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:50:08,567 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:08,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:08,576 INFO L225 Difference]: With dead ends: 3583 [2022-03-01 17:50:08,576 INFO L226 Difference]: Without dead ends: 3555 [2022-03-01 17:50:08,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:50:08,576 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 417 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:08,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 424 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:50:08,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3555 states. [2022-03-01 17:50:08,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3555 to 2783. [2022-03-01 17:50:08,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 4.524083393242272) internal successors, (12586), 2782 states have internal predecessors, (12586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:08,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 12586 transitions. [2022-03-01 17:50:08,627 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 12586 transitions. Word has length 29 [2022-03-01 17:50:08,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:08,627 INFO L470 AbstractCegarLoop]: Abstraction has 2783 states and 12586 transitions. [2022-03-01 17:50:08,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:08,627 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 12586 transitions. [2022-03-01 17:50:08,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:08,631 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:08,631 INFO L514 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] [2022-03-01 17:50:08,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:08,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:08,847 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:08,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:08,848 INFO L85 PathProgramCache]: Analyzing trace with hash -296979517, now seen corresponding path program 17 times [2022-03-01 17:50:08,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:08,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38924970] [2022-03-01 17:50:08,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:08,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:08,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:08,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38924970] [2022-03-01 17:50:08,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38924970] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:08,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284244361] [2022-03-01 17:50:08,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:50:08,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:08,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:08,952 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) [2022-03-01 17:50:08,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-01 17:50:09,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:50:09,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:09,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:09,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:09,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:50:09,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:09,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:09,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:09,324 INFO L387 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 17 treesize of output 22 [2022-03-01 17:50:09,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:09,330 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:50:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:09,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284244361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:09,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:09,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:50:09,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801136707] [2022-03-01 17:50:09,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:09,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:50:09,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:09,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:50:09,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:50:09,367 INFO L87 Difference]: Start difference. First operand 2783 states and 12586 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:09,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:09,928 INFO L93 Difference]: Finished difference Result 3573 states and 15377 transitions. [2022-03-01 17:50:09,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:50:09,928 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:09,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:09,936 INFO L225 Difference]: With dead ends: 3573 [2022-03-01 17:50:09,936 INFO L226 Difference]: Without dead ends: 3528 [2022-03-01 17:50:09,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:50:09,937 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 422 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:09,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 425 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:50:09,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2022-03-01 17:50:09,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 2746. [2022-03-01 17:50:09,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2746 states, 2745 states have (on average 4.523861566484517) internal successors, (12418), 2745 states have internal predecessors, (12418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:09,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2746 states to 2746 states and 12418 transitions. [2022-03-01 17:50:09,984 INFO L78 Accepts]: Start accepts. Automaton has 2746 states and 12418 transitions. Word has length 29 [2022-03-01 17:50:09,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:09,984 INFO L470 AbstractCegarLoop]: Abstraction has 2746 states and 12418 transitions. [2022-03-01 17:50:09,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:09,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2746 states and 12418 transitions. [2022-03-01 17:50:09,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:09,989 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:09,989 INFO L514 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] [2022-03-01 17:50:10,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:10,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:10,205 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:10,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:10,205 INFO L85 PathProgramCache]: Analyzing trace with hash -833520135, now seen corresponding path program 18 times [2022-03-01 17:50:10,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:10,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303938573] [2022-03-01 17:50:10,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:10,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:10,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:10,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303938573] [2022-03-01 17:50:10,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303938573] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:10,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815566854] [2022-03-01 17:50:10,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:50:10,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:10,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:10,314 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) [2022-03-01 17:50:10,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-01 17:50:10,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:50:10,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:10,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-01 17:50:10,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:10,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:50:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:10,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:10,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:10,766 INFO L387 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 17 treesize of output 22 [2022-03-01 17:50:10,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:10,775 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:50:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:10,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815566854] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:10,835 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:10,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-01 17:50:10,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408469233] [2022-03-01 17:50:10,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:10,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:50:10,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:10,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:50:10,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:50:10,835 INFO L87 Difference]: Start difference. First operand 2746 states and 12418 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:11,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:11,890 INFO L93 Difference]: Finished difference Result 3370 states and 14667 transitions. [2022-03-01 17:50:11,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:50:11,890 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:11,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:11,898 INFO L225 Difference]: With dead ends: 3370 [2022-03-01 17:50:11,898 INFO L226 Difference]: Without dead ends: 3332 [2022-03-01 17:50:11,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:50:11,899 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 405 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 1688 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:11,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 482 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1688 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:50:11,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3332 states. [2022-03-01 17:50:11,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3332 to 2725. [2022-03-01 17:50:11,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 4.526431718061674) internal successors, (12330), 2724 states have internal predecessors, (12330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:11,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 12330 transitions. [2022-03-01 17:50:11,943 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 12330 transitions. Word has length 29 [2022-03-01 17:50:11,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:11,943 INFO L470 AbstractCegarLoop]: Abstraction has 2725 states and 12330 transitions. [2022-03-01 17:50:11,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:11,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 12330 transitions. [2022-03-01 17:50:11,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:11,948 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:11,948 INFO L514 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] [2022-03-01 17:50:11,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-01 17:50:12,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:12,164 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:12,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:12,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1508540217, now seen corresponding path program 19 times [2022-03-01 17:50:12,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:12,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967047278] [2022-03-01 17:50:12,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:12,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:12,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:12,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967047278] [2022-03-01 17:50:12,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967047278] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:12,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379426779] [2022-03-01 17:50:12,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:50:12,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:12,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:12,247 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) [2022-03-01 17:50:12,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-01 17:50:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:12,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:12,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:12,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:50:12,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:12,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:12,506 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:12,506 INFO L387 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 17 treesize of output 22 [2022-03-01 17:50:12,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:12,513 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:50:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:12,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379426779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:12,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:12,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 17:50:12,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964917803] [2022-03-01 17:50:12,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:12,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:50:12,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:12,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:50:12,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:50:12,549 INFO L87 Difference]: Start difference. First operand 2725 states and 12330 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:13,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:13,184 INFO L93 Difference]: Finished difference Result 3641 states and 15769 transitions. [2022-03-01 17:50:13,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:50:13,184 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:13,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:13,193 INFO L225 Difference]: With dead ends: 3641 [2022-03-01 17:50:13,193 INFO L226 Difference]: Without dead ends: 3603 [2022-03-01 17:50:13,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:50:13,194 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 485 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:13,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 390 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1346 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:50:13,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3603 states. [2022-03-01 17:50:13,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3603 to 2862. [2022-03-01 17:50:13,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 4.53163229639986) internal successors, (12965), 2861 states have internal predecessors, (12965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 12965 transitions. [2022-03-01 17:50:13,245 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 12965 transitions. Word has length 29 [2022-03-01 17:50:13,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:13,245 INFO L470 AbstractCegarLoop]: Abstraction has 2862 states and 12965 transitions. [2022-03-01 17:50:13,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:13,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 12965 transitions. [2022-03-01 17:50:13,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:13,250 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:13,250 INFO L514 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] [2022-03-01 17:50:13,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-01 17:50:13,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:13,466 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:13,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:13,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1483154473, now seen corresponding path program 20 times [2022-03-01 17:50:13,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:13,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705764688] [2022-03-01 17:50:13,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:13,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:13,559 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:13,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705764688] [2022-03-01 17:50:13,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705764688] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:13,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391856356] [2022-03-01 17:50:13,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:50:13,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:13,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:13,560 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) [2022-03-01 17:50:13,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-01 17:50:13,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:50:13,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:13,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:13,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:13,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:13,724 INFO L387 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 [2022-03-01 17:50:13,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:13,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:14,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:14,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391856356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:14,054 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:14,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-03-01 17:50:14,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467358209] [2022-03-01 17:50:14,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:14,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:50:14,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:14,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:50:14,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:50:14,055 INFO L87 Difference]: Start difference. First operand 2862 states and 12965 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:14,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:14,525 INFO L93 Difference]: Finished difference Result 3080 states and 13720 transitions. [2022-03-01 17:50:14,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:50:14,525 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:14,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:14,534 INFO L225 Difference]: With dead ends: 3080 [2022-03-01 17:50:14,534 INFO L226 Difference]: Without dead ends: 3067 [2022-03-01 17:50:14,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:50:14,534 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 207 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:14,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 284 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:50:14,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3067 states. [2022-03-01 17:50:14,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3067 to 2862. [2022-03-01 17:50:14,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 4.5305837119888155) internal successors, (12962), 2861 states have internal predecessors, (12962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:14,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 12962 transitions. [2022-03-01 17:50:14,591 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 12962 transitions. Word has length 29 [2022-03-01 17:50:14,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:14,591 INFO L470 AbstractCegarLoop]: Abstraction has 2862 states and 12962 transitions. [2022-03-01 17:50:14,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:14,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 12962 transitions. [2022-03-01 17:50:14,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:14,597 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:14,597 INFO L514 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] [2022-03-01 17:50:14,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:14,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-03-01 17:50:14,811 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:14,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:14,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1912450751, now seen corresponding path program 21 times [2022-03-01 17:50:14,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:14,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129767781] [2022-03-01 17:50:14,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:14,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:14,906 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:14,906 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129767781] [2022-03-01 17:50:14,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129767781] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:14,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878405428] [2022-03-01 17:50:14,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:50:14,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:14,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:14,908 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) [2022-03-01 17:50:14,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-01 17:50:14,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:50:14,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:14,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:14,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:15,067 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:15,067 INFO L387 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 [2022-03-01 17:50:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:15,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:15,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878405428] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:15,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:15,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-01 17:50:15,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503868810] [2022-03-01 17:50:15,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:15,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:50:15,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:15,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:50:15,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:50:15,348 INFO L87 Difference]: Start difference. First operand 2862 states and 12962 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:15,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:15,819 INFO L93 Difference]: Finished difference Result 3113 states and 13817 transitions. [2022-03-01 17:50:15,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:50:15,819 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:15,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:15,827 INFO L225 Difference]: With dead ends: 3113 [2022-03-01 17:50:15,827 INFO L226 Difference]: Without dead ends: 3085 [2022-03-01 17:50:15,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:50:15,828 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 217 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:15,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 332 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:50:15,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2022-03-01 17:50:15,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 2808. [2022-03-01 17:50:15,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2808 states, 2807 states have (on average 4.5322408265051655) internal successors, (12722), 2807 states have internal predecessors, (12722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:15,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2808 states to 2808 states and 12722 transitions. [2022-03-01 17:50:15,898 INFO L78 Accepts]: Start accepts. Automaton has 2808 states and 12722 transitions. Word has length 29 [2022-03-01 17:50:15,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:15,899 INFO L470 AbstractCegarLoop]: Abstraction has 2808 states and 12722 transitions. [2022-03-01 17:50:15,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:15,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2808 states and 12722 transitions. [2022-03-01 17:50:15,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:15,903 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:15,903 INFO L514 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] [2022-03-01 17:50:15,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:16,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-01 17:50:16,119 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:16,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:16,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1052336511, now seen corresponding path program 22 times [2022-03-01 17:50:16,119 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:16,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726132712] [2022-03-01 17:50:16,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:16,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:16,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:16,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726132712] [2022-03-01 17:50:16,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726132712] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:16,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499145346] [2022-03-01 17:50:16,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:50:16,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:16,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:16,233 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) [2022-03-01 17:50:16,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-01 17:50:16,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:50:16,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:16,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:16,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:16,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:50:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:16,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:16,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:16,691 INFO L387 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 17 treesize of output 22 [2022-03-01 17:50:16,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:16,700 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:50:16,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:16,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499145346] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:16,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:16,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-01 17:50:16,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768973433] [2022-03-01 17:50:16,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:16,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:50:16,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:16,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:50:16,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:50:16,760 INFO L87 Difference]: Start difference. First operand 2808 states and 12722 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:17,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:17,783 INFO L93 Difference]: Finished difference Result 3497 states and 15184 transitions. [2022-03-01 17:50:17,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:50:17,784 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:17,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:17,792 INFO L225 Difference]: With dead ends: 3497 [2022-03-01 17:50:17,792 INFO L226 Difference]: Without dead ends: 3448 [2022-03-01 17:50:17,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=1350, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:50:17,793 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 323 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 2267 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 2318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:17,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 700 Invalid, 2318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2267 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:50:17,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3448 states. [2022-03-01 17:50:17,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3448 to 2796. [2022-03-01 17:50:17,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2795 states have (on average 4.535599284436493) internal successors, (12677), 2795 states have internal predecessors, (12677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:17,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 12677 transitions. [2022-03-01 17:50:17,839 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 12677 transitions. Word has length 29 [2022-03-01 17:50:17,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:17,839 INFO L470 AbstractCegarLoop]: Abstraction has 2796 states and 12677 transitions. [2022-03-01 17:50:17,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:17,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 12677 transitions. [2022-03-01 17:50:17,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:17,843 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:17,843 INFO L514 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] [2022-03-01 17:50:17,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:18,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-01 17:50:18,059 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:18,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:18,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1088211267, now seen corresponding path program 23 times [2022-03-01 17:50:18,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:18,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231959731] [2022-03-01 17:50:18,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:18,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:18,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:18,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:18,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231959731] [2022-03-01 17:50:18,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231959731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:18,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607929206] [2022-03-01 17:50:18,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:50:18,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:18,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:18,127 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) [2022-03-01 17:50:18,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-01 17:50:18,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:50:18,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:18,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:18,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:18,278 INFO L387 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 19 treesize of output 11 [2022-03-01 17:50:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:18,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:18,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:18,430 INFO L387 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 17 treesize of output 22 [2022-03-01 17:50:18,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:18,438 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:50:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:18,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607929206] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:18,477 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:18,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 17:50:18,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16047541] [2022-03-01 17:50:18,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:18,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:50:18,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:18,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:50:18,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:50:18,477 INFO L87 Difference]: Start difference. First operand 2796 states and 12677 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:19,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:19,129 INFO L93 Difference]: Finished difference Result 4024 states and 17301 transitions. [2022-03-01 17:50:19,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:50:19,130 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:19,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:19,139 INFO L225 Difference]: With dead ends: 4024 [2022-03-01 17:50:19,139 INFO L226 Difference]: Without dead ends: 3986 [2022-03-01 17:50:19,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=1176, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:50:19,140 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 550 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:19,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 446 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:50:19,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2022-03-01 17:50:19,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 2951. [2022-03-01 17:50:19,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2951 states, 2950 states have (on average 4.54271186440678) internal successors, (13401), 2950 states have internal predecessors, (13401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:19,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2951 states to 2951 states and 13401 transitions. [2022-03-01 17:50:19,194 INFO L78 Accepts]: Start accepts. Automaton has 2951 states and 13401 transitions. Word has length 29 [2022-03-01 17:50:19,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:19,195 INFO L470 AbstractCegarLoop]: Abstraction has 2951 states and 13401 transitions. [2022-03-01 17:50:19,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:19,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2951 states and 13401 transitions. [2022-03-01 17:50:19,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:19,200 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:19,200 INFO L514 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] [2022-03-01 17:50:19,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:19,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:19,415 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:19,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:19,415 INFO L85 PathProgramCache]: Analyzing trace with hash 215061339, now seen corresponding path program 24 times [2022-03-01 17:50:19,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:19,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187956823] [2022-03-01 17:50:19,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:19,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:19,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:19,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187956823] [2022-03-01 17:50:19,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187956823] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:19,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953336035] [2022-03-01 17:50:19,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:50:19,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:19,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:19,509 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) [2022-03-01 17:50:19,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-01 17:50:19,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:50:19,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:19,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:19,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:19,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:19,723 INFO L387 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 15 treesize of output 19 [2022-03-01 17:50:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:19,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:20,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953336035] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:20,024 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:20,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 18 [2022-03-01 17:50:20,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992763590] [2022-03-01 17:50:20,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:20,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:50:20,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:20,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:50:20,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:50:20,037 INFO L87 Difference]: Start difference. First operand 2951 states and 13401 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:20,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:20,459 INFO L93 Difference]: Finished difference Result 3262 states and 14473 transitions. [2022-03-01 17:50:20,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:50:20,459 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:20,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:20,468 INFO L225 Difference]: With dead ends: 3262 [2022-03-01 17:50:20,468 INFO L226 Difference]: Without dead ends: 3249 [2022-03-01 17:50:20,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:50:20,468 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 256 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 1186 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:20,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 348 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:50:20,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3249 states. [2022-03-01 17:50:20,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3249 to 2951. [2022-03-01 17:50:20,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2951 states, 2950 states have (on average 4.541694915254237) internal successors, (13398), 2950 states have internal predecessors, (13398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:20,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2951 states to 2951 states and 13398 transitions. [2022-03-01 17:50:20,540 INFO L78 Accepts]: Start accepts. Automaton has 2951 states and 13398 transitions. Word has length 29 [2022-03-01 17:50:20,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:20,540 INFO L470 AbstractCegarLoop]: Abstraction has 2951 states and 13398 transitions. [2022-03-01 17:50:20,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:20,541 INFO L276 IsEmpty]: Start isEmpty. Operand 2951 states and 13398 transitions. [2022-03-01 17:50:20,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:20,546 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:20,546 INFO L514 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] [2022-03-01 17:50:20,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-01 17:50:20,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-01 17:50:20,761 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:20,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:20,762 INFO L85 PathProgramCache]: Analyzing trace with hash -684300733, now seen corresponding path program 25 times [2022-03-01 17:50:20,762 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:20,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616836529] [2022-03-01 17:50:20,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:20,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:20,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:20,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616836529] [2022-03-01 17:50:20,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616836529] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:20,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905778164] [2022-03-01 17:50:20,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:50:20,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:20,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:20,870 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) [2022-03-01 17:50:20,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-01 17:50:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:20,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:20,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:21,064 INFO L387 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 19 treesize of output 11 [2022-03-01 17:50:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:21,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:21,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:21,278 INFO L387 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 17 treesize of output 22 [2022-03-01 17:50:21,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:21,288 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:50:21,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:21,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905778164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:21,350 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:21,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 17:50:21,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267334979] [2022-03-01 17:50:21,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:21,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:50:21,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:21,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:50:21,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:50:21,351 INFO L87 Difference]: Start difference. First operand 2951 states and 13398 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:22,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:22,416 INFO L93 Difference]: Finished difference Result 4082 states and 17431 transitions. [2022-03-01 17:50:22,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:50:22,417 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:22,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:22,426 INFO L225 Difference]: With dead ends: 4082 [2022-03-01 17:50:22,426 INFO L226 Difference]: Without dead ends: 4039 [2022-03-01 17:50:22,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=1322, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:50:22,427 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 408 mSDsluCounter, 1424 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:22,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 599 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1830 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 17:50:22,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4039 states. [2022-03-01 17:50:22,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4039 to 2900. [2022-03-01 17:50:22,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2900 states, 2899 states have (on average 4.541911003794412) internal successors, (13167), 2899 states have internal predecessors, (13167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:22,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2900 states to 2900 states and 13167 transitions. [2022-03-01 17:50:22,481 INFO L78 Accepts]: Start accepts. Automaton has 2900 states and 13167 transitions. Word has length 29 [2022-03-01 17:50:22,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:22,481 INFO L470 AbstractCegarLoop]: Abstraction has 2900 states and 13167 transitions. [2022-03-01 17:50:22,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:22,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2900 states and 13167 transitions. [2022-03-01 17:50:22,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:22,486 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:22,486 INFO L514 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] [2022-03-01 17:50:22,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-01 17:50:22,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-01 17:50:22,701 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:22,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:22,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1544414973, now seen corresponding path program 26 times [2022-03-01 17:50:22,702 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:22,702 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458894199] [2022-03-01 17:50:22,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:22,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:22,801 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:22,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458894199] [2022-03-01 17:50:22,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458894199] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:22,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088297736] [2022-03-01 17:50:22,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:50:22,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:22,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:22,804 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) [2022-03-01 17:50:22,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-01 17:50:22,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:50:22,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:22,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:22,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:23,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:23,017 INFO L387 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 15 treesize of output 19 [2022-03-01 17:50:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:23,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:23,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088297736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:23,382 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:23,382 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-01 17:50:23,382 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138510045] [2022-03-01 17:50:23,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:23,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:50:23,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:23,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:50:23,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:50:23,382 INFO L87 Difference]: Start difference. First operand 2900 states and 13167 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:23,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:23,851 INFO L93 Difference]: Finished difference Result 3123 states and 13925 transitions. [2022-03-01 17:50:23,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:50:23,852 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:23,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:23,859 INFO L225 Difference]: With dead ends: 3123 [2022-03-01 17:50:23,859 INFO L226 Difference]: Without dead ends: 3108 [2022-03-01 17:50:23,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:50:23,859 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 140 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:23,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 282 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:50:23,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3108 states. [2022-03-01 17:50:23,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3108 to 2888. [2022-03-01 17:50:23,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2888 states, 2887 states have (on average 4.545202632490475) internal successors, (13122), 2887 states have internal predecessors, (13122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:23,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2888 states to 2888 states and 13122 transitions. [2022-03-01 17:50:23,900 INFO L78 Accepts]: Start accepts. Automaton has 2888 states and 13122 transitions. Word has length 29 [2022-03-01 17:50:23,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:23,900 INFO L470 AbstractCegarLoop]: Abstraction has 2888 states and 13122 transitions. [2022-03-01 17:50:23,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:23,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2888 states and 13122 transitions. [2022-03-01 17:50:23,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:23,905 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:23,905 INFO L514 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] [2022-03-01 17:50:23,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-01 17:50:24,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:24,118 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:24,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:24,118 INFO L85 PathProgramCache]: Analyzing trace with hash 2042885267, now seen corresponding path program 27 times [2022-03-01 17:50:24,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:24,119 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325076401] [2022-03-01 17:50:24,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:24,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:24,221 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:24,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325076401] [2022-03-01 17:50:24,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325076401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:24,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791527764] [2022-03-01 17:50:24,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:50:24,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:24,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:24,222 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) [2022-03-01 17:50:24,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-01 17:50:24,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:50:24,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:24,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:24,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:24,506 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:24,506 INFO L387 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 15 treesize of output 19 [2022-03-01 17:50:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:24,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:24,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791527764] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:24,822 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:24,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-01 17:50:24,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526779843] [2022-03-01 17:50:24,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:24,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:50:24,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:24,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:50:24,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:50:24,823 INFO L87 Difference]: Start difference. First operand 2888 states and 13122 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 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) [2022-03-01 17:50:25,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:25,530 INFO L93 Difference]: Finished difference Result 3227 states and 14154 transitions. [2022-03-01 17:50:25,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:50:25,531 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 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 29 [2022-03-01 17:50:25,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:25,538 INFO L225 Difference]: With dead ends: 3227 [2022-03-01 17:50:25,538 INFO L226 Difference]: Without dead ends: 3212 [2022-03-01 17:50:25,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:50:25,539 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 246 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:25,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 445 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:50:25,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3212 states. [2022-03-01 17:50:25,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3212 to 2896. [2022-03-01 17:50:25,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2896 states, 2895 states have (on average 4.540241796200346) internal successors, (13144), 2895 states have internal predecessors, (13144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:25,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 13144 transitions. [2022-03-01 17:50:25,613 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 13144 transitions. Word has length 29 [2022-03-01 17:50:25,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:25,613 INFO L470 AbstractCegarLoop]: Abstraction has 2896 states and 13144 transitions. [2022-03-01 17:50:25,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 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) [2022-03-01 17:50:25,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 13144 transitions. [2022-03-01 17:50:25,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:25,631 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:25,631 INFO L514 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] [2022-03-01 17:50:25,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:25,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:25,832 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:25,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:25,832 INFO L85 PathProgramCache]: Analyzing trace with hash 221849841, now seen corresponding path program 28 times [2022-03-01 17:50:25,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:25,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210258551] [2022-03-01 17:50:25,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:25,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:25,921 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:25,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210258551] [2022-03-01 17:50:25,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210258551] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:25,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406864278] [2022-03-01 17:50:25,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:50:25,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:25,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:25,923 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) [2022-03-01 17:50:25,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-01 17:50:25,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:50:25,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:25,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:25,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:26,085 INFO L387 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 19 treesize of output 11 [2022-03-01 17:50:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:26,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:26,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:26,230 INFO L387 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 17 treesize of output 22 [2022-03-01 17:50:26,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:26,237 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:50:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:26,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406864278] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:26,278 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:26,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-01 17:50:26,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946442172] [2022-03-01 17:50:26,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:26,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:50:26,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:26,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:50:26,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:50:26,278 INFO L87 Difference]: Start difference. First operand 2896 states and 13144 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:27,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:27,231 INFO L93 Difference]: Finished difference Result 3822 states and 16496 transitions. [2022-03-01 17:50:27,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:50:27,231 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:27,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:27,241 INFO L225 Difference]: With dead ends: 3822 [2022-03-01 17:50:27,241 INFO L226 Difference]: Without dead ends: 3792 [2022-03-01 17:50:27,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=1502, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:50:27,241 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 338 mSDsluCounter, 1683 mSDsCounter, 0 mSdLazyCounter, 2250 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 2294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:27,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 691 Invalid, 2294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2250 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:50:27,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3792 states. [2022-03-01 17:50:27,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3792 to 2896. [2022-03-01 17:50:27,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2896 states, 2895 states have (on average 4.541278065630397) internal successors, (13147), 2895 states have internal predecessors, (13147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:27,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 13147 transitions. [2022-03-01 17:50:27,291 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 13147 transitions. Word has length 29 [2022-03-01 17:50:27,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:27,292 INFO L470 AbstractCegarLoop]: Abstraction has 2896 states and 13147 transitions. [2022-03-01 17:50:27,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:27,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 13147 transitions. [2022-03-01 17:50:27,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:27,296 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:27,296 INFO L514 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] [2022-03-01 17:50:27,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:27,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-03-01 17:50:27,512 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:27,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:27,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1437686031, now seen corresponding path program 15 times [2022-03-01 17:50:27,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:27,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134696814] [2022-03-01 17:50:27,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:27,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:27,576 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:27,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134696814] [2022-03-01 17:50:27,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134696814] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:27,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896290843] [2022-03-01 17:50:27,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:50:27,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:27,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:27,577 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) [2022-03-01 17:50:27,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-01 17:50:27,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:50:27,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:27,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:27,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:27,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:27,725 INFO L387 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 15 treesize of output 19 [2022-03-01 17:50:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:27,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:28,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896290843] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:28,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:28,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-01 17:50:28,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614757908] [2022-03-01 17:50:28,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:28,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:50:28,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:28,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:50:28,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:50:28,002 INFO L87 Difference]: Start difference. First operand 2896 states and 13147 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:28,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:28,640 INFO L93 Difference]: Finished difference Result 3431 states and 15157 transitions. [2022-03-01 17:50:28,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:50:28,641 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:28,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:28,649 INFO L225 Difference]: With dead ends: 3431 [2022-03-01 17:50:28,649 INFO L226 Difference]: Without dead ends: 3412 [2022-03-01 17:50:28,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:50:28,650 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 326 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:28,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 332 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:50:28,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3412 states. [2022-03-01 17:50:28,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3412 to 2939. [2022-03-01 17:50:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2939 states, 2938 states have (on average 4.533356024506467) internal successors, (13319), 2938 states have internal predecessors, (13319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:28,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2939 states to 2939 states and 13319 transitions. [2022-03-01 17:50:28,696 INFO L78 Accepts]: Start accepts. Automaton has 2939 states and 13319 transitions. Word has length 29 [2022-03-01 17:50:28,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:28,696 INFO L470 AbstractCegarLoop]: Abstraction has 2939 states and 13319 transitions. [2022-03-01 17:50:28,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:28,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2939 states and 13319 transitions. [2022-03-01 17:50:28,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:28,701 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:28,701 INFO L514 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] [2022-03-01 17:50:28,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:28,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:28,917 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:28,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:28,917 INFO L85 PathProgramCache]: Analyzing trace with hash -15331205, now seen corresponding path program 16 times [2022-03-01 17:50:28,917 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:28,917 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452558854] [2022-03-01 17:50:28,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:28,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:29,004 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:29,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452558854] [2022-03-01 17:50:29,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452558854] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:29,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248827060] [2022-03-01 17:50:29,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:50:29,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:29,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:29,005 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) [2022-03-01 17:50:29,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-01 17:50:29,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:50:29,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:29,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:29,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:29,197 INFO L387 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 19 treesize of output 11 [2022-03-01 17:50:29,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:29,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:29,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:29,430 INFO L387 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 17 treesize of output 22 [2022-03-01 17:50:29,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:29,440 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:50:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:29,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248827060] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:29,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:29,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:50:29,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526401676] [2022-03-01 17:50:29,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:29,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:50:29,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:29,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:50:29,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:50:29,491 INFO L87 Difference]: Start difference. First operand 2939 states and 13319 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:30,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:30,367 INFO L93 Difference]: Finished difference Result 4321 states and 18515 transitions. [2022-03-01 17:50:30,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:50:30,368 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:30,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:30,378 INFO L225 Difference]: With dead ends: 4321 [2022-03-01 17:50:30,378 INFO L226 Difference]: Without dead ends: 4293 [2022-03-01 17:50:30,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:50:30,379 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 414 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:30,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 497 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1633 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:50:30,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4293 states. [2022-03-01 17:50:30,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4293 to 3083. [2022-03-01 17:50:30,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3083 states, 3082 states have (on average 4.540882543802725) internal successors, (13995), 3082 states have internal predecessors, (13995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:30,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3083 states to 3083 states and 13995 transitions. [2022-03-01 17:50:30,436 INFO L78 Accepts]: Start accepts. Automaton has 3083 states and 13995 transitions. Word has length 29 [2022-03-01 17:50:30,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:30,437 INFO L470 AbstractCegarLoop]: Abstraction has 3083 states and 13995 transitions. [2022-03-01 17:50:30,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:30,437 INFO L276 IsEmpty]: Start isEmpty. Operand 3083 states and 13995 transitions. [2022-03-01 17:50:30,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:30,442 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:30,442 INFO L514 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] [2022-03-01 17:50:30,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:30,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:30,643 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:30,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:30,643 INFO L85 PathProgramCache]: Analyzing trace with hash 385542327, now seen corresponding path program 17 times [2022-03-01 17:50:30,643 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:30,643 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768868209] [2022-03-01 17:50:30,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:30,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:30,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:30,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768868209] [2022-03-01 17:50:30,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768868209] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:30,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534827095] [2022-03-01 17:50:30,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:50:30,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:30,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:30,747 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) [2022-03-01 17:50:30,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-01 17:50:30,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:50:30,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:30,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:30,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:30,922 INFO L387 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 19 treesize of output 11 [2022-03-01 17:50:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:31,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:31,154 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:31,154 INFO L387 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 17 treesize of output 22 [2022-03-01 17:50:31,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:31,163 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:50:31,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:31,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534827095] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:31,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:31,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:50:31,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286825396] [2022-03-01 17:50:31,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:31,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:50:31,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:31,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:50:31,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:50:31,213 INFO L87 Difference]: Start difference. First operand 3083 states and 13995 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:32,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:32,099 INFO L93 Difference]: Finished difference Result 4335 states and 18554 transitions. [2022-03-01 17:50:32,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:50:32,100 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:32,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:32,110 INFO L225 Difference]: With dead ends: 4335 [2022-03-01 17:50:32,110 INFO L226 Difference]: Without dead ends: 4302 [2022-03-01 17:50:32,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:50:32,111 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 395 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 1676 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:32,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 520 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1676 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:50:32,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4302 states. [2022-03-01 17:50:32,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4302 to 3015. [2022-03-01 17:50:32,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3015 states, 3014 states have (on average 4.542136695421367) internal successors, (13690), 3014 states have internal predecessors, (13690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:32,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 13690 transitions. [2022-03-01 17:50:32,168 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 13690 transitions. Word has length 29 [2022-03-01 17:50:32,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:32,169 INFO L470 AbstractCegarLoop]: Abstraction has 3015 states and 13690 transitions. [2022-03-01 17:50:32,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:32,169 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 13690 transitions. [2022-03-01 17:50:32,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:32,174 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:32,174 INFO L514 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] [2022-03-01 17:50:32,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:32,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-03-01 17:50:32,389 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:32,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:32,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1616862839, now seen corresponding path program 18 times [2022-03-01 17:50:32,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:32,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790849144] [2022-03-01 17:50:32,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:32,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:32,497 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:32,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790849144] [2022-03-01 17:50:32,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790849144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:32,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478341883] [2022-03-01 17:50:32,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:50:32,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:32,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:32,498 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) [2022-03-01 17:50:32,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-01 17:50:32,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:50:32,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:32,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:32,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:32,628 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:32,628 INFO L387 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 15 treesize of output 19 [2022-03-01 17:50:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:32,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:32,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478341883] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:32,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:32,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-01 17:50:32,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175775578] [2022-03-01 17:50:32,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:32,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:50:32,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:32,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:50:32,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:50:32,871 INFO L87 Difference]: Start difference. First operand 3015 states and 13690 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:33,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:33,275 INFO L93 Difference]: Finished difference Result 3287 states and 14668 transitions. [2022-03-01 17:50:33,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:50:33,275 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:33,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:33,284 INFO L225 Difference]: With dead ends: 3287 [2022-03-01 17:50:33,284 INFO L226 Difference]: Without dead ends: 3272 [2022-03-01 17:50:33,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:50:33,284 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 172 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:33,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 285 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:50:33,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2022-03-01 17:50:33,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2997. [2022-03-01 17:50:33,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2997 states, 2996 states have (on average 4.54539385847797) internal successors, (13618), 2996 states have internal predecessors, (13618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:33,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 13618 transitions. [2022-03-01 17:50:33,356 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 13618 transitions. Word has length 29 [2022-03-01 17:50:33,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:33,356 INFO L470 AbstractCegarLoop]: Abstraction has 2997 states and 13618 transitions. [2022-03-01 17:50:33,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:33,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 13618 transitions. [2022-03-01 17:50:33,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:33,361 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:33,361 INFO L514 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] [2022-03-01 17:50:33,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:33,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:33,575 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:33,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:33,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1364453939, now seen corresponding path program 19 times [2022-03-01 17:50:33,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:33,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520054405] [2022-03-01 17:50:33,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:33,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:33,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:33,659 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:33,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520054405] [2022-03-01 17:50:33,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520054405] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:33,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81774849] [2022-03-01 17:50:33,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:50:33,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:33,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:33,660 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) [2022-03-01 17:50:33,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-01 17:50:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:33,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:33,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:33,920 INFO L387 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 19 treesize of output 11 [2022-03-01 17:50:33,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:33,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:34,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:34,137 INFO L387 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 17 treesize of output 22 [2022-03-01 17:50:34,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:34,147 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:50:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:34,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81774849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:34,202 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:34,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-01 17:50:34,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483103664] [2022-03-01 17:50:34,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:34,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:50:34,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:34,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:50:34,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:50:34,203 INFO L87 Difference]: Start difference. First operand 2997 states and 13618 transitions. Second operand has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:34,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:34,987 INFO L93 Difference]: Finished difference Result 3324 states and 14803 transitions. [2022-03-01 17:50:34,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:50:34,988 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:34,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:34,996 INFO L225 Difference]: With dead ends: 3324 [2022-03-01 17:50:34,996 INFO L226 Difference]: Without dead ends: 3309 [2022-03-01 17:50:34,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:50:34,997 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 324 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:34,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 385 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1297 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:50:35,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3309 states. [2022-03-01 17:50:35,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3309 to 2991. [2022-03-01 17:50:35,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 4.548160535117057) internal successors, (13599), 2990 states have internal predecessors, (13599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:35,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 13599 transitions. [2022-03-01 17:50:35,044 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 13599 transitions. Word has length 29 [2022-03-01 17:50:35,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:35,045 INFO L470 AbstractCegarLoop]: Abstraction has 2991 states and 13599 transitions. [2022-03-01 17:50:35,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:35,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 13599 transitions. [2022-03-01 17:50:35,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:35,050 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:35,050 INFO L514 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] [2022-03-01 17:50:35,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-03-01 17:50:35,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-03-01 17:50:35,263 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:35,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:35,263 INFO L85 PathProgramCache]: Analyzing trace with hash -456581487, now seen corresponding path program 20 times [2022-03-01 17:50:35,263 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:35,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344059758] [2022-03-01 17:50:35,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:35,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:35,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:35,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:35,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344059758] [2022-03-01 17:50:35,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344059758] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:35,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554039004] [2022-03-01 17:50:35,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:50:35,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:35,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:35,362 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) [2022-03-01 17:50:35,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-01 17:50:35,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:50:35,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:35,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:35,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:35,590 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:35,590 INFO L387 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 17 treesize of output 21 [2022-03-01 17:50:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:35,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:35,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554039004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:35,866 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:35,866 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-01 17:50:35,866 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246769982] [2022-03-01 17:50:35,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:35,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:50:35,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:35,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:50:35,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:50:35,867 INFO L87 Difference]: Start difference. First operand 2991 states and 13599 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:36,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:36,292 INFO L93 Difference]: Finished difference Result 3244 states and 14493 transitions. [2022-03-01 17:50:36,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:50:36,293 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:36,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:36,301 INFO L225 Difference]: With dead ends: 3244 [2022-03-01 17:50:36,301 INFO L226 Difference]: Without dead ends: 3229 [2022-03-01 17:50:36,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:50:36,301 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 141 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:36,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 304 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:50:36,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2022-03-01 17:50:36,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 2972. [2022-03-01 17:50:36,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2972 states, 2971 states have (on average 4.554022214742511) internal successors, (13530), 2971 states have internal predecessors, (13530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:36,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2972 states to 2972 states and 13530 transitions. [2022-03-01 17:50:36,384 INFO L78 Accepts]: Start accepts. Automaton has 2972 states and 13530 transitions. Word has length 29 [2022-03-01 17:50:36,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:36,384 INFO L470 AbstractCegarLoop]: Abstraction has 2972 states and 13530 transitions. [2022-03-01 17:50:36,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:36,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2972 states and 13530 transitions. [2022-03-01 17:50:36,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:36,389 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:36,389 INFO L514 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] [2022-03-01 17:50:36,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:36,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:36,602 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:36,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:36,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1831959469, now seen corresponding path program 21 times [2022-03-01 17:50:36,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:36,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355904727] [2022-03-01 17:50:36,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:36,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:36,715 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:36,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355904727] [2022-03-01 17:50:36,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355904727] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:36,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497781358] [2022-03-01 17:50:36,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:50:36,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:36,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:36,716 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) [2022-03-01 17:50:36,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-01 17:50:36,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:50:36,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:36,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:36,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:36,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:36,866 INFO L387 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 [2022-03-01 17:50:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:37,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:37,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497781358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:37,265 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:37,265 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-01 17:50:37,265 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102285690] [2022-03-01 17:50:37,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:37,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:50:37,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:37,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:50:37,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:50:37,265 INFO L87 Difference]: Start difference. First operand 2972 states and 13530 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:37,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:37,879 INFO L93 Difference]: Finished difference Result 3355 states and 14980 transitions. [2022-03-01 17:50:37,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:50:37,879 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:37,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:37,887 INFO L225 Difference]: With dead ends: 3355 [2022-03-01 17:50:37,887 INFO L226 Difference]: Without dead ends: 3336 [2022-03-01 17:50:37,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:50:37,888 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 268 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:37,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 332 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:50:37,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2022-03-01 17:50:37,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 3012. [2022-03-01 17:50:37,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3012 states, 3011 states have (on average 4.549651278644968) internal successors, (13699), 3011 states have internal predecessors, (13699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:37,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3012 states to 3012 states and 13699 transitions. [2022-03-01 17:50:37,940 INFO L78 Accepts]: Start accepts. Automaton has 3012 states and 13699 transitions. Word has length 29 [2022-03-01 17:50:37,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:37,940 INFO L470 AbstractCegarLoop]: Abstraction has 3012 states and 13699 transitions. [2022-03-01 17:50:37,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:37,941 INFO L276 IsEmpty]: Start isEmpty. Operand 3012 states and 13699 transitions. [2022-03-01 17:50:37,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:37,946 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:37,947 INFO L514 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] [2022-03-01 17:50:37,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:38,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-03-01 17:50:38,163 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:38,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:38,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1040653001, now seen corresponding path program 22 times [2022-03-01 17:50:38,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:38,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909148922] [2022-03-01 17:50:38,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:38,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:38,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:38,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909148922] [2022-03-01 17:50:38,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909148922] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:38,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274792174] [2022-03-01 17:50:38,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:50:38,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:38,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:38,233 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) [2022-03-01 17:50:38,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-01 17:50:38,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:50:38,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:38,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:38,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:38,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:50:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:38,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:38,504 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:38,504 INFO L387 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 17 treesize of output 22 [2022-03-01 17:50:38,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:38,510 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:50:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:38,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274792174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:38,541 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:38,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:50:38,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251363283] [2022-03-01 17:50:38,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:38,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:50:38,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:38,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:50:38,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:50:38,541 INFO L87 Difference]: Start difference. First operand 3012 states and 13699 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:39,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:39,125 INFO L93 Difference]: Finished difference Result 4029 states and 17462 transitions. [2022-03-01 17:50:39,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:50:39,125 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:39,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:39,135 INFO L225 Difference]: With dead ends: 4029 [2022-03-01 17:50:39,135 INFO L226 Difference]: Without dead ends: 4001 [2022-03-01 17:50:39,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:50:39,136 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 325 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:39,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 444 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1446 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:50:39,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2022-03-01 17:50:39,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 3137. [2022-03-01 17:50:39,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3137 states, 3136 states have (on average 4.548788265306122) internal successors, (14265), 3136 states have internal predecessors, (14265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:39,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3137 states to 3137 states and 14265 transitions. [2022-03-01 17:50:39,190 INFO L78 Accepts]: Start accepts. Automaton has 3137 states and 14265 transitions. Word has length 29 [2022-03-01 17:50:39,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:39,190 INFO L470 AbstractCegarLoop]: Abstraction has 3137 states and 14265 transitions. [2022-03-01 17:50:39,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:39,190 INFO L276 IsEmpty]: Start isEmpty. Operand 3137 states and 14265 transitions. [2022-03-01 17:50:39,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:39,195 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:39,196 INFO L514 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] [2022-03-01 17:50:39,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-03-01 17:50:39,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-01 17:50:39,411 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:39,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:39,411 INFO L85 PathProgramCache]: Analyzing trace with hash -639779469, now seen corresponding path program 23 times [2022-03-01 17:50:39,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:39,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773199829] [2022-03-01 17:50:39,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:39,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:39,511 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:39,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773199829] [2022-03-01 17:50:39,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773199829] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:39,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467600917] [2022-03-01 17:50:39,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:50:39,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:39,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:39,513 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) [2022-03-01 17:50:39,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-01 17:50:39,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:50:39,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:39,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:39,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:39,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:50:39,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:39,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:39,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:39,831 INFO L387 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 17 treesize of output 22 [2022-03-01 17:50:39,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:39,838 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:50:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:39,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467600917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:39,878 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:39,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:50:39,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282541532] [2022-03-01 17:50:39,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:39,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:50:39,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:39,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:50:39,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:50:39,878 INFO L87 Difference]: Start difference. First operand 3137 states and 14265 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:40,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:40,481 INFO L93 Difference]: Finished difference Result 4043 states and 17501 transitions. [2022-03-01 17:50:40,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:50:40,482 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:40,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:40,491 INFO L225 Difference]: With dead ends: 4043 [2022-03-01 17:50:40,491 INFO L226 Difference]: Without dead ends: 4010 [2022-03-01 17:50:40,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:50:40,492 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 357 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:40,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 431 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:50:40,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4010 states. [2022-03-01 17:50:40,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4010 to 3038. [2022-03-01 17:50:40,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 3037 states have (on average 4.552848205465921) internal successors, (13827), 3037 states have internal predecessors, (13827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:40,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 13827 transitions. [2022-03-01 17:50:40,546 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 13827 transitions. Word has length 29 [2022-03-01 17:50:40,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:40,546 INFO L470 AbstractCegarLoop]: Abstraction has 3038 states and 13827 transitions. [2022-03-01 17:50:40,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:40,546 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 13827 transitions. [2022-03-01 17:50:40,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:40,551 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:40,551 INFO L514 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] [2022-03-01 17:50:40,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:40,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-03-01 17:50:40,764 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:40,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:40,764 INFO L85 PathProgramCache]: Analyzing trace with hash 591541043, now seen corresponding path program 24 times [2022-03-01 17:50:40,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:40,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989427338] [2022-03-01 17:50:40,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:40,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:40,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:40,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:40,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989427338] [2022-03-01 17:50:40,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989427338] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:40,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265345386] [2022-03-01 17:50:40,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:50:40,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:40,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:40,886 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) [2022-03-01 17:50:40,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-01 17:50:40,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:50:40,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:40,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:40,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:41,043 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:41,043 INFO L387 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 [2022-03-01 17:50:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:41,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:41,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265345386] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:41,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:41,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-01 17:50:41,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555085741] [2022-03-01 17:50:41,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:41,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:50:41,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:41,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:50:41,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:50:41,467 INFO L87 Difference]: Start difference. First operand 3038 states and 13827 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:41,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:41,965 INFO L93 Difference]: Finished difference Result 3150 states and 14218 transitions. [2022-03-01 17:50:41,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:50:41,965 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:41,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:41,973 INFO L225 Difference]: With dead ends: 3150 [2022-03-01 17:50:41,973 INFO L226 Difference]: Without dead ends: 3135 [2022-03-01 17:50:41,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:50:41,973 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 128 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:41,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 285 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:50:41,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2022-03-01 17:50:42,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 3017. [2022-03-01 17:50:42,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 3016 states have (on average 4.5576923076923075) internal successors, (13746), 3016 states have internal predecessors, (13746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:42,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 13746 transitions. [2022-03-01 17:50:42,020 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 13746 transitions. Word has length 29 [2022-03-01 17:50:42,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:42,020 INFO L470 AbstractCegarLoop]: Abstraction has 3017 states and 13746 transitions. [2022-03-01 17:50:42,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:42,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 13746 transitions. [2022-03-01 17:50:42,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:42,025 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:42,026 INFO L514 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] [2022-03-01 17:50:42,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:42,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-03-01 17:50:42,233 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:42,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:42,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1215097935, now seen corresponding path program 25 times [2022-03-01 17:50:42,233 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:42,233 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912255170] [2022-03-01 17:50:42,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:42,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:42,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:42,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912255170] [2022-03-01 17:50:42,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912255170] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:42,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554678508] [2022-03-01 17:50:42,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:50:42,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:42,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:42,348 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) [2022-03-01 17:50:42,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-01 17:50:42,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:42,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:42,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:42,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:50:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:42,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:42,614 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:42,615 INFO L387 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 17 treesize of output 22 [2022-03-01 17:50:42,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:42,621 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:50:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:42,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554678508] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:42,651 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:42,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 17:50:42,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389129378] [2022-03-01 17:50:42,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:42,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:50:42,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:42,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:50:42,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:50:42,652 INFO L87 Difference]: Start difference. First operand 3017 states and 13746 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:43,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:43,297 INFO L93 Difference]: Finished difference Result 4128 states and 17779 transitions. [2022-03-01 17:50:43,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:50:43,297 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:43,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:43,307 INFO L225 Difference]: With dead ends: 4128 [2022-03-01 17:50:43,307 INFO L226 Difference]: Without dead ends: 4090 [2022-03-01 17:50:43,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:50:43,308 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 515 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:43,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 412 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:50:43,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4090 states. [2022-03-01 17:50:43,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4090 to 3177. [2022-03-01 17:50:43,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 3176 states have (on average 4.554156171284634) internal successors, (14464), 3176 states have internal predecessors, (14464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:43,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 14464 transitions. [2022-03-01 17:50:43,366 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 14464 transitions. Word has length 29 [2022-03-01 17:50:43,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:43,366 INFO L470 AbstractCegarLoop]: Abstraction has 3177 states and 14464 transitions. [2022-03-01 17:50:43,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:43,366 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 14464 transitions. [2022-03-01 17:50:43,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:43,372 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:43,372 INFO L514 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] [2022-03-01 17:50:43,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:43,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:43,588 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:43,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:43,588 INFO L85 PathProgramCache]: Analyzing trace with hash 207256891, now seen corresponding path program 26 times [2022-03-01 17:50:43,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:43,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213737617] [2022-03-01 17:50:43,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:43,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:43,669 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:43,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213737617] [2022-03-01 17:50:43,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213737617] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:43,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449999875] [2022-03-01 17:50:43,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:50:43,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:43,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:43,670 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) [2022-03-01 17:50:43,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-01 17:50:43,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:50:43,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:43,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:43,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:43,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:43,788 INFO L387 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 [2022-03-01 17:50:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:43,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:44,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:44,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449999875] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:44,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:44,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-03-01 17:50:44,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676280605] [2022-03-01 17:50:44,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:44,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:50:44,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:44,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:50:44,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:50:44,117 INFO L87 Difference]: Start difference. First operand 3177 states and 14464 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:44,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:44,553 INFO L93 Difference]: Finished difference Result 3501 states and 15546 transitions. [2022-03-01 17:50:44,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:50:44,553 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:44,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:44,562 INFO L225 Difference]: With dead ends: 3501 [2022-03-01 17:50:44,562 INFO L226 Difference]: Without dead ends: 3488 [2022-03-01 17:50:44,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:50:44,562 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 271 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:44,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 263 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:50:44,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3488 states. [2022-03-01 17:50:44,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3488 to 3177. [2022-03-01 17:50:44,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 3176 states have (on average 4.553211586901763) internal successors, (14461), 3176 states have internal predecessors, (14461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:44,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 14461 transitions. [2022-03-01 17:50:44,618 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 14461 transitions. Word has length 29 [2022-03-01 17:50:44,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:44,618 INFO L470 AbstractCegarLoop]: Abstraction has 3177 states and 14461 transitions. [2022-03-01 17:50:44,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:44,619 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 14461 transitions. [2022-03-01 17:50:44,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:44,624 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:44,624 INFO L514 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] [2022-03-01 17:50:44,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-03-01 17:50:44,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:44,840 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:44,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:44,840 INFO L85 PathProgramCache]: Analyzing trace with hash -237845129, now seen corresponding path program 27 times [2022-03-01 17:50:44,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:44,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851117990] [2022-03-01 17:50:44,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:44,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:44,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:44,951 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:44,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851117990] [2022-03-01 17:50:44,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851117990] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:44,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662177417] [2022-03-01 17:50:44,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:50:44,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:44,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:44,952 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) [2022-03-01 17:50:44,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-01 17:50:44,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:50:44,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:44,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:44,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:45,112 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:45,112 INFO L387 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 [2022-03-01 17:50:45,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:45,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:45,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662177417] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:45,502 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:45,502 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-03-01 17:50:45,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974623804] [2022-03-01 17:50:45,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:45,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:50:45,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:45,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:50:45,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:50:45,503 INFO L87 Difference]: Start difference. First operand 3177 states and 14461 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:46,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:46,180 INFO L93 Difference]: Finished difference Result 3456 states and 15433 transitions. [2022-03-01 17:50:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:50:46,180 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:46,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:46,189 INFO L225 Difference]: With dead ends: 3456 [2022-03-01 17:50:46,189 INFO L226 Difference]: Without dead ends: 3428 [2022-03-01 17:50:46,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:50:46,190 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 205 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:46,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 349 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:50:46,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3428 states. [2022-03-01 17:50:46,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3428 to 3105. [2022-03-01 17:50:46,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3105 states, 3104 states have (on average 4.555412371134021) internal successors, (14140), 3104 states have internal predecessors, (14140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:46,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3105 states to 3105 states and 14140 transitions. [2022-03-01 17:50:46,247 INFO L78 Accepts]: Start accepts. Automaton has 3105 states and 14140 transitions. Word has length 29 [2022-03-01 17:50:46,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:46,247 INFO L470 AbstractCegarLoop]: Abstraction has 3105 states and 14140 transitions. [2022-03-01 17:50:46,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:46,247 INFO L276 IsEmpty]: Start isEmpty. Operand 3105 states and 14140 transitions. [2022-03-01 17:50:46,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:46,252 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:46,253 INFO L514 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] [2022-03-01 17:50:46,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:46,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:46,455 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:46,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:46,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1376425363, now seen corresponding path program 28 times [2022-03-01 17:50:46,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:46,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089520635] [2022-03-01 17:50:46,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:46,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:46,576 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:46,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089520635] [2022-03-01 17:50:46,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089520635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:46,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367702827] [2022-03-01 17:50:46,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:50:46,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:46,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:46,577 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) [2022-03-01 17:50:46,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-01 17:50:46,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:50:46,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:46,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:46,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:46,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:50:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:46,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:46,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:46,910 INFO L387 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 17 treesize of output 22 [2022-03-01 17:50:46,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:46,935 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:50:46,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:46,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367702827] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:46,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:46,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-01 17:50:46,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262932969] [2022-03-01 17:50:46,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:46,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:50:46,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:46,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:50:46,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:50:46,967 INFO L87 Difference]: Start difference. First operand 3105 states and 14140 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:47,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:47,760 INFO L93 Difference]: Finished difference Result 3817 states and 16664 transitions. [2022-03-01 17:50:47,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:50:47,760 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:47,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:47,770 INFO L225 Difference]: With dead ends: 3817 [2022-03-01 17:50:47,770 INFO L226 Difference]: Without dead ends: 3779 [2022-03-01 17:50:47,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:50:47,770 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 381 mSDsluCounter, 1392 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:47,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 542 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:50:47,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3779 states. [2022-03-01 17:50:47,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3779 to 3105. [2022-03-01 17:50:47,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3105 states, 3104 states have (on average 4.555412371134021) internal successors, (14140), 3104 states have internal predecessors, (14140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:47,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3105 states to 3105 states and 14140 transitions. [2022-03-01 17:50:47,830 INFO L78 Accepts]: Start accepts. Automaton has 3105 states and 14140 transitions. Word has length 29 [2022-03-01 17:50:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:47,830 INFO L470 AbstractCegarLoop]: Abstraction has 3105 states and 14140 transitions. [2022-03-01 17:50:47,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:47,830 INFO L276 IsEmpty]: Start isEmpty. Operand 3105 states and 14140 transitions. [2022-03-01 17:50:47,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-01 17:50:47,836 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:47,836 INFO L514 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] [2022-03-01 17:50:47,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:48,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:48,053 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:48,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:48,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1595564283, now seen corresponding path program 29 times [2022-03-01 17:50:48,053 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:48,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836895970] [2022-03-01 17:50:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:48,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:48,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:48,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:48,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836895970] [2022-03-01 17:50:48,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836895970] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:48,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154572988] [2022-03-01 17:50:48,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:50:48,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:48,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:48,117 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) [2022-03-01 17:50:48,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-01 17:50:48,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:50:48,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:48,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:50:48,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:48,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:50:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:48,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:48,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:48,393 INFO L387 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 17 treesize of output 22 [2022-03-01 17:50:48,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:48,400 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:50:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:48,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154572988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:48,431 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:48,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:50:48,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591522470] [2022-03-01 17:50:48,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:48,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:50:48,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:48,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:50:48,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:50:48,431 INFO L87 Difference]: Start difference. First operand 3105 states and 14140 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:48,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:48,982 INFO L93 Difference]: Finished difference Result 3772 states and 16519 transitions. [2022-03-01 17:50:48,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:50:48,982 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-01 17:50:48,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:48,992 INFO L225 Difference]: With dead ends: 3772 [2022-03-01 17:50:48,992 INFO L226 Difference]: Without dead ends: 3750 [2022-03-01 17:50:48,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:50:48,993 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 356 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:48,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 399 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:50:48,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3750 states. [2022-03-01 17:50:49,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3750 to 3063. [2022-03-01 17:50:49,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3062 states have (on average 4.561071195297191) internal successors, (13966), 3062 states have internal predecessors, (13966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:49,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 13966 transitions. [2022-03-01 17:50:49,050 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 13966 transitions. Word has length 29 [2022-03-01 17:50:49,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:49,050 INFO L470 AbstractCegarLoop]: Abstraction has 3063 states and 13966 transitions. [2022-03-01 17:50:49,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:49,050 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 13966 transitions. [2022-03-01 17:50:49,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 17:50:49,055 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:49,055 INFO L514 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] [2022-03-01 17:50:49,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:49,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:49,269 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:49,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:49,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1771622066, now seen corresponding path program 30 times [2022-03-01 17:50:49,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:49,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270727537] [2022-03-01 17:50:49,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:49,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:49,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:49,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:49,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270727537] [2022-03-01 17:50:49,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270727537] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:49,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975844558] [2022-03-01 17:50:49,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:50:49,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:49,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:49,292 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) [2022-03-01 17:50:49,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-01 17:50:49,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:50:49,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:49,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:50:49,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:49,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:49,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:49,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975844558] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:49,452 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:49,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 7 [2022-03-01 17:50:49,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488784227] [2022-03-01 17:50:49,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:49,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:50:49,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:49,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:50:49,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:50:49,452 INFO L87 Difference]: Start difference. First operand 3063 states and 13966 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:49,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:49,572 INFO L93 Difference]: Finished difference Result 4340 states and 18961 transitions. [2022-03-01 17:50:49,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:50:49,572 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-01 17:50:49,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:49,583 INFO L225 Difference]: With dead ends: 4340 [2022-03-01 17:50:49,583 INFO L226 Difference]: Without dead ends: 4261 [2022-03-01 17:50:49,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:50:49,583 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 138 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:49,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 125 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:50:49,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2022-03-01 17:50:49,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 3845. [2022-03-01 17:50:49,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3845 states, 3844 states have (on average 4.522372528616025) internal successors, (17384), 3844 states have internal predecessors, (17384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:49,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3845 states to 3845 states and 17384 transitions. [2022-03-01 17:50:49,651 INFO L78 Accepts]: Start accepts. Automaton has 3845 states and 17384 transitions. Word has length 31 [2022-03-01 17:50:49,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:49,651 INFO L470 AbstractCegarLoop]: Abstraction has 3845 states and 17384 transitions. [2022-03-01 17:50:49,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:49,651 INFO L276 IsEmpty]: Start isEmpty. Operand 3845 states and 17384 transitions. [2022-03-01 17:50:49,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 17:50:49,658 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:49,658 INFO L514 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] [2022-03-01 17:50:49,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-03-01 17:50:49,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-01 17:50:49,863 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:49,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:49,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1488366286, now seen corresponding path program 31 times [2022-03-01 17:50:49,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:49,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930985406] [2022-03-01 17:50:49,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:49,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:49,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:49,892 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:49,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930985406] [2022-03-01 17:50:49,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930985406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:49,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529506266] [2022-03-01 17:50:49,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:50:49,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:49,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:49,893 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) [2022-03-01 17:50:49,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-01 17:50:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:49,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:50:49,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:49,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:50,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:50,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529506266] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:50,012 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:50,012 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-03-01 17:50:50,012 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842076094] [2022-03-01 17:50:50,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:50,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:50:50,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:50,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:50:50,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:50:50,012 INFO L87 Difference]: Start difference. First operand 3845 states and 17384 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:50,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:50,115 INFO L93 Difference]: Finished difference Result 4766 states and 20563 transitions. [2022-03-01 17:50:50,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:50:50,115 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-01 17:50:50,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:50,126 INFO L225 Difference]: With dead ends: 4766 [2022-03-01 17:50:50,126 INFO L226 Difference]: Without dead ends: 4649 [2022-03-01 17:50:50,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:50:50,127 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 216 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:50,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 96 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:50:50,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4649 states. [2022-03-01 17:50:50,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4649 to 3802. [2022-03-01 17:50:50,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3802 states, 3801 states have (on average 4.468297816364115) internal successors, (16984), 3801 states have internal predecessors, (16984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:50,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3802 states to 3802 states and 16984 transitions. [2022-03-01 17:50:50,205 INFO L78 Accepts]: Start accepts. Automaton has 3802 states and 16984 transitions. Word has length 31 [2022-03-01 17:50:50,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:50,205 INFO L470 AbstractCegarLoop]: Abstraction has 3802 states and 16984 transitions. [2022-03-01 17:50:50,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:50,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3802 states and 16984 transitions. [2022-03-01 17:50:50,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 17:50:50,212 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:50,212 INFO L514 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] [2022-03-01 17:50:50,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:50,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-01 17:50:50,427 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:50,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:50,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1280168432, now seen corresponding path program 32 times [2022-03-01 17:50:50,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:50,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075885342] [2022-03-01 17:50:50,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:50,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:50,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:50,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:50,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075885342] [2022-03-01 17:50:50,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075885342] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:50,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593940983] [2022-03-01 17:50:50,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:50:50,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:50,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:50,451 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) [2022-03-01 17:50:50,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-01 17:50:50,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:50:50,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:50,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:50:50,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:50,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:50,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:50,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593940983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:50,557 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:50,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-01 17:50:50,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384135802] [2022-03-01 17:50:50,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:50,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:50:50,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:50,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:50:50,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:50:50,557 INFO L87 Difference]: Start difference. First operand 3802 states and 16984 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:50,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:50,779 INFO L93 Difference]: Finished difference Result 6625 states and 27941 transitions. [2022-03-01 17:50:50,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:50:50,779 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-01 17:50:50,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:50,797 INFO L225 Difference]: With dead ends: 6625 [2022-03-01 17:50:50,797 INFO L226 Difference]: Without dead ends: 6329 [2022-03-01 17:50:50,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:50:50,797 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 331 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:50,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 415 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:50:50,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6329 states. [2022-03-01 17:50:50,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6329 to 5398. [2022-03-01 17:50:50,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5398 states, 5397 states have (on average 4.405039836946452) internal successors, (23774), 5397 states have internal predecessors, (23774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:50,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5398 states to 5398 states and 23774 transitions. [2022-03-01 17:50:50,920 INFO L78 Accepts]: Start accepts. Automaton has 5398 states and 23774 transitions. Word has length 31 [2022-03-01 17:50:50,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:50,921 INFO L470 AbstractCegarLoop]: Abstraction has 5398 states and 23774 transitions. [2022-03-01 17:50:50,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:50,921 INFO L276 IsEmpty]: Start isEmpty. Operand 5398 states and 23774 transitions. [2022-03-01 17:50:50,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 17:50:50,954 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:50,954 INFO L514 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] [2022-03-01 17:50:50,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:51,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-01 17:50:51,163 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:51,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:51,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1366492460, now seen corresponding path program 33 times [2022-03-01 17:50:51,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:51,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143811227] [2022-03-01 17:50:51,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:51,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:51,183 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:51,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143811227] [2022-03-01 17:50:51,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143811227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:51,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816991931] [2022-03-01 17:50:51,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:50:51,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:51,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:51,185 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) [2022-03-01 17:50:51,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-01 17:50:51,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:50:51,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:51,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:50:51,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:51,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:51,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816991931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:51,273 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:51,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-01 17:50:51,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850577763] [2022-03-01 17:50:51,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:51,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:50:51,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:51,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:50:51,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:50:51,274 INFO L87 Difference]: Start difference. First operand 5398 states and 23774 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) [2022-03-01 17:50:51,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:51,376 INFO L93 Difference]: Finished difference Result 6291 states and 26930 transitions. [2022-03-01 17:50:51,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:50:51,376 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 [2022-03-01 17:50:51,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:51,392 INFO L225 Difference]: With dead ends: 6291 [2022-03-01 17:50:51,392 INFO L226 Difference]: Without dead ends: 6219 [2022-03-01 17:50:51,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:50:51,392 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 143 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:51,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 119 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:50:51,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6219 states. [2022-03-01 17:50:51,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6219 to 5455. [2022-03-01 17:50:51,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5455 states, 5454 states have (on average 4.364869820315365) internal successors, (23806), 5454 states have internal predecessors, (23806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:51,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5455 states to 5455 states and 23806 transitions. [2022-03-01 17:50:51,488 INFO L78 Accepts]: Start accepts. Automaton has 5455 states and 23806 transitions. Word has length 31 [2022-03-01 17:50:51,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:51,488 INFO L470 AbstractCegarLoop]: Abstraction has 5455 states and 23806 transitions. [2022-03-01 17:50:51,488 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) [2022-03-01 17:50:51,488 INFO L276 IsEmpty]: Start isEmpty. Operand 5455 states and 23806 transitions. [2022-03-01 17:50:51,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 17:50:51,497 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:51,497 INFO L514 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] [2022-03-01 17:50:51,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:51,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-03-01 17:50:51,713 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:51,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:51,713 INFO L85 PathProgramCache]: Analyzing trace with hash -540684862, now seen corresponding path program 34 times [2022-03-01 17:50:51,714 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:51,714 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860606800] [2022-03-01 17:50:51,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:51,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:51,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:51,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860606800] [2022-03-01 17:50:51,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860606800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:51,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311101854] [2022-03-01 17:50:51,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:50:51,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:51,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:51,736 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) [2022-03-01 17:50:51,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-01 17:50:51,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:50:51,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:51,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:50:51,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:51,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:51,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:51,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311101854] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:51,886 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:51,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 7 [2022-03-01 17:50:51,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268146478] [2022-03-01 17:50:51,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:51,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:50:51,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:51,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:50:51,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:50:51,887 INFO L87 Difference]: Start difference. First operand 5455 states and 23806 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:51,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:51,992 INFO L93 Difference]: Finished difference Result 7534 states and 32027 transitions. [2022-03-01 17:50:51,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:50:51,992 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-01 17:50:51,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:52,012 INFO L225 Difference]: With dead ends: 7534 [2022-03-01 17:50:52,012 INFO L226 Difference]: Without dead ends: 7474 [2022-03-01 17:50:52,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:50:52,012 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 181 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:52,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 125 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:50:52,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7474 states. [2022-03-01 17:50:52,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7474 to 6583. [2022-03-01 17:50:52,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6583 states, 6582 states have (on average 4.39364934670313) internal successors, (28919), 6582 states have internal predecessors, (28919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:52,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6583 states to 6583 states and 28919 transitions. [2022-03-01 17:50:52,148 INFO L78 Accepts]: Start accepts. Automaton has 6583 states and 28919 transitions. Word has length 31 [2022-03-01 17:50:52,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:52,148 INFO L470 AbstractCegarLoop]: Abstraction has 6583 states and 28919 transitions. [2022-03-01 17:50:52,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:52,148 INFO L276 IsEmpty]: Start isEmpty. Operand 6583 states and 28919 transitions. [2022-03-01 17:50:52,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 17:50:52,161 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:52,161 INFO L514 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] [2022-03-01 17:50:52,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:52,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:52,373 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:52,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:52,374 INFO L85 PathProgramCache]: Analyzing trace with hash 552518790, now seen corresponding path program 35 times [2022-03-01 17:50:52,375 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:52,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22706832] [2022-03-01 17:50:52,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:52,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:52,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:52,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:52,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22706832] [2022-03-01 17:50:52,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22706832] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:52,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726856938] [2022-03-01 17:50:52,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:50:52,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:52,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:52,418 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) [2022-03-01 17:50:52,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-01 17:50:52,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:50:52,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:52,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:50:52,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:52,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:52,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:52,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726856938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:52,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:52,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2022-03-01 17:50:52,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729685270] [2022-03-01 17:50:52,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:52,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:50:52,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:52,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:50:52,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:50:52,561 INFO L87 Difference]: Start difference. First operand 6583 states and 28919 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:52,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:52,714 INFO L93 Difference]: Finished difference Result 8243 states and 34954 transitions. [2022-03-01 17:50:52,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:50:52,714 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-01 17:50:52,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:52,738 INFO L225 Difference]: With dead ends: 8243 [2022-03-01 17:50:52,738 INFO L226 Difference]: Without dead ends: 8171 [2022-03-01 17:50:52,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:50:52,740 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 179 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:52,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 88 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:50:52,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8171 states. [2022-03-01 17:50:52,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8171 to 6493. [2022-03-01 17:50:52,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6493 states, 6492 states have (on average 4.386167590881084) internal successors, (28475), 6492 states have internal predecessors, (28475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:52,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6493 states to 6493 states and 28475 transitions. [2022-03-01 17:50:52,884 INFO L78 Accepts]: Start accepts. Automaton has 6493 states and 28475 transitions. Word has length 31 [2022-03-01 17:50:52,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:52,898 INFO L470 AbstractCegarLoop]: Abstraction has 6493 states and 28475 transitions. [2022-03-01 17:50:52,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:52,898 INFO L276 IsEmpty]: Start isEmpty. Operand 6493 states and 28475 transitions. [2022-03-01 17:50:52,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 17:50:52,919 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:52,919 INFO L514 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] [2022-03-01 17:50:52,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:53,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:53,135 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:53,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:53,135 INFO L85 PathProgramCache]: Analyzing trace with hash 891076900, now seen corresponding path program 36 times [2022-03-01 17:50:53,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:53,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021131607] [2022-03-01 17:50:53,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:53,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:53,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:53,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:53,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021131607] [2022-03-01 17:50:53,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021131607] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:53,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923430209] [2022-03-01 17:50:53,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:50:53,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:53,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:53,156 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) [2022-03-01 17:50:53,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-01 17:50:53,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:50:53,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:53,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:50:53,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:53,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:53,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923430209] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:53,272 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:53,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 7 [2022-03-01 17:50:53,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916282613] [2022-03-01 17:50:53,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:53,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-01 17:50:53,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:53,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-01 17:50:53,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:50:53,273 INFO L87 Difference]: Start difference. First operand 6493 states and 28475 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:53,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:53,410 INFO L93 Difference]: Finished difference Result 8162 states and 34539 transitions. [2022-03-01 17:50:53,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:50:53,410 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-01 17:50:53,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:53,431 INFO L225 Difference]: With dead ends: 8162 [2022-03-01 17:50:53,431 INFO L226 Difference]: Without dead ends: 8084 [2022-03-01 17:50:53,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:50:53,432 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 155 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:53,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 120 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:50:53,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8084 states. [2022-03-01 17:50:53,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8084 to 6864. [2022-03-01 17:50:53,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6864 states, 6863 states have (on average 4.390936908057701) internal successors, (30135), 6863 states have internal predecessors, (30135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:53,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6864 states to 6864 states and 30135 transitions. [2022-03-01 17:50:53,574 INFO L78 Accepts]: Start accepts. Automaton has 6864 states and 30135 transitions. Word has length 31 [2022-03-01 17:50:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:53,574 INFO L470 AbstractCegarLoop]: Abstraction has 6864 states and 30135 transitions. [2022-03-01 17:50:53,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:53,575 INFO L276 IsEmpty]: Start isEmpty. Operand 6864 states and 30135 transitions. [2022-03-01 17:50:53,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-01 17:50:53,588 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:53,588 INFO L514 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] [2022-03-01 17:50:53,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:53,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-03-01 17:50:53,800 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:53,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:53,800 INFO L85 PathProgramCache]: Analyzing trace with hash -457763008, now seen corresponding path program 37 times [2022-03-01 17:50:53,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:53,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665437748] [2022-03-01 17:50:53,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:53,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:53,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:53,820 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:53,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665437748] [2022-03-01 17:50:53,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665437748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:53,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160779536] [2022-03-01 17:50:53,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:50:53,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:53,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:53,825 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) [2022-03-01 17:50:53,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-01 17:50:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:53,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:50:53,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:53,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:53,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:53,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:53,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160779536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:53,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:53,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-03-01 17:50:53,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134705237] [2022-03-01 17:50:53,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:53,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:50:53,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:53,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:50:53,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:50:53,924 INFO L87 Difference]: Start difference. First operand 6864 states and 30135 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:54,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:54,127 INFO L93 Difference]: Finished difference Result 8640 states and 36644 transitions. [2022-03-01 17:50:54,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:50:54,127 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-01 17:50:54,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:54,153 INFO L225 Difference]: With dead ends: 8640 [2022-03-01 17:50:54,153 INFO L226 Difference]: Without dead ends: 8442 [2022-03-01 17:50:54,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:50:54,154 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 165 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:54,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 274 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:50:54,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8442 states. [2022-03-01 17:50:54,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8442 to 7525. [2022-03-01 17:50:54,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7525 states, 7524 states have (on average 4.365629984051036) internal successors, (32847), 7524 states have internal predecessors, (32847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:54,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7525 states to 7525 states and 32847 transitions. [2022-03-01 17:50:54,333 INFO L78 Accepts]: Start accepts. Automaton has 7525 states and 32847 transitions. Word has length 31 [2022-03-01 17:50:54,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:54,333 INFO L470 AbstractCegarLoop]: Abstraction has 7525 states and 32847 transitions. [2022-03-01 17:50:54,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:54,333 INFO L276 IsEmpty]: Start isEmpty. Operand 7525 states and 32847 transitions. [2022-03-01 17:50:54,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:50:54,349 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:54,349 INFO L514 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] [2022-03-01 17:50:54,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:54,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-03-01 17:50:54,565 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:54,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:54,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1383538257, now seen corresponding path program 38 times [2022-03-01 17:50:54,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:54,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580367733] [2022-03-01 17:50:54,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:54,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:54,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:54,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580367733] [2022-03-01 17:50:54,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580367733] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:54,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571760813] [2022-03-01 17:50:54,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:50:54,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:54,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:54,791 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) [2022-03-01 17:50:54,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-01 17:50:54,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:50:54,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:54,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:50:54,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:55,248 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:55,248 INFO L387 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 20 treesize of output 36 [2022-03-01 17:50:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:55,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:56,050 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:50:56,050 INFO L387 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 17 treesize of output 22 [2022-03-01 17:50:56,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:50:56,059 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:50:56,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:56,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571760813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:56,107 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:56,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-01 17:50:56,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022964350] [2022-03-01 17:50:56,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:56,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:50:56,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:56,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:50:56,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:50:56,108 INFO L87 Difference]: Start difference. First operand 7525 states and 32847 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:57,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:50:57,623 INFO L93 Difference]: Finished difference Result 8385 states and 36348 transitions. [2022-03-01 17:50:57,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:50:57,623 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:50:57,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:50:57,646 INFO L225 Difference]: With dead ends: 8385 [2022-03-01 17:50:57,646 INFO L226 Difference]: Without dead ends: 8374 [2022-03-01 17:50:57,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:50:57,647 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 278 mSDsluCounter, 2353 mSDsCounter, 0 mSdLazyCounter, 2634 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 2894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:50:57,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 921 Invalid, 2894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2634 Invalid, 0 Unknown, 230 Unchecked, 1.0s Time] [2022-03-01 17:50:57,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8374 states. [2022-03-01 17:50:57,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8374 to 7658. [2022-03-01 17:50:57,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7658 states, 7657 states have (on average 4.354969309128902) internal successors, (33346), 7657 states have internal predecessors, (33346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:57,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7658 states to 7658 states and 33346 transitions. [2022-03-01 17:50:57,792 INFO L78 Accepts]: Start accepts. Automaton has 7658 states and 33346 transitions. Word has length 33 [2022-03-01 17:50:57,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:50:57,793 INFO L470 AbstractCegarLoop]: Abstraction has 7658 states and 33346 transitions. [2022-03-01 17:50:57,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:50:57,793 INFO L276 IsEmpty]: Start isEmpty. Operand 7658 states and 33346 transitions. [2022-03-01 17:50:57,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:50:57,807 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:50:57,807 INFO L514 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] [2022-03-01 17:50:57,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-03-01 17:50:58,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:58,023 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:50:58,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:50:58,023 INFO L85 PathProgramCache]: Analyzing trace with hash 565140729, now seen corresponding path program 39 times [2022-03-01 17:50:58,023 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:50:58,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168448228] [2022-03-01 17:50:58,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:50:58,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:50:58,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:50:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:58,174 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:50:58,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168448228] [2022-03-01 17:50:58,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168448228] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:50:58,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136324284] [2022-03-01 17:50:58,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:50:58,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:50:58,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:50:58,175 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) [2022-03-01 17:50:58,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-01 17:50:58,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:50:58,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:50:58,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 17:50:58,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:50:58,598 INFO L353 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2022-03-01 17:50:58,598 INFO L387 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 26 treesize of output 50 [2022-03-01 17:50:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:58,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:50:59,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:50:59,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136324284] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:50:59,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:50:59,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-03-01 17:50:59,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403090751] [2022-03-01 17:50:59,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:50:59,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 17:50:59,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:50:59,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 17:50:59,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:50:59,062 INFO L87 Difference]: Start difference. First operand 7658 states and 33346 transitions. Second operand has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:02,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:02,253 INFO L93 Difference]: Finished difference Result 9540 states and 40443 transitions. [2022-03-01 17:51:02,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-01 17:51:02,253 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:51:02,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:02,282 INFO L225 Difference]: With dead ends: 9540 [2022-03-01 17:51:02,282 INFO L226 Difference]: Without dead ends: 9494 [2022-03-01 17:51:02,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=577, Invalid=6065, Unknown=0, NotChecked=0, Total=6642 [2022-03-01 17:51:02,283 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 1049 mSDsluCounter, 3266 mSDsCounter, 0 mSdLazyCounter, 4102 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1049 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 4265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 4102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:02,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1049 Valid, 1221 Invalid, 4265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 4102 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-01 17:51:02,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9494 states. [2022-03-01 17:51:02,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9494 to 7670. [2022-03-01 17:51:02,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7670 states, 7669 states have (on average 4.362759160255575) internal successors, (33458), 7669 states have internal predecessors, (33458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:02,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7670 states to 7670 states and 33458 transitions. [2022-03-01 17:51:02,460 INFO L78 Accepts]: Start accepts. Automaton has 7670 states and 33458 transitions. Word has length 33 [2022-03-01 17:51:02,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:02,460 INFO L470 AbstractCegarLoop]: Abstraction has 7670 states and 33458 transitions. [2022-03-01 17:51:02,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:02,461 INFO L276 IsEmpty]: Start isEmpty. Operand 7670 states and 33458 transitions. [2022-03-01 17:51:02,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:51:02,477 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:02,477 INFO L514 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] [2022-03-01 17:51:02,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-03-01 17:51:02,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:02,694 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:02,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:02,694 INFO L85 PathProgramCache]: Analyzing trace with hash 692613113, now seen corresponding path program 40 times [2022-03-01 17:51:02,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:02,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11472386] [2022-03-01 17:51:02,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:02,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:02,881 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:02,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11472386] [2022-03-01 17:51:02,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11472386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:02,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087981814] [2022-03-01 17:51:02,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:51:02,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:02,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:02,883 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) [2022-03-01 17:51:02,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-01 17:51:02,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:51:02,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:02,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:51:02,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:03,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:03,228 INFO L387 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 37 treesize of output 21 [2022-03-01 17:51:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:03,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:03,581 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:51:03,581 INFO L387 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 27 treesize of output 48 [2022-03-01 17:51:03,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:03,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:03,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:03,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:03,669 INFO L387 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 27 treesize of output 7 [2022-03-01 17:51:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:03,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087981814] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:03,710 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:03,710 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 17:51:03,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960692432] [2022-03-01 17:51:03,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:03,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:51:03,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:03,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:51:03,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:51:03,711 INFO L87 Difference]: Start difference. First operand 7670 states and 33458 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:05,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:05,518 INFO L93 Difference]: Finished difference Result 8309 states and 35933 transitions. [2022-03-01 17:51:05,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:51:05,518 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:51:05,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:05,543 INFO L225 Difference]: With dead ends: 8309 [2022-03-01 17:51:05,543 INFO L226 Difference]: Without dead ends: 8290 [2022-03-01 17:51:05,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=2248, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 17:51:05,543 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 326 mSDsluCounter, 2771 mSDsCounter, 0 mSdLazyCounter, 3477 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 3501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 3477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:05,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 1073 Invalid, 3501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 3477 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-01 17:51:05,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2022-03-01 17:51:05,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 7729. [2022-03-01 17:51:05,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7729 states, 7728 states have (on average 4.359989648033126) internal successors, (33694), 7728 states have internal predecessors, (33694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:05,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7729 states to 7729 states and 33694 transitions. [2022-03-01 17:51:05,710 INFO L78 Accepts]: Start accepts. Automaton has 7729 states and 33694 transitions. Word has length 33 [2022-03-01 17:51:05,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:05,710 INFO L470 AbstractCegarLoop]: Abstraction has 7729 states and 33694 transitions. [2022-03-01 17:51:05,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:05,710 INFO L276 IsEmpty]: Start isEmpty. Operand 7729 states and 33694 transitions. [2022-03-01 17:51:05,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:51:05,726 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:05,726 INFO L514 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] [2022-03-01 17:51:05,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:05,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:05,943 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:05,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:05,943 INFO L85 PathProgramCache]: Analyzing trace with hash 241367945, now seen corresponding path program 41 times [2022-03-01 17:51:05,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:05,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004044830] [2022-03-01 17:51:05,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:05,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:06,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:06,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004044830] [2022-03-01 17:51:06,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004044830] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:06,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948620761] [2022-03-01 17:51:06,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:51:06,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:06,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:06,148 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) [2022-03-01 17:51:06,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-01 17:51:06,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:51:06,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:06,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:51:06,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:06,638 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-03-01 17:51:06,638 INFO L387 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 81 treesize of output 63 [2022-03-01 17:51:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:06,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:07,094 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:51:07,094 INFO L387 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 27 treesize of output 48 [2022-03-01 17:51:07,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:07,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:07,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:07,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:07,169 INFO L387 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 27 treesize of output 7 [2022-03-01 17:51:07,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:07,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948620761] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:07,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:07,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 17:51:07,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213441473] [2022-03-01 17:51:07,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:07,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:51:07,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:07,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:51:07,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:51:07,227 INFO L87 Difference]: Start difference. First operand 7729 states and 33694 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:09,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:09,307 INFO L93 Difference]: Finished difference Result 8675 states and 37341 transitions. [2022-03-01 17:51:09,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:51:09,308 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:51:09,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:09,333 INFO L225 Difference]: With dead ends: 8675 [2022-03-01 17:51:09,333 INFO L226 Difference]: Without dead ends: 8664 [2022-03-01 17:51:09,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=219, Invalid=2537, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:51:09,333 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 399 mSDsluCounter, 3025 mSDsCounter, 0 mSdLazyCounter, 3484 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 1339 SdHoareTripleChecker+Invalid, 3710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:09,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 1339 Invalid, 3710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 3484 Invalid, 0 Unknown, 201 Unchecked, 1.4s Time] [2022-03-01 17:51:09,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8664 states. [2022-03-01 17:51:09,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8664 to 7829. [2022-03-01 17:51:09,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7829 states, 7828 states have (on average 4.357051609606541) internal successors, (34107), 7828 states have internal predecessors, (34107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:09,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7829 states to 7829 states and 34107 transitions. [2022-03-01 17:51:09,500 INFO L78 Accepts]: Start accepts. Automaton has 7829 states and 34107 transitions. Word has length 33 [2022-03-01 17:51:09,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:09,501 INFO L470 AbstractCegarLoop]: Abstraction has 7829 states and 34107 transitions. [2022-03-01 17:51:09,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:09,501 INFO L276 IsEmpty]: Start isEmpty. Operand 7829 states and 34107 transitions. [2022-03-01 17:51:09,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:51:09,516 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:09,516 INFO L514 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] [2022-03-01 17:51:09,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:09,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-01 17:51:09,733 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:09,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:09,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1128871626, now seen corresponding path program 1 times [2022-03-01 17:51:09,733 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:09,733 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640842702] [2022-03-01 17:51:09,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:09,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:09,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:09,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640842702] [2022-03-01 17:51:09,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640842702] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:09,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173066691] [2022-03-01 17:51:09,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:09,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:09,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:09,977 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) [2022-03-01 17:51:09,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-01 17:51:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:10,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:51:10,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:10,375 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-03-01 17:51:10,375 INFO L387 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 81 treesize of output 63 [2022-03-01 17:51:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:10,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:10,737 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:51:10,737 INFO L387 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 27 treesize of output 48 [2022-03-01 17:51:10,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:10,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:10,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:10,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:10,795 INFO L387 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 27 treesize of output 7 [2022-03-01 17:51:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:10,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173066691] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:10,834 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:10,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 17:51:10,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450212443] [2022-03-01 17:51:10,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:10,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:51:10,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:10,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:51:10,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:51:10,835 INFO L87 Difference]: Start difference. First operand 7829 states and 34107 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:12,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:12,676 INFO L93 Difference]: Finished difference Result 8629 states and 37111 transitions. [2022-03-01 17:51:12,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:51:12,676 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:51:12,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:12,701 INFO L225 Difference]: With dead ends: 8629 [2022-03-01 17:51:12,701 INFO L226 Difference]: Without dead ends: 8616 [2022-03-01 17:51:12,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=243, Invalid=2619, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 17:51:12,702 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 475 mSDsluCounter, 2543 mSDsCounter, 0 mSdLazyCounter, 3137 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 3194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 3137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:12,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 1064 Invalid, 3194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 3137 Invalid, 0 Unknown, 24 Unchecked, 1.1s Time] [2022-03-01 17:51:12,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8616 states. [2022-03-01 17:51:12,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8616 to 7857. [2022-03-01 17:51:12,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7857 states, 7856 states have (on average 4.355269857433808) internal successors, (34215), 7856 states have internal predecessors, (34215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:12,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7857 states to 7857 states and 34215 transitions. [2022-03-01 17:51:12,933 INFO L78 Accepts]: Start accepts. Automaton has 7857 states and 34215 transitions. Word has length 33 [2022-03-01 17:51:12,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:12,933 INFO L470 AbstractCegarLoop]: Abstraction has 7857 states and 34215 transitions. [2022-03-01 17:51:12,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:12,933 INFO L276 IsEmpty]: Start isEmpty. Operand 7857 states and 34215 transitions. [2022-03-01 17:51:12,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:51:12,948 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:12,949 INFO L514 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] [2022-03-01 17:51:12,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-03-01 17:51:13,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-01 17:51:13,164 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:13,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:13,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1984178280, now seen corresponding path program 1 times [2022-03-01 17:51:13,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:13,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748403696] [2022-03-01 17:51:13,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:13,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:13,358 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:13,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748403696] [2022-03-01 17:51:13,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748403696] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:13,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793552839] [2022-03-01 17:51:13,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:13,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:13,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:13,360 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) [2022-03-01 17:51:13,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-01 17:51:13,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:13,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:51:13,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:13,803 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-03-01 17:51:13,803 INFO L387 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 81 treesize of output 63 [2022-03-01 17:51:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:13,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:14,125 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:51:14,125 INFO L387 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 27 treesize of output 48 [2022-03-01 17:51:14,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:14,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:14,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:14,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:14,186 INFO L387 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 27 treesize of output 7 [2022-03-01 17:51:14,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:14,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793552839] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:14,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:14,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 17:51:14,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676738234] [2022-03-01 17:51:14,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:14,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:51:14,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:14,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:51:14,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:51:14,236 INFO L87 Difference]: Start difference. First operand 7857 states and 34215 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:16,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:16,289 INFO L93 Difference]: Finished difference Result 8645 states and 37144 transitions. [2022-03-01 17:51:16,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:51:16,289 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:51:16,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:16,377 INFO L225 Difference]: With dead ends: 8645 [2022-03-01 17:51:16,377 INFO L226 Difference]: Without dead ends: 8632 [2022-03-01 17:51:16,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=243, Invalid=2619, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 17:51:16,378 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 407 mSDsluCounter, 2942 mSDsCounter, 0 mSdLazyCounter, 3538 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 3655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:16,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 1234 Invalid, 3655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3538 Invalid, 0 Unknown, 87 Unchecked, 1.3s Time] [2022-03-01 17:51:16,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8632 states. [2022-03-01 17:51:16,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8632 to 7849. [2022-03-01 17:51:16,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7849 states, 7848 states have (on average 4.356651376146789) internal successors, (34191), 7848 states have internal predecessors, (34191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:16,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7849 states to 7849 states and 34191 transitions. [2022-03-01 17:51:16,519 INFO L78 Accepts]: Start accepts. Automaton has 7849 states and 34191 transitions. Word has length 33 [2022-03-01 17:51:16,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:16,519 INFO L470 AbstractCegarLoop]: Abstraction has 7849 states and 34191 transitions. [2022-03-01 17:51:16,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:16,519 INFO L276 IsEmpty]: Start isEmpty. Operand 7849 states and 34191 transitions. [2022-03-01 17:51:16,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:51:16,534 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:16,534 INFO L514 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] [2022-03-01 17:51:16,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-03-01 17:51:16,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-03-01 17:51:16,747 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:16,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:16,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1423285335, now seen corresponding path program 1 times [2022-03-01 17:51:16,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:16,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055369619] [2022-03-01 17:51:16,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:16,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:16,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:16,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:16,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055369619] [2022-03-01 17:51:16,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055369619] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:16,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661437029] [2022-03-01 17:51:16,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:16,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:16,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:16,901 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) [2022-03-01 17:51:16,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-01 17:51:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:16,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:51:16,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:17,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:17,228 INFO L387 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 37 treesize of output 21 [2022-03-01 17:51:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:17,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:17,524 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:51:17,524 INFO L387 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 27 treesize of output 48 [2022-03-01 17:51:17,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:17,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:17,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:17,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:17,567 INFO L387 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 27 treesize of output 7 [2022-03-01 17:51:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:17,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661437029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:17,599 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:17,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 17:51:17,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707671397] [2022-03-01 17:51:17,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:17,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:51:17,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:17,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:51:17,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:51:17,599 INFO L87 Difference]: Start difference. First operand 7849 states and 34191 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:19,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:19,430 INFO L93 Difference]: Finished difference Result 8653 states and 37168 transitions. [2022-03-01 17:51:19,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 17:51:19,430 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:51:19,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:19,454 INFO L225 Difference]: With dead ends: 8653 [2022-03-01 17:51:19,454 INFO L226 Difference]: Without dead ends: 8611 [2022-03-01 17:51:19,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=255, Invalid=2825, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 17:51:19,455 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 435 mSDsluCounter, 3318 mSDsCounter, 0 mSdLazyCounter, 4272 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 4303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 4272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:19,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 1325 Invalid, 4303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 4272 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-01 17:51:19,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8611 states. [2022-03-01 17:51:19,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8611 to 7789. [2022-03-01 17:51:19,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7789 states, 7788 states have (on average 4.363764766307139) internal successors, (33985), 7788 states have internal predecessors, (33985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:19,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7789 states to 7789 states and 33985 transitions. [2022-03-01 17:51:19,612 INFO L78 Accepts]: Start accepts. Automaton has 7789 states and 33985 transitions. Word has length 33 [2022-03-01 17:51:19,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:19,613 INFO L470 AbstractCegarLoop]: Abstraction has 7789 states and 33985 transitions. [2022-03-01 17:51:19,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:19,613 INFO L276 IsEmpty]: Start isEmpty. Operand 7789 states and 33985 transitions. [2022-03-01 17:51:19,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:51:19,628 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:19,629 INFO L514 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] [2022-03-01 17:51:19,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:19,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-01 17:51:19,844 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:19,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:19,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1341675749, now seen corresponding path program 42 times [2022-03-01 17:51:19,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:19,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873081684] [2022-03-01 17:51:19,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:19,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:19,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:19,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:19,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873081684] [2022-03-01 17:51:19,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873081684] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:19,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496518223] [2022-03-01 17:51:19,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:51:19,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:19,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:19,973 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) [2022-03-01 17:51:19,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-01 17:51:20,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:51:20,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:20,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:51:20,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:20,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:20,260 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-03-01 17:51:20,261 INFO L387 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 [2022-03-01 17:51:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:20,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:20,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:20,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496518223] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:20,790 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:20,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-01 17:51:20,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165864048] [2022-03-01 17:51:20,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:20,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:51:20,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:20,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:51:20,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1086, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:51:20,791 INFO L87 Difference]: Start difference. First operand 7789 states and 33985 transitions. Second operand has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:24,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:24,509 INFO L93 Difference]: Finished difference Result 9429 states and 39923 transitions. [2022-03-01 17:51:24,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-01 17:51:24,510 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:51:24,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:24,536 INFO L225 Difference]: With dead ends: 9429 [2022-03-01 17:51:24,536 INFO L226 Difference]: Without dead ends: 9391 [2022-03-01 17:51:24,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=630, Invalid=6510, Unknown=0, NotChecked=0, Total=7140 [2022-03-01 17:51:24,537 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 1010 mSDsluCounter, 3430 mSDsCounter, 0 mSdLazyCounter, 4241 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1010 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 4406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 4241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:24,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1010 Valid, 1371 Invalid, 4406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 4241 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-01 17:51:24,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9391 states. [2022-03-01 17:51:24,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9391 to 7804. [2022-03-01 17:51:24,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7804 states, 7803 states have (on average 4.362040240932974) internal successors, (34037), 7803 states have internal predecessors, (34037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:24,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7804 states to 7804 states and 34037 transitions. [2022-03-01 17:51:24,751 INFO L78 Accepts]: Start accepts. Automaton has 7804 states and 34037 transitions. Word has length 33 [2022-03-01 17:51:24,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:24,751 INFO L470 AbstractCegarLoop]: Abstraction has 7804 states and 34037 transitions. [2022-03-01 17:51:24,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:24,751 INFO L276 IsEmpty]: Start isEmpty. Operand 7804 states and 34037 transitions. [2022-03-01 17:51:24,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:51:24,765 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:24,765 INFO L514 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] [2022-03-01 17:51:24,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-03-01 17:51:24,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:24,981 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:24,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:24,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1905273173, now seen corresponding path program 43 times [2022-03-01 17:51:24,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:24,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704681460] [2022-03-01 17:51:24,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:24,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:25,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:25,143 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:25,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704681460] [2022-03-01 17:51:25,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704681460] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:25,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469994575] [2022-03-01 17:51:25,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:51:25,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:25,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:25,144 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) [2022-03-01 17:51:25,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-01 17:51:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:25,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:51:25,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:25,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:25,546 INFO L387 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 37 treesize of output 21 [2022-03-01 17:51:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:25,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:26,000 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:51:26,000 INFO L387 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 27 treesize of output 48 [2022-03-01 17:51:26,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:26,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:26,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:26,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:26,055 INFO L387 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 27 treesize of output 7 [2022-03-01 17:51:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:26,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469994575] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:26,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:26,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 17:51:26,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389415922] [2022-03-01 17:51:26,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:26,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:51:26,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:26,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:51:26,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:51:26,091 INFO L87 Difference]: Start difference. First operand 7804 states and 34037 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:28,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:28,698 INFO L93 Difference]: Finished difference Result 10276 states and 43727 transitions. [2022-03-01 17:51:28,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-01 17:51:28,698 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:51:28,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:28,737 INFO L225 Difference]: With dead ends: 10276 [2022-03-01 17:51:28,737 INFO L226 Difference]: Without dead ends: 10227 [2022-03-01 17:51:28,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=418, Invalid=4694, Unknown=0, NotChecked=0, Total=5112 [2022-03-01 17:51:28,738 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 811 mSDsluCounter, 3595 mSDsCounter, 0 mSdLazyCounter, 4202 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 4759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 4202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 472 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:28,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [811 Valid, 1362 Invalid, 4759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 4202 Invalid, 0 Unknown, 472 Unchecked, 1.6s Time] [2022-03-01 17:51:28,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10227 states. [2022-03-01 17:51:28,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10227 to 7888. [2022-03-01 17:51:28,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7888 states, 7887 states have (on average 4.363129199949284) internal successors, (34412), 7887 states have internal predecessors, (34412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:28,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7888 states to 7888 states and 34412 transitions. [2022-03-01 17:51:28,912 INFO L78 Accepts]: Start accepts. Automaton has 7888 states and 34412 transitions. Word has length 33 [2022-03-01 17:51:28,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:28,913 INFO L470 AbstractCegarLoop]: Abstraction has 7888 states and 34412 transitions. [2022-03-01 17:51:28,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:28,913 INFO L276 IsEmpty]: Start isEmpty. Operand 7888 states and 34412 transitions. [2022-03-01 17:51:28,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:51:28,928 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:28,928 INFO L514 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] [2022-03-01 17:51:28,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-03-01 17:51:29,143 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,SelfDestructingSolverStorable138 [2022-03-01 17:51:29,143 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:29,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:29,143 INFO L85 PathProgramCache]: Analyzing trace with hash 2018469117, now seen corresponding path program 44 times [2022-03-01 17:51:29,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:29,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107969803] [2022-03-01 17:51:29,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:29,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:29,328 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:29,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107969803] [2022-03-01 17:51:29,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107969803] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:29,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585489613] [2022-03-01 17:51:29,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:51:29,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:29,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:29,329 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:29,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-01 17:51:29,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:51:29,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:29,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:51:29,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:29,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:29,727 INFO L387 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 [2022-03-01 17:51:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:30,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:30,430 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:30,430 INFO L387 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 17 treesize of output 22 [2022-03-01 17:51:30,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:30,440 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:51:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:30,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585489613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:30,488 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:30,488 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-01 17:51:30,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108906077] [2022-03-01 17:51:30,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:30,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:51:30,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:30,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:51:30,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:51:30,489 INFO L87 Difference]: Start difference. First operand 7888 states and 34412 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:31,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:31,838 INFO L93 Difference]: Finished difference Result 8300 states and 35943 transitions. [2022-03-01 17:51:31,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:51:31,838 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:51:31,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:31,864 INFO L225 Difference]: With dead ends: 8300 [2022-03-01 17:51:31,864 INFO L226 Difference]: Without dead ends: 8289 [2022-03-01 17:51:31,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=203, Invalid=1603, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:51:31,865 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 343 mSDsluCounter, 1705 mSDsCounter, 0 mSdLazyCounter, 2173 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 2266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:31,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 678 Invalid, 2266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2173 Invalid, 0 Unknown, 54 Unchecked, 0.8s Time] [2022-03-01 17:51:31,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8289 states. [2022-03-01 17:51:31,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8289 to 7894. [2022-03-01 17:51:32,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7894 states, 7893 states have (on average 4.362219688331433) internal successors, (34431), 7893 states have internal predecessors, (34431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:32,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7894 states to 7894 states and 34431 transitions. [2022-03-01 17:51:32,026 INFO L78 Accepts]: Start accepts. Automaton has 7894 states and 34431 transitions. Word has length 33 [2022-03-01 17:51:32,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:32,026 INFO L470 AbstractCegarLoop]: Abstraction has 7894 states and 34431 transitions. [2022-03-01 17:51:32,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:32,026 INFO L276 IsEmpty]: Start isEmpty. Operand 7894 states and 34431 transitions. [2022-03-01 17:51:32,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:51:32,042 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:32,042 INFO L514 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] [2022-03-01 17:51:32,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-03-01 17:51:32,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:32,255 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:32,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:32,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1821955612, now seen corresponding path program 2 times [2022-03-01 17:51:32,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:32,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133718774] [2022-03-01 17:51:32,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:32,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:32,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:32,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133718774] [2022-03-01 17:51:32,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133718774] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:32,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834758003] [2022-03-01 17:51:32,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:51:32,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:32,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:32,432 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:32,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-01 17:51:32,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:51:32,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:32,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:51:32,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:32,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:32,800 INFO L387 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 33 treesize of output 49 [2022-03-01 17:51:33,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:33,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:33,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:51:33,301 INFO L387 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 17 treesize of output 22 [2022-03-01 17:51:33,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:33,309 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:51:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:33,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834758003] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:33,350 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:33,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-01 17:51:33,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270437691] [2022-03-01 17:51:33,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:33,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:51:33,351 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:33,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:51:33,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:51:33,351 INFO L87 Difference]: Start difference. First operand 7894 states and 34431 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:34,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:34,764 INFO L93 Difference]: Finished difference Result 8300 states and 35942 transitions. [2022-03-01 17:51:34,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:51:34,764 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:51:34,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:34,786 INFO L225 Difference]: With dead ends: 8300 [2022-03-01 17:51:34,786 INFO L226 Difference]: Without dead ends: 8287 [2022-03-01 17:51:34,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:51:34,786 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 272 mSDsluCounter, 2328 mSDsCounter, 0 mSdLazyCounter, 2787 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 3096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:34,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 892 Invalid, 3096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2787 Invalid, 0 Unknown, 279 Unchecked, 1.0s Time] [2022-03-01 17:51:34,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8287 states. [2022-03-01 17:51:34,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8287 to 7881. [2022-03-01 17:51:34,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7881 states, 7880 states have (on average 4.364213197969543) internal successors, (34390), 7880 states have internal predecessors, (34390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:34,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7881 states to 7881 states and 34390 transitions. [2022-03-01 17:51:34,932 INFO L78 Accepts]: Start accepts. Automaton has 7881 states and 34390 transitions. Word has length 33 [2022-03-01 17:51:34,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:34,932 INFO L470 AbstractCegarLoop]: Abstraction has 7881 states and 34390 transitions. [2022-03-01 17:51:34,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:34,932 INFO L276 IsEmpty]: Start isEmpty. Operand 7881 states and 34390 transitions. [2022-03-01 17:51:34,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:51:34,947 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:34,947 INFO L514 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] [2022-03-01 17:51:34,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-03-01 17:51:35,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:35,163 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:35,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:35,163 INFO L85 PathProgramCache]: Analyzing trace with hash -300920175, now seen corresponding path program 45 times [2022-03-01 17:51:35,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:35,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465943183] [2022-03-01 17:51:35,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:35,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:35,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:35,346 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:35,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465943183] [2022-03-01 17:51:35,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465943183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:35,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819062790] [2022-03-01 17:51:35,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:51:35,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:35,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:35,347 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:35,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-01 17:51:35,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:51:35,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:35,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 17:51:35,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:35,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:35,775 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-03-01 17:51:35,775 INFO L387 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 [2022-03-01 17:51:35,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:35,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:36,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819062790] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:36,409 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:36,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-01 17:51:36,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532651684] [2022-03-01 17:51:36,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:36,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:51:36,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:36,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:51:36,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:51:36,410 INFO L87 Difference]: Start difference. First operand 7881 states and 34390 transitions. Second operand has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:41,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:41,027 INFO L93 Difference]: Finished difference Result 10866 states and 45556 transitions. [2022-03-01 17:51:41,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-01 17:51:41,027 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:51:41,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:41,057 INFO L225 Difference]: With dead ends: 10866 [2022-03-01 17:51:41,057 INFO L226 Difference]: Without dead ends: 10828 [2022-03-01 17:51:41,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2099 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=753, Invalid=8177, Unknown=0, NotChecked=0, Total=8930 [2022-03-01 17:51:41,058 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 1115 mSDsluCounter, 4261 mSDsCounter, 0 mSdLazyCounter, 5170 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 1682 SdHoareTripleChecker+Invalid, 5356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 5170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:41,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1115 Valid, 1682 Invalid, 5356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 5170 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-01 17:51:41,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10828 states. [2022-03-01 17:51:41,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10828 to 7959. [2022-03-01 17:51:41,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7959 states, 7958 states have (on average 4.369188238250817) internal successors, (34770), 7958 states have internal predecessors, (34770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:41,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7959 states to 7959 states and 34770 transitions. [2022-03-01 17:51:41,278 INFO L78 Accepts]: Start accepts. Automaton has 7959 states and 34770 transitions. Word has length 33 [2022-03-01 17:51:41,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:41,278 INFO L470 AbstractCegarLoop]: Abstraction has 7959 states and 34770 transitions. [2022-03-01 17:51:41,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:41,278 INFO L276 IsEmpty]: Start isEmpty. Operand 7959 states and 34770 transitions. [2022-03-01 17:51:41,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:51:41,293 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:41,293 INFO L514 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] [2022-03-01 17:51:41,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-03-01 17:51:41,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:41,502 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:41,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:41,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1235742605, now seen corresponding path program 46 times [2022-03-01 17:51:41,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:41,503 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762120637] [2022-03-01 17:51:41,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:41,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:41,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:41,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:41,687 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:41,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762120637] [2022-03-01 17:51:41,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762120637] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:41,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664016807] [2022-03-01 17:51:41,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:51:41,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:41,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:41,688 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:41,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-01 17:51:41,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:51:41,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:41,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:51:41,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:42,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:42,092 INFO L387 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 37 treesize of output 21 [2022-03-01 17:51:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:42,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:42,507 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:51:42,508 INFO L387 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 27 treesize of output 48 [2022-03-01 17:51:42,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:42,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:42,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:42,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:42,591 INFO L387 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 27 treesize of output 7 [2022-03-01 17:51:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:42,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664016807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:42,640 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:42,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 17:51:42,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872011107] [2022-03-01 17:51:42,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:42,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:51:42,640 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:42,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:51:42,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:51:42,641 INFO L87 Difference]: Start difference. First operand 7959 states and 34770 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:44,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:44,426 INFO L93 Difference]: Finished difference Result 9194 states and 39385 transitions. [2022-03-01 17:51:44,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:51:44,426 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:51:44,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:44,451 INFO L225 Difference]: With dead ends: 9194 [2022-03-01 17:51:44,451 INFO L226 Difference]: Without dead ends: 9166 [2022-03-01 17:51:44,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=211, Invalid=2239, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 17:51:44,451 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 515 mSDsluCounter, 3073 mSDsCounter, 0 mSdLazyCounter, 4005 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 4130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 4005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:44,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 1257 Invalid, 4130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 4005 Invalid, 0 Unknown, 81 Unchecked, 1.3s Time] [2022-03-01 17:51:44,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9166 states. [2022-03-01 17:51:44,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9166 to 8022. [2022-03-01 17:51:44,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8022 states, 8021 states have (on average 4.364792419897769) internal successors, (35010), 8021 states have internal predecessors, (35010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:44,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8022 states to 8022 states and 35010 transitions. [2022-03-01 17:51:44,741 INFO L78 Accepts]: Start accepts. Automaton has 8022 states and 35010 transitions. Word has length 33 [2022-03-01 17:51:44,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:44,741 INFO L470 AbstractCegarLoop]: Abstraction has 8022 states and 35010 transitions. [2022-03-01 17:51:44,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:44,742 INFO L276 IsEmpty]: Start isEmpty. Operand 8022 states and 35010 transitions. [2022-03-01 17:51:44,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:51:44,758 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:44,758 INFO L514 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] [2022-03-01 17:51:44,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:44,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:44,973 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:44,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:44,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1432256110, now seen corresponding path program 3 times [2022-03-01 17:51:44,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:44,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046359028] [2022-03-01 17:51:44,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:44,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:45,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:45,103 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:45,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046359028] [2022-03-01 17:51:45,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046359028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:45,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38051148] [2022-03-01 17:51:45,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:51:45,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:45,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:45,104 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:45,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-01 17:51:45,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:51:45,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:45,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 17:51:45,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:45,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:45,390 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:51:45,390 INFO L387 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 33 treesize of output 57 [2022-03-01 17:51:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:45,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:45,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38051148] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:45,747 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:45,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-03-01 17:51:45,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329441849] [2022-03-01 17:51:45,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:45,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 17:51:45,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:45,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 17:51:45,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:51:45,748 INFO L87 Difference]: Start difference. First operand 8022 states and 35010 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:48,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:48,841 INFO L93 Difference]: Finished difference Result 10657 states and 44581 transitions. [2022-03-01 17:51:48,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-01 17:51:48,841 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:51:48,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:48,870 INFO L225 Difference]: With dead ends: 10657 [2022-03-01 17:51:48,870 INFO L226 Difference]: Without dead ends: 10631 [2022-03-01 17:51:48,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1745 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=672, Invalid=6638, Unknown=0, NotChecked=0, Total=7310 [2022-03-01 17:51:48,871 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 1118 mSDsluCounter, 3640 mSDsCounter, 0 mSdLazyCounter, 4572 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1118 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 4758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 4572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:48,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1118 Valid, 1422 Invalid, 4758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 4572 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-01 17:51:48,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10631 states. [2022-03-01 17:51:49,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10631 to 7990. [2022-03-01 17:51:49,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7990 states, 7989 states have (on average 4.365127049693329) internal successors, (34873), 7989 states have internal predecessors, (34873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:49,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7990 states to 7990 states and 34873 transitions. [2022-03-01 17:51:49,051 INFO L78 Accepts]: Start accepts. Automaton has 7990 states and 34873 transitions. Word has length 33 [2022-03-01 17:51:49,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:49,051 INFO L470 AbstractCegarLoop]: Abstraction has 7990 states and 34873 transitions. [2022-03-01 17:51:49,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:49,051 INFO L276 IsEmpty]: Start isEmpty. Operand 7990 states and 34873 transitions. [2022-03-01 17:51:49,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:51:49,066 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:49,066 INFO L514 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] [2022-03-01 17:51:49,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-03-01 17:51:49,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-03-01 17:51:49,281 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:49,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:49,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1876450095, now seen corresponding path program 47 times [2022-03-01 17:51:49,282 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:49,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830998436] [2022-03-01 17:51:49,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:49,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:49,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:49,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830998436] [2022-03-01 17:51:49,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830998436] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:49,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542337063] [2022-03-01 17:51:49,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:51:49,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:49,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:49,468 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:49,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-01 17:51:49,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:51:49,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:49,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:51:49,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:49,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:49,871 INFO L387 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 37 treesize of output 21 [2022-03-01 17:51:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:49,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:50,318 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:51:50,319 INFO L387 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 27 treesize of output 48 [2022-03-01 17:51:50,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:50,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:50,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:50,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:50,425 INFO L387 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 27 treesize of output 7 [2022-03-01 17:51:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:50,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542337063] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:50,465 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:50,465 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 17:51:50,465 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22477251] [2022-03-01 17:51:50,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:50,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:51:50,465 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:50,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:51:50,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:51:50,466 INFO L87 Difference]: Start difference. First operand 7990 states and 34873 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:52,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:52,824 INFO L93 Difference]: Finished difference Result 9092 states and 39166 transitions. [2022-03-01 17:51:52,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 17:51:52,824 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:51:52,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:52,849 INFO L225 Difference]: With dead ends: 9092 [2022-03-01 17:51:52,849 INFO L226 Difference]: Without dead ends: 9054 [2022-03-01 17:51:52,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=307, Invalid=2999, Unknown=0, NotChecked=0, Total=3306 [2022-03-01 17:51:52,850 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 565 mSDsluCounter, 3104 mSDsCounter, 0 mSdLazyCounter, 4065 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 4142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 4065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:52,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 1223 Invalid, 4142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 4065 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-01 17:51:52,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9054 states. [2022-03-01 17:51:52,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9054 to 8053. [2022-03-01 17:51:53,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8053 states, 8052 states have (on average 4.3691008445106805) internal successors, (35180), 8052 states have internal predecessors, (35180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:53,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8053 states to 8053 states and 35180 transitions. [2022-03-01 17:51:53,029 INFO L78 Accepts]: Start accepts. Automaton has 8053 states and 35180 transitions. Word has length 33 [2022-03-01 17:51:53,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:53,029 INFO L470 AbstractCegarLoop]: Abstraction has 8053 states and 35180 transitions. [2022-03-01 17:51:53,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:53,029 INFO L276 IsEmpty]: Start isEmpty. Operand 8053 states and 35180 transitions. [2022-03-01 17:51:53,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:51:53,045 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:53,045 INFO L514 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] [2022-03-01 17:51:53,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-03-01 17:51:53,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-03-01 17:51:53,260 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:53,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:53,260 INFO L85 PathProgramCache]: Analyzing trace with hash 745114160, now seen corresponding path program 4 times [2022-03-01 17:51:53,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:53,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727284340] [2022-03-01 17:51:53,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:53,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:53,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:53,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727284340] [2022-03-01 17:51:53,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727284340] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:53,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614345191] [2022-03-01 17:51:53,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:51:53,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:53,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:53,449 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:53,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-01 17:51:53,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:51:53,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:53,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:51:53,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:53,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:53,777 INFO L387 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 37 treesize of output 21 [2022-03-01 17:51:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:53,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:54,136 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:51:54,136 INFO L387 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 27 treesize of output 48 [2022-03-01 17:51:54,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:54,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:51:54,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:54,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:54,194 INFO L387 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 27 treesize of output 7 [2022-03-01 17:51:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:54,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614345191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:54,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:54,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 17:51:54,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577028220] [2022-03-01 17:51:54,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:54,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:51:54,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:54,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:51:54,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:51:54,234 INFO L87 Difference]: Start difference. First operand 8053 states and 35180 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:56,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:51:56,445 INFO L93 Difference]: Finished difference Result 9208 states and 39560 transitions. [2022-03-01 17:51:56,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:51:56,445 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:51:56,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:51:56,471 INFO L225 Difference]: With dead ends: 9208 [2022-03-01 17:51:56,471 INFO L226 Difference]: Without dead ends: 9160 [2022-03-01 17:51:56,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=277, Invalid=2693, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 17:51:56,471 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 616 mSDsluCounter, 3046 mSDsCounter, 0 mSdLazyCounter, 4076 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 4157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 4076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:51:56,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 1184 Invalid, 4157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 4076 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-01 17:51:56,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9160 states. [2022-03-01 17:51:56,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9160 to 7980. [2022-03-01 17:51:56,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7980 states, 7979 states have (on average 4.374232359944855) internal successors, (34902), 7979 states have internal predecessors, (34902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:56,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7980 states to 7980 states and 34902 transitions. [2022-03-01 17:51:56,641 INFO L78 Accepts]: Start accepts. Automaton has 7980 states and 34902 transitions. Word has length 33 [2022-03-01 17:51:56,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:51:56,641 INFO L470 AbstractCegarLoop]: Abstraction has 7980 states and 34902 transitions. [2022-03-01 17:51:56,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:51:56,641 INFO L276 IsEmpty]: Start isEmpty. Operand 7980 states and 34902 transitions. [2022-03-01 17:51:56,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:51:56,656 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:51:56,657 INFO L514 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] [2022-03-01 17:51:56,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-03-01 17:51:56,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:56,863 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:51:56,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:51:56,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1631151711, now seen corresponding path program 48 times [2022-03-01 17:51:56,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:51:56,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368904530] [2022-03-01 17:51:56,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:51:56,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:51:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:51:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:57,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:51:57,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368904530] [2022-03-01 17:51:57,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368904530] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:51:57,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721155501] [2022-03-01 17:51:57,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:51:57,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:51:57,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:51:57,088 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:51:57,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-01 17:51:57,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:51:57,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:51:57,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 17:51:57,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:51:57,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:51:57,421 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:51:57,422 INFO L387 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 55 [2022-03-01 17:51:57,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:57,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:51:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:51:58,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721155501] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:51:58,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:51:58,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 33 [2022-03-01 17:51:58,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833242873] [2022-03-01 17:51:58,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:51:58,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 17:51:58,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:51:58,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 17:51:58,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:51:58,020 INFO L87 Difference]: Start difference. First operand 7980 states and 34902 transitions. Second operand has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:02,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:02,132 INFO L93 Difference]: Finished difference Result 11257 states and 48216 transitions. [2022-03-01 17:52:02,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-01 17:52:02,133 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:52:02,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:02,165 INFO L225 Difference]: With dead ends: 11257 [2022-03-01 17:52:02,165 INFO L226 Difference]: Without dead ends: 11187 [2022-03-01 17:52:02,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2920 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1015, Invalid=9085, Unknown=0, NotChecked=0, Total=10100 [2022-03-01 17:52:02,166 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 1185 mSDsluCounter, 4530 mSDsCounter, 0 mSdLazyCounter, 6253 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 6493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 6253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:02,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1185 Valid, 1800 Invalid, 6493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 6253 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-01 17:52:02,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11187 states. [2022-03-01 17:52:02,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11187 to 8331. [2022-03-01 17:52:02,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8331 states, 8330 states have (on average 4.3984393757503) internal successors, (36639), 8330 states have internal predecessors, (36639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:02,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8331 states to 8331 states and 36639 transitions. [2022-03-01 17:52:02,396 INFO L78 Accepts]: Start accepts. Automaton has 8331 states and 36639 transitions. Word has length 33 [2022-03-01 17:52:02,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:02,397 INFO L470 AbstractCegarLoop]: Abstraction has 8331 states and 36639 transitions. [2022-03-01 17:52:02,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:02,397 INFO L276 IsEmpty]: Start isEmpty. Operand 8331 states and 36639 transitions. [2022-03-01 17:52:02,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:52:02,413 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:02,413 INFO L514 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] [2022-03-01 17:52:02,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:02,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-03-01 17:52:02,621 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:52:02,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:02,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1360542979, now seen corresponding path program 49 times [2022-03-01 17:52:02,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:02,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191744554] [2022-03-01 17:52:02,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:02,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:02,813 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:02,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191744554] [2022-03-01 17:52:02,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191744554] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:02,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147270226] [2022-03-01 17:52:02,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:52:02,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:02,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:02,828 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:02,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-01 17:52:02,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:02,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:52:02,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:03,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:03,060 INFO L387 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 37 treesize of output 21 [2022-03-01 17:52:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:03,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:03,336 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:52:03,337 INFO L387 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 27 treesize of output 48 [2022-03-01 17:52:03,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:03,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:03,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:03,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:03,398 INFO L387 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 27 treesize of output 7 [2022-03-01 17:52:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:03,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147270226] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:03,429 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:03,429 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 17:52:03,429 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810731940] [2022-03-01 17:52:03,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:03,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:52:03,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:03,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:52:03,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:52:03,430 INFO L87 Difference]: Start difference. First operand 8331 states and 36639 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:05,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:05,727 INFO L93 Difference]: Finished difference Result 10514 states and 45131 transitions. [2022-03-01 17:52:05,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 17:52:05,727 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:52:05,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:05,807 INFO L225 Difference]: With dead ends: 10514 [2022-03-01 17:52:05,808 INFO L226 Difference]: Without dead ends: 10463 [2022-03-01 17:52:05,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=464, Invalid=3318, Unknown=0, NotChecked=0, Total=3782 [2022-03-01 17:52:05,808 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 555 mSDsluCounter, 3606 mSDsCounter, 0 mSdLazyCounter, 4672 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 4756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 4672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:05,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [555 Valid, 1433 Invalid, 4756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 4672 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-01 17:52:05,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10463 states. [2022-03-01 17:52:05,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10463 to 8720. [2022-03-01 17:52:05,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8720 states, 8719 states have (on average 4.40910654891616) internal successors, (38443), 8719 states have internal predecessors, (38443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:06,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8720 states to 8720 states and 38443 transitions. [2022-03-01 17:52:06,014 INFO L78 Accepts]: Start accepts. Automaton has 8720 states and 38443 transitions. Word has length 33 [2022-03-01 17:52:06,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:06,014 INFO L470 AbstractCegarLoop]: Abstraction has 8720 states and 38443 transitions. [2022-03-01 17:52:06,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:06,014 INFO L276 IsEmpty]: Start isEmpty. Operand 8720 states and 38443 transitions. [2022-03-01 17:52:06,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:52:06,034 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:06,034 INFO L514 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] [2022-03-01 17:52:06,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:06,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-03-01 17:52:06,250 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:52:06,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:06,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1413929499, now seen corresponding path program 50 times [2022-03-01 17:52:06,251 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:06,251 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767444032] [2022-03-01 17:52:06,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:06,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:06,444 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:06,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767444032] [2022-03-01 17:52:06,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767444032] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:06,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492197193] [2022-03-01 17:52:06,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:52:06,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:06,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:06,446 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:06,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-03-01 17:52:06,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:52:06,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:06,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:52:06,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:06,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:06,711 INFO L387 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 33 treesize of output 49 [2022-03-01 17:52:07,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:07,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:07,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:07,495 INFO L387 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 17 treesize of output 22 [2022-03-01 17:52:07,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:07,506 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:52:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:07,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492197193] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:07,559 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:07,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-01 17:52:07,560 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481897975] [2022-03-01 17:52:07,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:07,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:52:07,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:07,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:52:07,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1065, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:52:07,560 INFO L87 Difference]: Start difference. First operand 8720 states and 38443 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:10,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:10,759 INFO L93 Difference]: Finished difference Result 10869 states and 46150 transitions. [2022-03-01 17:52:10,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-01 17:52:10,759 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:52:10,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:10,790 INFO L225 Difference]: With dead ends: 10869 [2022-03-01 17:52:10,790 INFO L226 Difference]: Without dead ends: 10839 [2022-03-01 17:52:10,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=572, Invalid=4258, Unknown=0, NotChecked=0, Total=4830 [2022-03-01 17:52:10,791 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1075 mSDsluCounter, 3202 mSDsCounter, 0 mSdLazyCounter, 3926 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 4499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 3926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 418 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:10,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1075 Valid, 1284 Invalid, 4499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 3926 Invalid, 0 Unknown, 418 Unchecked, 1.5s Time] [2022-03-01 17:52:10,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10839 states. [2022-03-01 17:52:10,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10839 to 8986. [2022-03-01 17:52:10,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8986 states, 8985 states have (on average 4.415358931552587) internal successors, (39672), 8985 states have internal predecessors, (39672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:11,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8986 states to 8986 states and 39672 transitions. [2022-03-01 17:52:11,033 INFO L78 Accepts]: Start accepts. Automaton has 8986 states and 39672 transitions. Word has length 33 [2022-03-01 17:52:11,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:11,033 INFO L470 AbstractCegarLoop]: Abstraction has 8986 states and 39672 transitions. [2022-03-01 17:52:11,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:11,033 INFO L276 IsEmpty]: Start isEmpty. Operand 8986 states and 39672 transitions. [2022-03-01 17:52:11,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:52:11,052 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:11,052 INFO L514 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] [2022-03-01 17:52:11,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:11,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-03-01 17:52:11,268 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:52:11,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:11,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1951256657, now seen corresponding path program 51 times [2022-03-01 17:52:11,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:11,269 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823642649] [2022-03-01 17:52:11,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:11,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:11,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:11,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823642649] [2022-03-01 17:52:11,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823642649] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:11,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107887174] [2022-03-01 17:52:11,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:52:11,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:11,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:11,485 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:11,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-03-01 17:52:11,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:52:11,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:11,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 17:52:11,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:11,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:11,714 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-03-01 17:52:11,714 INFO L387 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 [2022-03-01 17:52:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:11,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:12,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107887174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:12,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:12,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 34 [2022-03-01 17:52:12,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615666202] [2022-03-01 17:52:12,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:12,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:52:12,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:12,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:52:12,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:52:12,163 INFO L87 Difference]: Start difference. First operand 8986 states and 39672 transitions. Second operand has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:15,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:15,045 INFO L93 Difference]: Finished difference Result 10851 states and 46437 transitions. [2022-03-01 17:52:15,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 17:52:15,045 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:52:15,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:15,079 INFO L225 Difference]: With dead ends: 10851 [2022-03-01 17:52:15,079 INFO L226 Difference]: Without dead ends: 10821 [2022-03-01 17:52:15,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=585, Invalid=4527, Unknown=0, NotChecked=0, Total=5112 [2022-03-01 17:52:15,080 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 1094 mSDsluCounter, 3612 mSDsCounter, 0 mSdLazyCounter, 4858 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 5013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 4858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:15,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1094 Valid, 1359 Invalid, 5013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 4858 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-01 17:52:15,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10821 states. [2022-03-01 17:52:15,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10821 to 9150. [2022-03-01 17:52:15,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9150 states, 9149 states have (on average 4.4194993988414035) internal successors, (40434), 9149 states have internal predecessors, (40434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:15,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9150 states to 9150 states and 40434 transitions. [2022-03-01 17:52:15,470 INFO L78 Accepts]: Start accepts. Automaton has 9150 states and 40434 transitions. Word has length 33 [2022-03-01 17:52:15,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:15,470 INFO L470 AbstractCegarLoop]: Abstraction has 9150 states and 40434 transitions. [2022-03-01 17:52:15,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 34 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:15,470 INFO L276 IsEmpty]: Start isEmpty. Operand 9150 states and 40434 transitions. [2022-03-01 17:52:15,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:52:15,489 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:15,490 INFO L514 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] [2022-03-01 17:52:15,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:15,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:15,705 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:52:15,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:15,766 INFO L85 PathProgramCache]: Analyzing trace with hash 648899597, now seen corresponding path program 52 times [2022-03-01 17:52:15,766 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:15,766 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946247899] [2022-03-01 17:52:15,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:15,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:15,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:16,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:16,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:16,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946247899] [2022-03-01 17:52:16,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946247899] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:16,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115352035] [2022-03-01 17:52:16,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:52:16,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:16,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:16,019 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:16,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-03-01 17:52:16,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:52:16,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:16,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:52:16,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:16,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:16,359 INFO L387 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 [2022-03-01 17:52:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:16,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:16,692 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:52:16,692 INFO L387 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 27 treesize of output 48 [2022-03-01 17:52:16,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:16,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:16,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:16,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:16,749 INFO L387 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 27 treesize of output 7 [2022-03-01 17:52:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:16,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115352035] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:16,779 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:16,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 17:52:16,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489167607] [2022-03-01 17:52:16,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:16,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:52:16,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:16,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:52:16,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=965, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:52:16,780 INFO L87 Difference]: Start difference. First operand 9150 states and 40434 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:20,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:20,694 INFO L93 Difference]: Finished difference Result 11007 states and 47193 transitions. [2022-03-01 17:52:20,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-01 17:52:20,694 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:52:20,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:20,727 INFO L225 Difference]: With dead ends: 11007 [2022-03-01 17:52:20,727 INFO L226 Difference]: Without dead ends: 10992 [2022-03-01 17:52:20,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=534, Invalid=5016, Unknown=0, NotChecked=0, Total=5550 [2022-03-01 17:52:20,728 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 731 mSDsluCounter, 3602 mSDsCounter, 0 mSdLazyCounter, 4797 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 731 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 4930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 4797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:20,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [731 Valid, 1480 Invalid, 4930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 4797 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-01 17:52:20,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10992 states. [2022-03-01 17:52:20,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10992 to 9150. [2022-03-01 17:52:20,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9150 states, 9149 states have (on average 4.4194993988414035) internal successors, (40434), 9149 states have internal predecessors, (40434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:20,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9150 states to 9150 states and 40434 transitions. [2022-03-01 17:52:20,956 INFO L78 Accepts]: Start accepts. Automaton has 9150 states and 40434 transitions. Word has length 33 [2022-03-01 17:52:20,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:20,957 INFO L470 AbstractCegarLoop]: Abstraction has 9150 states and 40434 transitions. [2022-03-01 17:52:20,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:20,957 INFO L276 IsEmpty]: Start isEmpty. Operand 9150 states and 40434 transitions. [2022-03-01 17:52:20,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:52:20,974 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:20,975 INFO L514 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] [2022-03-01 17:52:20,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:21,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:21,190 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:52:21,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:21,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1561474901, now seen corresponding path program 53 times [2022-03-01 17:52:21,191 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:21,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348572042] [2022-03-01 17:52:21,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:21,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:21,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:21,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:21,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348572042] [2022-03-01 17:52:21,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348572042] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:21,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236198852] [2022-03-01 17:52:21,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:52:21,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:21,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:21,432 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:21,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-03-01 17:52:21,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:52:21,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:21,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:52:21,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:21,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:21,764 INFO L387 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 [2022-03-01 17:52:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:21,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:22,081 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:52:22,082 INFO L387 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 27 treesize of output 48 [2022-03-01 17:52:22,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:22,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:22,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:22,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:22,117 INFO L387 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 27 treesize of output 7 [2022-03-01 17:52:22,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:22,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236198852] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:22,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:22,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 17:52:22,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618673667] [2022-03-01 17:52:22,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:22,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:52:22,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:22,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:52:22,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:52:22,152 INFO L87 Difference]: Start difference. First operand 9150 states and 40434 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:25,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:25,392 INFO L93 Difference]: Finished difference Result 11316 states and 48188 transitions. [2022-03-01 17:52:25,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-01 17:52:25,393 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:52:25,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:25,425 INFO L225 Difference]: With dead ends: 11316 [2022-03-01 17:52:25,425 INFO L226 Difference]: Without dead ends: 11292 [2022-03-01 17:52:25,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=569, Invalid=4981, Unknown=0, NotChecked=0, Total=5550 [2022-03-01 17:52:25,426 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 773 mSDsluCounter, 3986 mSDsCounter, 0 mSdLazyCounter, 5379 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 1699 SdHoareTripleChecker+Invalid, 5524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 5379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:25,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 1699 Invalid, 5524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 5379 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-01 17:52:25,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11292 states. [2022-03-01 17:52:25,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11292 to 9150. [2022-03-01 17:52:25,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9150 states, 9149 states have (on average 4.4194993988414035) internal successors, (40434), 9149 states have internal predecessors, (40434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:25,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9150 states to 9150 states and 40434 transitions. [2022-03-01 17:52:25,664 INFO L78 Accepts]: Start accepts. Automaton has 9150 states and 40434 transitions. Word has length 33 [2022-03-01 17:52:25,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:25,664 INFO L470 AbstractCegarLoop]: Abstraction has 9150 states and 40434 transitions. [2022-03-01 17:52:25,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:25,664 INFO L276 IsEmpty]: Start isEmpty. Operand 9150 states and 40434 transitions. [2022-03-01 17:52:25,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:52:25,681 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:25,682 INFO L514 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] [2022-03-01 17:52:25,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:25,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:25,898 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:52:25,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:25,898 INFO L85 PathProgramCache]: Analyzing trace with hash -399872805, now seen corresponding path program 54 times [2022-03-01 17:52:25,898 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:25,898 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396924485] [2022-03-01 17:52:25,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:25,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:26,031 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:26,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396924485] [2022-03-01 17:52:26,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396924485] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:26,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275569642] [2022-03-01 17:52:26,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:52:26,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:26,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:26,033 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:26,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-03-01 17:52:26,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:52:26,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:26,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:52:26,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:26,353 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:26,354 INFO L387 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 33 treesize of output 49 [2022-03-01 17:52:27,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:27,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:27,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:27,503 INFO L387 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 17 treesize of output 22 [2022-03-01 17:52:27,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:27,510 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:52:27,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:27,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275569642] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:27,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:27,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-03-01 17:52:27,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988030666] [2022-03-01 17:52:27,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:27,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:52:27,544 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:27,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:52:27,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:52:27,544 INFO L87 Difference]: Start difference. First operand 9150 states and 40434 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:29,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:29,442 INFO L93 Difference]: Finished difference Result 10442 states and 45297 transitions. [2022-03-01 17:52:29,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 17:52:29,442 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:52:29,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:29,472 INFO L225 Difference]: With dead ends: 10442 [2022-03-01 17:52:29,472 INFO L226 Difference]: Without dead ends: 10412 [2022-03-01 17:52:29,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=485, Invalid=3547, Unknown=0, NotChecked=0, Total=4032 [2022-03-01 17:52:29,473 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 734 mSDsluCounter, 2760 mSDsCounter, 0 mSdLazyCounter, 2827 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 3604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 664 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:29,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 1066 Invalid, 3604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2827 Invalid, 0 Unknown, 664 Unchecked, 0.9s Time] [2022-03-01 17:52:29,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10412 states. [2022-03-01 17:52:29,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10412 to 9389. [2022-03-01 17:52:29,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9389 states, 9388 states have (on average 4.415636983383042) internal successors, (41454), 9388 states have internal predecessors, (41454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9389 states to 9389 states and 41454 transitions. [2022-03-01 17:52:29,720 INFO L78 Accepts]: Start accepts. Automaton has 9389 states and 41454 transitions. Word has length 33 [2022-03-01 17:52:29,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:29,720 INFO L470 AbstractCegarLoop]: Abstraction has 9389 states and 41454 transitions. [2022-03-01 17:52:29,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:29,721 INFO L276 IsEmpty]: Start isEmpty. Operand 9389 states and 41454 transitions. [2022-03-01 17:52:29,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:52:29,739 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:29,739 INFO L514 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] [2022-03-01 17:52:29,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:29,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:29,955 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:52:29,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:29,955 INFO L85 PathProgramCache]: Analyzing trace with hash 487630876, now seen corresponding path program 5 times [2022-03-01 17:52:29,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:29,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613626193] [2022-03-01 17:52:29,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:29,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:29,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:30,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:30,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613626193] [2022-03-01 17:52:30,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613626193] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:30,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521839174] [2022-03-01 17:52:30,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:52:30,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:30,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:30,156 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:30,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-03-01 17:52:30,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:52:30,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:30,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:52:30,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:30,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:30,451 INFO L387 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 37 treesize of output 21 [2022-03-01 17:52:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:30,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:30,755 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:52:30,756 INFO L387 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 27 treesize of output 48 [2022-03-01 17:52:30,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:30,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:30,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:30,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:30,799 INFO L387 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 27 treesize of output 7 [2022-03-01 17:52:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:30,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521839174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:30,830 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:30,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 17:52:30,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198374408] [2022-03-01 17:52:30,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:30,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:52:30,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:30,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:52:30,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:52:30,831 INFO L87 Difference]: Start difference. First operand 9389 states and 41454 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:33,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:33,094 INFO L93 Difference]: Finished difference Result 11328 states and 48701 transitions. [2022-03-01 17:52:33,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-01 17:52:33,095 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:52:33,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:33,128 INFO L225 Difference]: With dead ends: 11328 [2022-03-01 17:52:33,128 INFO L226 Difference]: Without dead ends: 11198 [2022-03-01 17:52:33,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=641, Invalid=4615, Unknown=0, NotChecked=0, Total=5256 [2022-03-01 17:52:33,129 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 696 mSDsluCounter, 2913 mSDsCounter, 0 mSdLazyCounter, 4054 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 4177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 4054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:33,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 1146 Invalid, 4177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 4054 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-01 17:52:33,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11198 states. [2022-03-01 17:52:33,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11198 to 9157. [2022-03-01 17:52:33,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9157 states, 9156 states have (on average 4.424639580602883) internal successors, (40512), 9156 states have internal predecessors, (40512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:33,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9157 states to 9157 states and 40512 transitions. [2022-03-01 17:52:33,429 INFO L78 Accepts]: Start accepts. Automaton has 9157 states and 40512 transitions. Word has length 33 [2022-03-01 17:52:33,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:33,429 INFO L470 AbstractCegarLoop]: Abstraction has 9157 states and 40512 transitions. [2022-03-01 17:52:33,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:33,429 INFO L276 IsEmpty]: Start isEmpty. Operand 9157 states and 40512 transitions. [2022-03-01 17:52:33,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:52:33,451 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:33,451 INFO L514 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] [2022-03-01 17:52:33,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-03-01 17:52:33,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:33,668 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:52:33,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:33,668 INFO L85 PathProgramCache]: Analyzing trace with hash 119359515, now seen corresponding path program 55 times [2022-03-01 17:52:33,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:33,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290901005] [2022-03-01 17:52:33,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:33,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:33,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:33,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290901005] [2022-03-01 17:52:33,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290901005] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:33,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193998404] [2022-03-01 17:52:33,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:52:33,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:33,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:33,890 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:33,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-03-01 17:52:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:33,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:52:33,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:34,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:34,153 INFO L387 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 37 treesize of output 21 [2022-03-01 17:52:34,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:34,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:34,502 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:52:34,503 INFO L387 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 27 treesize of output 48 [2022-03-01 17:52:34,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:34,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:34,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:34,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:34,555 INFO L387 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 27 treesize of output 7 [2022-03-01 17:52:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:34,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193998404] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:34,593 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:34,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 17:52:34,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102637140] [2022-03-01 17:52:34,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:34,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:52:34,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:34,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:52:34,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:52:34,594 INFO L87 Difference]: Start difference. First operand 9157 states and 40512 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:37,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:37,188 INFO L93 Difference]: Finished difference Result 10339 states and 45035 transitions. [2022-03-01 17:52:37,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-01 17:52:37,188 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:52:37,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:37,222 INFO L225 Difference]: With dead ends: 10339 [2022-03-01 17:52:37,222 INFO L226 Difference]: Without dead ends: 10261 [2022-03-01 17:52:37,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=473, Invalid=4497, Unknown=0, NotChecked=0, Total=4970 [2022-03-01 17:52:37,223 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 541 mSDsluCounter, 3622 mSDsCounter, 0 mSdLazyCounter, 4968 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 5063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 4968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:37,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 1396 Invalid, 5063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 4968 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-01 17:52:37,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10261 states. [2022-03-01 17:52:37,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10261 to 9142. [2022-03-01 17:52:37,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9142 states, 9141 states have (on average 4.4254457936768405) internal successors, (40453), 9141 states have internal predecessors, (40453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:37,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9142 states to 9142 states and 40453 transitions. [2022-03-01 17:52:37,428 INFO L78 Accepts]: Start accepts. Automaton has 9142 states and 40453 transitions. Word has length 33 [2022-03-01 17:52:37,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:37,428 INFO L470 AbstractCegarLoop]: Abstraction has 9142 states and 40453 transitions. [2022-03-01 17:52:37,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:37,428 INFO L276 IsEmpty]: Start isEmpty. Operand 9142 states and 40453 transitions. [2022-03-01 17:52:37,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:52:37,447 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:37,448 INFO L514 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] [2022-03-01 17:52:37,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:37,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:37,663 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:52:37,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:37,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1984743527, now seen corresponding path program 56 times [2022-03-01 17:52:37,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:37,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668951623] [2022-03-01 17:52:37,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:37,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:37,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:37,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:37,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668951623] [2022-03-01 17:52:37,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668951623] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:37,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458807770] [2022-03-01 17:52:37,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:52:37,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:37,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:37,856 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:37,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-03-01 17:52:37,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:52:37,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:37,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:52:37,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:38,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:38,346 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:52:38,346 INFO L387 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 36 treesize of output 60 [2022-03-01 17:52:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:38,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:38,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458807770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:38,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:38,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-01 17:52:38,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255971727] [2022-03-01 17:52:38,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:38,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:52:38,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:38,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:52:38,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:52:38,899 INFO L87 Difference]: Start difference. First operand 9142 states and 40453 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:42,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:42,232 INFO L93 Difference]: Finished difference Result 11651 states and 50339 transitions. [2022-03-01 17:52:42,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-01 17:52:42,233 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:52:42,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:42,265 INFO L225 Difference]: With dead ends: 11651 [2022-03-01 17:52:42,265 INFO L226 Difference]: Without dead ends: 11586 [2022-03-01 17:52:42,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=573, Invalid=5907, Unknown=0, NotChecked=0, Total=6480 [2022-03-01 17:52:42,266 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 983 mSDsluCounter, 3217 mSDsCounter, 0 mSdLazyCounter, 4125 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 4306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 4125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:42,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [983 Valid, 1302 Invalid, 4306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 4125 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-01 17:52:42,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11586 states. [2022-03-01 17:52:42,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11586 to 9220. [2022-03-01 17:52:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9220 states, 9219 states have (on average 4.428354485302093) internal successors, (40825), 9219 states have internal predecessors, (40825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:42,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9220 states to 9220 states and 40825 transitions. [2022-03-01 17:52:42,528 INFO L78 Accepts]: Start accepts. Automaton has 9220 states and 40825 transitions. Word has length 33 [2022-03-01 17:52:42,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:42,529 INFO L470 AbstractCegarLoop]: Abstraction has 9220 states and 40825 transitions. [2022-03-01 17:52:42,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:42,529 INFO L276 IsEmpty]: Start isEmpty. Operand 9220 states and 40825 transitions. [2022-03-01 17:52:42,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:52:42,547 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:42,547 INFO L514 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] [2022-03-01 17:52:42,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:42,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-03-01 17:52:42,763 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:52:42,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:42,764 INFO L85 PathProgramCache]: Analyzing trace with hash 51101753, now seen corresponding path program 57 times [2022-03-01 17:52:42,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:42,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316710129] [2022-03-01 17:52:42,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:42,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:42,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:42,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:42,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316710129] [2022-03-01 17:52:42,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316710129] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:42,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070102724] [2022-03-01 17:52:42,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:52:42,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:42,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:42,959 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:42,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-03-01 17:52:42,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:52:42,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:42,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:52:42,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:43,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:43,332 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-03-01 17:52:43,333 INFO L387 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 33 treesize of output 59 [2022-03-01 17:52:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:43,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:43,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070102724] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:43,923 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:43,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-03-01 17:52:43,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783674855] [2022-03-01 17:52:43,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:43,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:52:43,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:43,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:52:43,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:52:43,924 INFO L87 Difference]: Start difference. First operand 9220 states and 40825 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:48,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:48,045 INFO L93 Difference]: Finished difference Result 13656 states and 58400 transitions. [2022-03-01 17:52:48,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-01 17:52:48,046 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:52:48,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:48,090 INFO L225 Difference]: With dead ends: 13656 [2022-03-01 17:52:48,090 INFO L226 Difference]: Without dead ends: 13606 [2022-03-01 17:52:48,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2498 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=873, Invalid=8057, Unknown=0, NotChecked=0, Total=8930 [2022-03-01 17:52:48,091 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1391 mSDsluCounter, 4263 mSDsCounter, 0 mSdLazyCounter, 5693 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1391 SdHoareTripleChecker+Valid, 1693 SdHoareTripleChecker+Invalid, 5963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 5693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:48,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1391 Valid, 1693 Invalid, 5963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 5693 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-01 17:52:48,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13606 states. [2022-03-01 17:52:48,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13606 to 9526. [2022-03-01 17:52:48,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9526 states, 9525 states have (on average 4.4503937007874015) internal successors, (42390), 9525 states have internal predecessors, (42390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:48,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9526 states to 9526 states and 42390 transitions. [2022-03-01 17:52:48,417 INFO L78 Accepts]: Start accepts. Automaton has 9526 states and 42390 transitions. Word has length 33 [2022-03-01 17:52:48,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:48,417 INFO L470 AbstractCegarLoop]: Abstraction has 9526 states and 42390 transitions. [2022-03-01 17:52:48,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:48,417 INFO L276 IsEmpty]: Start isEmpty. Operand 9526 states and 42390 transitions. [2022-03-01 17:52:48,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:52:48,437 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:48,437 INFO L514 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] [2022-03-01 17:52:48,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:48,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-03-01 17:52:48,653 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:52:48,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:48,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1354374359, now seen corresponding path program 58 times [2022-03-01 17:52:48,654 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:48,654 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017112070] [2022-03-01 17:52:48,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:48,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:48,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:48,838 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:48,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017112070] [2022-03-01 17:52:48,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017112070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:48,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111965515] [2022-03-01 17:52:48,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:52:48,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:48,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:48,839 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:48,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-03-01 17:52:48,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:52:48,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:48,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:52:48,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:49,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:49,169 INFO L387 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 37 treesize of output 21 [2022-03-01 17:52:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:49,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:49,502 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:52:49,502 INFO L387 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 27 treesize of output 48 [2022-03-01 17:52:49,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:49,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:49,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:49,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:49,544 INFO L387 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 27 treesize of output 7 [2022-03-01 17:52:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:49,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111965515] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:49,574 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:49,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 17:52:49,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218390694] [2022-03-01 17:52:49,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:49,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:52:49,575 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:49,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:52:49,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:52:49,575 INFO L87 Difference]: Start difference. First operand 9526 states and 42390 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:51,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:51,209 INFO L93 Difference]: Finished difference Result 11176 states and 48742 transitions. [2022-03-01 17:52:51,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 17:52:51,209 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:52:51,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:51,246 INFO L225 Difference]: With dead ends: 11176 [2022-03-01 17:52:51,246 INFO L226 Difference]: Without dead ends: 11140 [2022-03-01 17:52:51,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=288, Invalid=2468, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:52:51,246 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 648 mSDsluCounter, 2376 mSDsCounter, 0 mSdLazyCounter, 3238 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 3323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 3238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:51,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 922 Invalid, 3323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 3238 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-01 17:52:51,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11140 states. [2022-03-01 17:52:51,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11140 to 9777. [2022-03-01 17:52:51,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9777 states, 9776 states have (on average 4.457037643207856) internal successors, (43572), 9776 states have internal predecessors, (43572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:51,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9777 states to 9777 states and 43572 transitions. [2022-03-01 17:52:51,505 INFO L78 Accepts]: Start accepts. Automaton has 9777 states and 43572 transitions. Word has length 33 [2022-03-01 17:52:51,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:51,505 INFO L470 AbstractCegarLoop]: Abstraction has 9777 states and 43572 transitions. [2022-03-01 17:52:51,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:51,505 INFO L276 IsEmpty]: Start isEmpty. Operand 9777 states and 43572 transitions. [2022-03-01 17:52:51,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:52:51,525 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:52:51,525 INFO L514 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] [2022-03-01 17:52:51,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-03-01 17:52:51,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-03-01 17:52:51,739 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:52:51,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:52:51,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1300987839, now seen corresponding path program 59 times [2022-03-01 17:52:51,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:52:51,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137174557] [2022-03-01 17:52:51,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:52:51,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:52:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:52:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:51,992 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:52:51,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137174557] [2022-03-01 17:52:51,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137174557] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:52:51,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650536410] [2022-03-01 17:52:51,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:52:51,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:52:51,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:52:51,993 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:52:51,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-03-01 17:52:52,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:52:52,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:52:52,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-01 17:52:52,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:52:52,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:52,339 INFO L387 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 35 treesize of output 21 [2022-03-01 17:52:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:52,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:52:52,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:52,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:52,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:52,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:52:52,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 48 [2022-03-01 17:52:52,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:52,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:52:52,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:52,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:52:52,859 INFO L387 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 27 treesize of output 7 [2022-03-01 17:52:52,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:52:52,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650536410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:52:52,934 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:52:52,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-03-01 17:52:52,935 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252370426] [2022-03-01 17:52:52,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:52:52,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:52:52,935 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:52:52,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:52:52,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:52:52,935 INFO L87 Difference]: Start difference. First operand 9777 states and 43572 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:59,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:52:59,699 INFO L93 Difference]: Finished difference Result 13528 states and 57066 transitions. [2022-03-01 17:52:59,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-01 17:52:59,699 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:52:59,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:52:59,741 INFO L225 Difference]: With dead ends: 13528 [2022-03-01 17:52:59,741 INFO L226 Difference]: Without dead ends: 13439 [2022-03-01 17:52:59,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4692 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1813, Invalid=12229, Unknown=0, NotChecked=0, Total=14042 [2022-03-01 17:52:59,743 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1737 mSDsluCounter, 4563 mSDsCounter, 0 mSdLazyCounter, 6214 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1737 SdHoareTripleChecker+Valid, 1787 SdHoareTripleChecker+Invalid, 6511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 6214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:52:59,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1737 Valid, 1787 Invalid, 6511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 6214 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-01 17:52:59,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13439 states. [2022-03-01 17:52:59,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13439 to 9963. [2022-03-01 17:52:59,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9963 states, 9962 states have (on average 4.463260389480024) internal successors, (44463), 9962 states have internal predecessors, (44463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:59,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9963 states to 9963 states and 44463 transitions. [2022-03-01 17:52:59,998 INFO L78 Accepts]: Start accepts. Automaton has 9963 states and 44463 transitions. Word has length 33 [2022-03-01 17:52:59,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:52:59,998 INFO L470 AbstractCegarLoop]: Abstraction has 9963 states and 44463 transitions. [2022-03-01 17:52:59,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:52:59,998 INFO L276 IsEmpty]: Start isEmpty. Operand 9963 states and 44463 transitions. [2022-03-01 17:53:00,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:53:00,019 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:00,019 INFO L514 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] [2022-03-01 17:53:00,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:00,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:00,235 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:00,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:00,235 INFO L85 PathProgramCache]: Analyzing trace with hash 570334073, now seen corresponding path program 60 times [2022-03-01 17:53:00,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:00,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659914434] [2022-03-01 17:53:00,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:00,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:00,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:00,423 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:00,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659914434] [2022-03-01 17:53:00,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659914434] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:00,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139375850] [2022-03-01 17:53:00,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:53:00,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:00,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:00,424 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:00,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-03-01 17:53:00,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:53:00,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:00,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:53:00,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:00,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:00,789 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-03-01 17:53:00,790 INFO L387 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 33 treesize of output 59 [2022-03-01 17:53:01,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:01,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:01,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:01,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139375850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:01,307 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:01,307 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-01 17:53:01,307 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364700433] [2022-03-01 17:53:01,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:01,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:53:01,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:01,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:53:01,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:53:01,308 INFO L87 Difference]: Start difference. First operand 9963 states and 44463 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:05,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:05,793 INFO L93 Difference]: Finished difference Result 14892 states and 64988 transitions. [2022-03-01 17:53:05,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-01 17:53:05,794 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:53:05,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:05,842 INFO L225 Difference]: With dead ends: 14892 [2022-03-01 17:53:05,842 INFO L226 Difference]: Without dead ends: 14824 [2022-03-01 17:53:05,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2423 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=804, Invalid=8126, Unknown=0, NotChecked=0, Total=8930 [2022-03-01 17:53:05,843 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 1077 mSDsluCounter, 4734 mSDsCounter, 0 mSdLazyCounter, 6071 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 1873 SdHoareTripleChecker+Invalid, 6287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 6071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:05,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1077 Valid, 1873 Invalid, 6287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 6071 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-01 17:53:05,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14824 states. [2022-03-01 17:53:06,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14824 to 11016. [2022-03-01 17:53:06,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11016 states, 11015 states have (on average 4.552156150703586) internal successors, (50142), 11015 states have internal predecessors, (50142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:06,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11016 states to 11016 states and 50142 transitions. [2022-03-01 17:53:06,129 INFO L78 Accepts]: Start accepts. Automaton has 11016 states and 50142 transitions. Word has length 33 [2022-03-01 17:53:06,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:06,129 INFO L470 AbstractCegarLoop]: Abstraction has 11016 states and 50142 transitions. [2022-03-01 17:53:06,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:06,129 INFO L276 IsEmpty]: Start isEmpty. Operand 11016 states and 50142 transitions. [2022-03-01 17:53:06,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:53:06,152 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:06,152 INFO L514 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] [2022-03-01 17:53:06,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-03-01 17:53:06,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:06,359 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:06,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:06,360 INFO L85 PathProgramCache]: Analyzing trace with hash 326417503, now seen corresponding path program 61 times [2022-03-01 17:53:06,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:06,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730222938] [2022-03-01 17:53:06,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:06,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:06,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:06,561 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:06,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730222938] [2022-03-01 17:53:06,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730222938] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:06,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491358369] [2022-03-01 17:53:06,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:53:06,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:06,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:06,576 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:06,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-03-01 17:53:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:06,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:53:06,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:06,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:06,903 INFO L387 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 37 treesize of output 21 [2022-03-01 17:53:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:06,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:07,191 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:53:07,192 INFO L387 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 27 treesize of output 48 [2022-03-01 17:53:07,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:07,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:07,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:07,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:07,234 INFO L387 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 27 treesize of output 7 [2022-03-01 17:53:07,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:07,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491358369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:07,264 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:07,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 17:53:07,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719989401] [2022-03-01 17:53:07,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:07,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:53:07,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:07,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:53:07,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:53:07,265 INFO L87 Difference]: Start difference. First operand 11016 states and 50142 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:08,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:08,990 INFO L93 Difference]: Finished difference Result 12046 states and 53910 transitions. [2022-03-01 17:53:08,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:53:08,990 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:53:08,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:09,029 INFO L225 Difference]: With dead ends: 12046 [2022-03-01 17:53:09,029 INFO L226 Difference]: Without dead ends: 11981 [2022-03-01 17:53:09,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=249, Invalid=2721, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 17:53:09,030 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 433 mSDsluCounter, 2646 mSDsCounter, 0 mSdLazyCounter, 3567 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 3606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 3567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:09,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 1070 Invalid, 3606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 3567 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-01 17:53:09,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11981 states. [2022-03-01 17:53:09,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11981 to 11016. [2022-03-01 17:53:09,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11016 states, 11015 states have (on average 4.552156150703586) internal successors, (50142), 11015 states have internal predecessors, (50142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:09,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11016 states to 11016 states and 50142 transitions. [2022-03-01 17:53:09,389 INFO L78 Accepts]: Start accepts. Automaton has 11016 states and 50142 transitions. Word has length 33 [2022-03-01 17:53:09,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:09,389 INFO L470 AbstractCegarLoop]: Abstraction has 11016 states and 50142 transitions. [2022-03-01 17:53:09,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:09,390 INFO L276 IsEmpty]: Start isEmpty. Operand 11016 states and 50142 transitions. [2022-03-01 17:53:09,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:53:09,414 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:09,414 INFO L514 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] [2022-03-01 17:53:09,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:09,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:09,627 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:09,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:09,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1256626191, now seen corresponding path program 62 times [2022-03-01 17:53:09,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:09,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801551165] [2022-03-01 17:53:09,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:09,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:09,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:09,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:09,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801551165] [2022-03-01 17:53:09,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801551165] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:09,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329865129] [2022-03-01 17:53:09,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:53:09,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:09,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:09,810 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:09,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-03-01 17:53:09,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:53:09,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:09,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:53:09,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:10,215 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:10,215 INFO L387 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 [2022-03-01 17:53:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:10,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:10,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:10,827 INFO L387 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 17 treesize of output 22 [2022-03-01 17:53:10,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:10,835 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:53:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:10,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329865129] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:10,869 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:10,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-01 17:53:10,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848965850] [2022-03-01 17:53:10,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:10,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:53:10,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:10,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:53:10,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:53:10,870 INFO L87 Difference]: Start difference. First operand 11016 states and 50142 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:12,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:12,946 INFO L93 Difference]: Finished difference Result 12337 states and 55335 transitions. [2022-03-01 17:53:12,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:53:12,946 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:53:12,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:12,986 INFO L225 Difference]: With dead ends: 12337 [2022-03-01 17:53:12,986 INFO L226 Difference]: Without dead ends: 12319 [2022-03-01 17:53:12,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=307, Invalid=2555, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 17:53:12,987 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 486 mSDsluCounter, 2486 mSDsCounter, 0 mSdLazyCounter, 3141 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 3429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 3141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:12,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 999 Invalid, 3429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 3141 Invalid, 0 Unknown, 212 Unchecked, 1.2s Time] [2022-03-01 17:53:13,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12319 states. [2022-03-01 17:53:13,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12319 to 11064. [2022-03-01 17:53:13,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11064 states, 11063 states have (on average 4.544969718882762) internal successors, (50281), 11063 states have internal predecessors, (50281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11064 states to 11064 states and 50281 transitions. [2022-03-01 17:53:13,245 INFO L78 Accepts]: Start accepts. Automaton has 11064 states and 50281 transitions. Word has length 33 [2022-03-01 17:53:13,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:13,245 INFO L470 AbstractCegarLoop]: Abstraction has 11064 states and 50281 transitions. [2022-03-01 17:53:13,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:13,245 INFO L276 IsEmpty]: Start isEmpty. Operand 11064 states and 50281 transitions. [2022-03-01 17:53:13,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:53:13,317 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:13,317 INFO L514 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] [2022-03-01 17:53:13,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:13,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2022-03-01 17:53:13,527 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:13,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:13,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1806628815, now seen corresponding path program 63 times [2022-03-01 17:53:13,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:13,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529695699] [2022-03-01 17:53:13,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:13,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:13,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:13,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:13,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529695699] [2022-03-01 17:53:13,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529695699] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:13,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876821895] [2022-03-01 17:53:13,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:53:13,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:13,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:13,696 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:13,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-03-01 17:53:13,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:53:13,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:13,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:53:13,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:13,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:13,999 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-03-01 17:53:13,999 INFO L387 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 33 treesize of output 59 [2022-03-01 17:53:14,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:14,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:14,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:14,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876821895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:14,404 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:14,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 33 [2022-03-01 17:53:14,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615015137] [2022-03-01 17:53:14,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:14,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 17:53:14,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:14,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 17:53:14,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1023, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:53:14,405 INFO L87 Difference]: Start difference. First operand 11064 states and 50281 transitions. Second operand has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:17,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:17,929 INFO L93 Difference]: Finished difference Result 13285 states and 58444 transitions. [2022-03-01 17:53:17,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-01 17:53:17,930 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:53:17,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:17,972 INFO L225 Difference]: With dead ends: 13285 [2022-03-01 17:53:17,972 INFO L226 Difference]: Without dead ends: 13211 [2022-03-01 17:53:17,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=544, Invalid=5776, Unknown=0, NotChecked=0, Total=6320 [2022-03-01 17:53:17,973 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 850 mSDsluCounter, 4043 mSDsCounter, 0 mSdLazyCounter, 5116 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 1669 SdHoareTripleChecker+Invalid, 5266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 5116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:17,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [850 Valid, 1669 Invalid, 5266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 5116 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-01 17:53:17,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13211 states. [2022-03-01 17:53:18,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13211 to 11058. [2022-03-01 17:53:18,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11058 states, 11057 states have (on average 4.553585963642941) internal successors, (50349), 11057 states have internal predecessors, (50349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:18,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11058 states to 11058 states and 50349 transitions. [2022-03-01 17:53:18,259 INFO L78 Accepts]: Start accepts. Automaton has 11058 states and 50349 transitions. Word has length 33 [2022-03-01 17:53:18,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:18,259 INFO L470 AbstractCegarLoop]: Abstraction has 11058 states and 50349 transitions. [2022-03-01 17:53:18,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:18,259 INFO L276 IsEmpty]: Start isEmpty. Operand 11058 states and 50349 transitions. [2022-03-01 17:53:18,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:53:18,282 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:18,282 INFO L514 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] [2022-03-01 17:53:18,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:18,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:18,499 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:18,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:18,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1813873799, now seen corresponding path program 64 times [2022-03-01 17:53:18,499 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:18,499 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767022082] [2022-03-01 17:53:18,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:18,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:18,687 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:18,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767022082] [2022-03-01 17:53:18,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767022082] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:18,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425584629] [2022-03-01 17:53:18,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:53:18,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:18,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:18,689 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:18,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-03-01 17:53:18,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:53:18,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:18,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:53:18,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:19,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:19,235 INFO L387 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 37 treesize of output 21 [2022-03-01 17:53:19,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:19,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:19,653 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:53:19,653 INFO L387 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 27 treesize of output 48 [2022-03-01 17:53:19,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:19,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:19,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:19,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:19,718 INFO L387 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 27 treesize of output 7 [2022-03-01 17:53:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:19,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425584629] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:19,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:19,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 17:53:19,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437181458] [2022-03-01 17:53:19,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:19,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:53:19,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:19,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:53:19,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:53:19,767 INFO L87 Difference]: Start difference. First operand 11058 states and 50349 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:21,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:21,304 INFO L93 Difference]: Finished difference Result 11637 states and 52576 transitions. [2022-03-01 17:53:21,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:53:21,304 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:53:21,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:21,341 INFO L225 Difference]: With dead ends: 11637 [2022-03-01 17:53:21,341 INFO L226 Difference]: Without dead ends: 11626 [2022-03-01 17:53:21,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=177, Invalid=1985, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 17:53:21,341 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 326 mSDsluCounter, 2090 mSDsCounter, 0 mSdLazyCounter, 2684 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 2735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:21,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 863 Invalid, 2735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2684 Invalid, 0 Unknown, 25 Unchecked, 1.0s Time] [2022-03-01 17:53:21,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11626 states. [2022-03-01 17:53:21,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11626 to 11149. [2022-03-01 17:53:21,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11149 states, 11148 states have (on average 4.540545389307499) internal successors, (50618), 11148 states have internal predecessors, (50618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:21,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11149 states to 11149 states and 50618 transitions. [2022-03-01 17:53:21,597 INFO L78 Accepts]: Start accepts. Automaton has 11149 states and 50618 transitions. Word has length 33 [2022-03-01 17:53:21,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:21,597 INFO L470 AbstractCegarLoop]: Abstraction has 11149 states and 50618 transitions. [2022-03-01 17:53:21,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:21,598 INFO L276 IsEmpty]: Start isEmpty. Operand 11149 states and 50618 transitions. [2022-03-01 17:53:21,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:53:21,620 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:21,620 INFO L514 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] [2022-03-01 17:53:21,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:21,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:21,837 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:21,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:21,837 INFO L85 PathProgramCache]: Analyzing trace with hash -926370118, now seen corresponding path program 6 times [2022-03-01 17:53:21,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:21,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467642865] [2022-03-01 17:53:21,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:21,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:22,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:22,077 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:22,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467642865] [2022-03-01 17:53:22,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467642865] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:22,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48886104] [2022-03-01 17:53:22,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:53:22,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:22,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:22,092 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:22,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-03-01 17:53:22,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:53:22,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:22,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:53:22,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:22,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:22,629 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-03-01 17:53:22,629 INFO L387 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 [2022-03-01 17:53:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:22,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:23,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48886104] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:23,066 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:23,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-03-01 17:53:23,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659218112] [2022-03-01 17:53:23,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:23,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 17:53:23,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:23,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 17:53:23,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1156, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:53:23,067 INFO L87 Difference]: Start difference. First operand 11149 states and 50618 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:27,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:27,218 INFO L93 Difference]: Finished difference Result 14471 states and 63309 transitions. [2022-03-01 17:53:27,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-01 17:53:27,218 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:53:27,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:27,260 INFO L225 Difference]: With dead ends: 14471 [2022-03-01 17:53:27,260 INFO L226 Difference]: Without dead ends: 14376 [2022-03-01 17:53:27,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2148 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=755, Invalid=8557, Unknown=0, NotChecked=0, Total=9312 [2022-03-01 17:53:27,261 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 1022 mSDsluCounter, 3921 mSDsCounter, 0 mSdLazyCounter, 5062 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 5268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 5062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:27,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 1473 Invalid, 5268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 5062 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-01 17:53:27,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14376 states. [2022-03-01 17:53:27,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14376 to 11127. [2022-03-01 17:53:27,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11127 states, 11126 states have (on average 4.554287255078195) internal successors, (50671), 11126 states have internal predecessors, (50671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:27,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11127 states to 11127 states and 50671 transitions. [2022-03-01 17:53:27,523 INFO L78 Accepts]: Start accepts. Automaton has 11127 states and 50671 transitions. Word has length 33 [2022-03-01 17:53:27,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:27,523 INFO L470 AbstractCegarLoop]: Abstraction has 11127 states and 50671 transitions. [2022-03-01 17:53:27,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:27,523 INFO L276 IsEmpty]: Start isEmpty. Operand 11127 states and 50671 transitions. [2022-03-01 17:53:27,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:53:27,544 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:27,544 INFO L514 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] [2022-03-01 17:53:27,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:27,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:27,760 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:27,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:27,760 INFO L85 PathProgramCache]: Analyzing trace with hash 446804635, now seen corresponding path program 65 times [2022-03-01 17:53:27,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:27,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469103358] [2022-03-01 17:53:27,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:27,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:27,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:27,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:27,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469103358] [2022-03-01 17:53:27,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469103358] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:27,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255326754] [2022-03-01 17:53:27,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:53:27,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:27,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:27,915 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:27,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-03-01 17:53:27,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:53:27,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:27,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:53:27,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:28,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:28,339 INFO L387 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 37 treesize of output 21 [2022-03-01 17:53:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:28,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:28,759 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:53:28,759 INFO L387 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 27 treesize of output 48 [2022-03-01 17:53:28,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:28,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:28,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:28,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:28,804 INFO L387 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 27 treesize of output 7 [2022-03-01 17:53:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:28,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255326754] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:28,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:28,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 17:53:28,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968166988] [2022-03-01 17:53:28,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:28,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:53:28,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:28,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:53:28,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:53:28,839 INFO L87 Difference]: Start difference. First operand 11127 states and 50671 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:31,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:31,004 INFO L93 Difference]: Finished difference Result 12144 states and 54457 transitions. [2022-03-01 17:53:31,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:53:31,005 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:53:31,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:31,040 INFO L225 Difference]: With dead ends: 12144 [2022-03-01 17:53:31,040 INFO L226 Difference]: Without dead ends: 12133 [2022-03-01 17:53:31,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=263, Invalid=2707, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 17:53:31,041 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 401 mSDsluCounter, 3348 mSDsCounter, 0 mSdLazyCounter, 4260 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 4551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 4260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:31,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 1373 Invalid, 4551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 4260 Invalid, 0 Unknown, 240 Unchecked, 1.5s Time] [2022-03-01 17:53:31,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12133 states. [2022-03-01 17:53:31,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12133 to 11201. [2022-03-01 17:53:31,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11201 states, 11200 states have (on average 4.5441071428571425) internal successors, (50894), 11200 states have internal predecessors, (50894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:31,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11201 states to 11201 states and 50894 transitions. [2022-03-01 17:53:31,293 INFO L78 Accepts]: Start accepts. Automaton has 11201 states and 50894 transitions. Word has length 33 [2022-03-01 17:53:31,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:31,293 INFO L470 AbstractCegarLoop]: Abstraction has 11201 states and 50894 transitions. [2022-03-01 17:53:31,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:31,293 INFO L276 IsEmpty]: Start isEmpty. Operand 11201 states and 50894 transitions. [2022-03-01 17:53:31,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:53:31,314 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:31,314 INFO L514 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] [2022-03-01 17:53:31,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:31,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:31,527 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:31,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:31,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1671487815, now seen corresponding path program 66 times [2022-03-01 17:53:31,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:31,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528069753] [2022-03-01 17:53:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:31,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:31,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:31,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528069753] [2022-03-01 17:53:31,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528069753] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:31,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517988651] [2022-03-01 17:53:31,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:53:31,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:31,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:31,728 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:31,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-03-01 17:53:31,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:53:31,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:31,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:53:31,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:32,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:32,161 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-03-01 17:53:32,161 INFO L387 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 33 treesize of output 59 [2022-03-01 17:53:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:32,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:32,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517988651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:32,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:32,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-01 17:53:32,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493383012] [2022-03-01 17:53:32,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:32,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:53:32,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:32,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:53:32,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1086, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:53:32,601 INFO L87 Difference]: Start difference. First operand 11201 states and 50894 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:36,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:36,105 INFO L93 Difference]: Finished difference Result 13953 states and 60809 transitions. [2022-03-01 17:53:36,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-01 17:53:36,106 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:53:36,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:36,152 INFO L225 Difference]: With dead ends: 13953 [2022-03-01 17:53:36,152 INFO L226 Difference]: Without dead ends: 13892 [2022-03-01 17:53:36,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=675, Invalid=7157, Unknown=0, NotChecked=0, Total=7832 [2022-03-01 17:53:36,153 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1012 mSDsluCounter, 3542 mSDsCounter, 0 mSdLazyCounter, 4531 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 4727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 4531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:36,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1012 Valid, 1388 Invalid, 4727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 4531 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-01 17:53:36,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13892 states. [2022-03-01 17:53:36,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13892 to 11145. [2022-03-01 17:53:36,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11145 states, 11144 states have (on average 4.552045944005743) internal successors, (50728), 11144 states have internal predecessors, (50728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:36,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11145 states to 11145 states and 50728 transitions. [2022-03-01 17:53:36,451 INFO L78 Accepts]: Start accepts. Automaton has 11145 states and 50728 transitions. Word has length 33 [2022-03-01 17:53:36,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:36,451 INFO L470 AbstractCegarLoop]: Abstraction has 11145 states and 50728 transitions. [2022-03-01 17:53:36,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:36,452 INFO L276 IsEmpty]: Start isEmpty. Operand 11145 states and 50728 transitions. [2022-03-01 17:53:36,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:53:36,474 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:36,474 INFO L514 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] [2022-03-01 17:53:36,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:36,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-03-01 17:53:36,679 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:36,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:36,680 INFO L85 PathProgramCache]: Analyzing trace with hash -523288529, now seen corresponding path program 67 times [2022-03-01 17:53:36,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:36,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550375640] [2022-03-01 17:53:36,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:36,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:36,901 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:36,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550375640] [2022-03-01 17:53:36,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550375640] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:36,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977225953] [2022-03-01 17:53:36,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:53:36,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:36,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:36,902 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:36,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-03-01 17:53:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:36,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:53:36,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:37,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:37,284 INFO L387 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 37 treesize of output 21 [2022-03-01 17:53:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:37,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:37,673 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:53:37,674 INFO L387 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 27 treesize of output 48 [2022-03-01 17:53:37,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:37,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:37,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:37,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:37,720 INFO L387 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 27 treesize of output 7 [2022-03-01 17:53:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:37,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977225953] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:37,756 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:37,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 17:53:37,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501565655] [2022-03-01 17:53:37,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:37,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:53:37,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:37,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:53:37,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:53:37,757 INFO L87 Difference]: Start difference. First operand 11145 states and 50728 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:39,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:39,970 INFO L93 Difference]: Finished difference Result 14490 states and 64069 transitions. [2022-03-01 17:53:39,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 17:53:39,971 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:53:39,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:40,021 INFO L225 Difference]: With dead ends: 14490 [2022-03-01 17:53:40,022 INFO L226 Difference]: Without dead ends: 14399 [2022-03-01 17:53:40,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=517, Invalid=4313, Unknown=0, NotChecked=0, Total=4830 [2022-03-01 17:53:40,022 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 701 mSDsluCounter, 3959 mSDsCounter, 0 mSdLazyCounter, 4371 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 1604 SdHoareTripleChecker+Invalid, 5277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 4371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 793 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:40,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 1604 Invalid, 5277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 4371 Invalid, 0 Unknown, 793 Unchecked, 1.4s Time] [2022-03-01 17:53:40,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14399 states. [2022-03-01 17:53:40,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14399 to 11502. [2022-03-01 17:53:40,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11502 states, 11501 states have (on average 4.563777062864099) internal successors, (52488), 11501 states have internal predecessors, (52488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:40,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11502 states to 11502 states and 52488 transitions. [2022-03-01 17:53:40,308 INFO L78 Accepts]: Start accepts. Automaton has 11502 states and 52488 transitions. Word has length 33 [2022-03-01 17:53:40,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:40,308 INFO L470 AbstractCegarLoop]: Abstraction has 11502 states and 52488 transitions. [2022-03-01 17:53:40,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:40,308 INFO L276 IsEmpty]: Start isEmpty. Operand 11502 states and 52488 transitions. [2022-03-01 17:53:40,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:53:40,331 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:40,331 INFO L514 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] [2022-03-01 17:53:40,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:40,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:40,547 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:40,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:40,547 INFO L85 PathProgramCache]: Analyzing trace with hash 779984077, now seen corresponding path program 68 times [2022-03-01 17:53:40,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:40,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907597929] [2022-03-01 17:53:40,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:40,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:40,720 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:40,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907597929] [2022-03-01 17:53:40,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907597929] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:40,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666235749] [2022-03-01 17:53:40,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:53:40,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:40,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:40,721 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:40,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-03-01 17:53:40,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:53:40,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:40,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:53:40,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:41,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:41,024 INFO L387 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 [2022-03-01 17:53:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:41,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:41,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:53:41,724 INFO L387 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 17 treesize of output 22 [2022-03-01 17:53:41,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:41,735 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:53:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:41,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666235749] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:41,787 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:41,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 28 [2022-03-01 17:53:41,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391945508] [2022-03-01 17:53:41,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:41,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 17:53:41,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:41,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 17:53:41,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:53:41,788 INFO L87 Difference]: Start difference. First operand 11502 states and 52488 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:43,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:43,165 INFO L93 Difference]: Finished difference Result 12534 states and 56539 transitions. [2022-03-01 17:53:43,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:53:43,165 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:53:43,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:43,208 INFO L225 Difference]: With dead ends: 12534 [2022-03-01 17:53:43,208 INFO L226 Difference]: Without dead ends: 12523 [2022-03-01 17:53:43,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=262, Invalid=1808, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:53:43,209 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 519 mSDsluCounter, 2570 mSDsCounter, 0 mSdLazyCounter, 2807 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 1068 SdHoareTripleChecker+Invalid, 3565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 698 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:43,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 1068 Invalid, 3565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2807 Invalid, 0 Unknown, 698 Unchecked, 0.9s Time] [2022-03-01 17:53:43,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12523 states. [2022-03-01 17:53:43,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12523 to 11538. [2022-03-01 17:53:43,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11538 states, 11537 states have (on average 4.5602843026783395) internal successors, (52612), 11537 states have internal predecessors, (52612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:43,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11538 states to 11538 states and 52612 transitions. [2022-03-01 17:53:43,558 INFO L78 Accepts]: Start accepts. Automaton has 11538 states and 52612 transitions. Word has length 33 [2022-03-01 17:53:43,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:43,558 INFO L470 AbstractCegarLoop]: Abstraction has 11538 states and 52612 transitions. [2022-03-01 17:53:43,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:43,558 INFO L276 IsEmpty]: Start isEmpty. Operand 11538 states and 52612 transitions. [2022-03-01 17:53:43,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:53:43,582 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:43,582 INFO L514 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] [2022-03-01 17:53:43,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-03-01 17:53:43,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-03-01 17:53:43,795 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:43,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:43,796 INFO L85 PathProgramCache]: Analyzing trace with hash 583470572, now seen corresponding path program 7 times [2022-03-01 17:53:43,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:43,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123870230] [2022-03-01 17:53:43,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:43,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:43,907 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:43,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:43,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123870230] [2022-03-01 17:53:43,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123870230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:43,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253761167] [2022-03-01 17:53:43,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:53:43,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:43,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:43,909 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:43,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-03-01 17:53:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:43,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:53:43,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:44,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:44,194 INFO L387 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 [2022-03-01 17:53:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:44,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:44,514 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:53:44,515 INFO L387 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 27 treesize of output 48 [2022-03-01 17:53:44,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:44,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:44,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:44,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:44,568 INFO L387 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 27 treesize of output 7 [2022-03-01 17:53:44,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:44,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253761167] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:44,608 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:44,608 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-03-01 17:53:44,608 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289392349] [2022-03-01 17:53:44,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:44,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:53:44,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:44,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:53:44,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:53:44,609 INFO L87 Difference]: Start difference. First operand 11538 states and 52612 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:47,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:47,010 INFO L93 Difference]: Finished difference Result 14425 states and 63648 transitions. [2022-03-01 17:53:47,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-01 17:53:47,010 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:53:47,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:47,056 INFO L225 Difference]: With dead ends: 14425 [2022-03-01 17:53:47,056 INFO L226 Difference]: Without dead ends: 14274 [2022-03-01 17:53:47,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=450, Invalid=3582, Unknown=0, NotChecked=0, Total=4032 [2022-03-01 17:53:47,057 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 756 mSDsluCounter, 3232 mSDsCounter, 0 mSdLazyCounter, 4186 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 4285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 4186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:47,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 1349 Invalid, 4285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 4186 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-01 17:53:47,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14274 states. [2022-03-01 17:53:47,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14274 to 11508. [2022-03-01 17:53:47,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11508 states, 11507 states have (on average 4.561745024767533) internal successors, (52492), 11507 states have internal predecessors, (52492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:47,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11508 states to 11508 states and 52492 transitions. [2022-03-01 17:53:47,350 INFO L78 Accepts]: Start accepts. Automaton has 11508 states and 52492 transitions. Word has length 33 [2022-03-01 17:53:47,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:47,350 INFO L470 AbstractCegarLoop]: Abstraction has 11508 states and 52492 transitions. [2022-03-01 17:53:47,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:47,350 INFO L276 IsEmpty]: Start isEmpty. Operand 11508 states and 52492 transitions. [2022-03-01 17:53:47,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:53:47,373 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:47,373 INFO L514 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] [2022-03-01 17:53:47,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-03-01 17:53:47,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-03-01 17:53:47,589 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:47,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:47,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1505540643, now seen corresponding path program 69 times [2022-03-01 17:53:47,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:47,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23426852] [2022-03-01 17:53:47,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:47,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:47,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:47,751 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:47,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23426852] [2022-03-01 17:53:47,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23426852] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:47,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236442302] [2022-03-01 17:53:47,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:53:47,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:47,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:47,753 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:47,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-03-01 17:53:47,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:53:47,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:47,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 17:53:47,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:48,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:48,116 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:53:48,117 INFO L387 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 55 [2022-03-01 17:53:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:48,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:48,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236442302] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:48,577 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:48,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-03-01 17:53:48,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751147791] [2022-03-01 17:53:48,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:48,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:53:48,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:48,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:53:48,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:53:48,578 INFO L87 Difference]: Start difference. First operand 11508 states and 52492 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:53,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:53,079 INFO L93 Difference]: Finished difference Result 15526 states and 68442 transitions. [2022-03-01 17:53:53,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-01 17:53:53,080 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:53:53,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:53,131 INFO L225 Difference]: With dead ends: 15526 [2022-03-01 17:53:53,131 INFO L226 Difference]: Without dead ends: 15462 [2022-03-01 17:53:53,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2848 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=809, Invalid=9091, Unknown=0, NotChecked=0, Total=9900 [2022-03-01 17:53:53,132 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1141 mSDsluCounter, 5019 mSDsCounter, 0 mSdLazyCounter, 6419 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1141 SdHoareTripleChecker+Valid, 2129 SdHoareTripleChecker+Invalid, 6647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 6419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:53,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1141 Valid, 2129 Invalid, 6647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 6419 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-01 17:53:53,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15462 states. [2022-03-01 17:53:53,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15462 to 11922. [2022-03-01 17:53:53,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11922 states, 11921 states have (on average 4.589212314403154) internal successors, (54708), 11921 states have internal predecessors, (54708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:53,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11922 states to 11922 states and 54708 transitions. [2022-03-01 17:53:53,535 INFO L78 Accepts]: Start accepts. Automaton has 11922 states and 54708 transitions. Word has length 33 [2022-03-01 17:53:53,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:53,535 INFO L470 AbstractCegarLoop]: Abstraction has 11922 states and 54708 transitions. [2022-03-01 17:53:53,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:53,535 INFO L276 IsEmpty]: Start isEmpty. Operand 11922 states and 54708 transitions. [2022-03-01 17:53:53,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:53:53,559 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:53,559 INFO L514 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] [2022-03-01 17:53:53,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-03-01 17:53:53,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:53,775 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:53,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:53,776 INFO L85 PathProgramCache]: Analyzing trace with hash 569915123, now seen corresponding path program 70 times [2022-03-01 17:53:53,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:53,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304207063] [2022-03-01 17:53:53,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:53,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:53,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:53,952 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:53,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304207063] [2022-03-01 17:53:53,952 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304207063] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:53,952 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171375863] [2022-03-01 17:53:53,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:53:53,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:53,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:53,954 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:53,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-03-01 17:53:53,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:53:53,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:53,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:53:53,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:54,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:54,402 INFO L387 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 [2022-03-01 17:53:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:54,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:54,761 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:53:54,761 INFO L387 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 27 treesize of output 48 [2022-03-01 17:53:54,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:54,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:54,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:54,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:54,804 INFO L387 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 27 treesize of output 7 [2022-03-01 17:53:54,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:54,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171375863] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:54,835 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:54,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 17:53:54,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477557696] [2022-03-01 17:53:54,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:54,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:53:54,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:54,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:53:54,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:53:54,835 INFO L87 Difference]: Start difference. First operand 11922 states and 54708 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:57,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:53:57,141 INFO L93 Difference]: Finished difference Result 13028 states and 59162 transitions. [2022-03-01 17:53:57,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-01 17:53:57,141 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:53:57,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:53:57,184 INFO L225 Difference]: With dead ends: 13028 [2022-03-01 17:53:57,184 INFO L226 Difference]: Without dead ends: 12998 [2022-03-01 17:53:57,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=375, Invalid=4047, Unknown=0, NotChecked=0, Total=4422 [2022-03-01 17:53:57,185 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 484 mSDsluCounter, 3200 mSDsCounter, 0 mSdLazyCounter, 4281 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 4348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 4281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:53:57,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 1356 Invalid, 4348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 4281 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-01 17:53:57,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12998 states. [2022-03-01 17:53:57,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12998 to 11924. [2022-03-01 17:53:57,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11924 states, 11923 states have (on average 4.589197349660321) internal successors, (54717), 11923 states have internal predecessors, (54717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:57,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11924 states to 11924 states and 54717 transitions. [2022-03-01 17:53:57,462 INFO L78 Accepts]: Start accepts. Automaton has 11924 states and 54717 transitions. Word has length 33 [2022-03-01 17:53:57,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:53:57,462 INFO L470 AbstractCegarLoop]: Abstraction has 11924 states and 54717 transitions. [2022-03-01 17:53:57,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:53:57,462 INFO L276 IsEmpty]: Start isEmpty. Operand 11924 states and 54717 transitions. [2022-03-01 17:53:57,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:53:57,486 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:53:57,486 INFO L514 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] [2022-03-01 17:53:57,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-03-01 17:53:57,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2022-03-01 17:53:57,702 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:53:57,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:53:57,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1003944469, now seen corresponding path program 71 times [2022-03-01 17:53:57,702 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:53:57,702 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832281533] [2022-03-01 17:53:57,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:53:57,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:53:57,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:53:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:57,832 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:53:57,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832281533] [2022-03-01 17:53:57,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832281533] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:53:57,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38749384] [2022-03-01 17:53:57,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:53:57,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:53:57,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:53:57,833 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:53:57,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-03-01 17:53:57,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:53:57,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:53:57,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:53:57,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:53:58,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:58,212 INFO L387 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 37 treesize of output 21 [2022-03-01 17:53:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:58,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:53:58,618 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:53:58,618 INFO L387 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 27 treesize of output 48 [2022-03-01 17:53:58,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:58,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:53:58,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:58,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:53:58,667 INFO L387 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 27 treesize of output 7 [2022-03-01 17:53:58,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:53:58,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38749384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:53:58,715 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:53:58,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 17:53:58,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480937404] [2022-03-01 17:53:58,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:53:58,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:53:58,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:53:58,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:53:58,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:53:58,715 INFO L87 Difference]: Start difference. First operand 11924 states and 54717 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:02,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:02,074 INFO L93 Difference]: Finished difference Result 14210 states and 63649 transitions. [2022-03-01 17:54:02,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-01 17:54:02,075 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:54:02,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:02,119 INFO L225 Difference]: With dead ends: 14210 [2022-03-01 17:54:02,119 INFO L226 Difference]: Without dead ends: 14151 [2022-03-01 17:54:02,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=431, Invalid=4681, Unknown=0, NotChecked=0, Total=5112 [2022-03-01 17:54:02,120 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 595 mSDsluCounter, 4139 mSDsCounter, 0 mSdLazyCounter, 5535 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 5619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 5535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:02,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [595 Valid, 1726 Invalid, 5619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 5535 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-01 17:54:02,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14151 states. [2022-03-01 17:54:02,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14151 to 11925. [2022-03-01 17:54:02,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11925 states, 11924 states have (on average 4.589483394833948) internal successors, (54725), 11924 states have internal predecessors, (54725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:02,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11925 states to 11925 states and 54725 transitions. [2022-03-01 17:54:02,411 INFO L78 Accepts]: Start accepts. Automaton has 11925 states and 54725 transitions. Word has length 33 [2022-03-01 17:54:02,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:02,411 INFO L470 AbstractCegarLoop]: Abstraction has 11925 states and 54725 transitions. [2022-03-01 17:54:02,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:02,411 INFO L276 IsEmpty]: Start isEmpty. Operand 11925 states and 54725 transitions. [2022-03-01 17:54:02,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:54:02,437 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:02,437 INFO L514 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] [2022-03-01 17:54:02,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:02,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:02,644 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:02,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:02,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1425999091, now seen corresponding path program 72 times [2022-03-01 17:54:02,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:02,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688152132] [2022-03-01 17:54:02,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:02,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:02,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:02,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688152132] [2022-03-01 17:54:02,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688152132] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:02,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507699328] [2022-03-01 17:54:02,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:54:02,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:02,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:02,854 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:02,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-03-01 17:54:02,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:54:02,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:02,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:54:02,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:03,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:03,178 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:54:03,178 INFO L387 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 55 [2022-03-01 17:54:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:03,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:03,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507699328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:03,640 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:03,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-03-01 17:54:03,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145005774] [2022-03-01 17:54:03,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:03,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:54:03,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:03,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:54:03,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:54:03,641 INFO L87 Difference]: Start difference. First operand 11925 states and 54725 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:06,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:06,891 INFO L93 Difference]: Finished difference Result 15371 states and 68303 transitions. [2022-03-01 17:54:06,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-01 17:54:06,891 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:54:06,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:06,946 INFO L225 Difference]: With dead ends: 15371 [2022-03-01 17:54:06,946 INFO L226 Difference]: Without dead ends: 15301 [2022-03-01 17:54:06,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2150 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=827, Invalid=6829, Unknown=0, NotChecked=0, Total=7656 [2022-03-01 17:54:06,947 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1188 mSDsluCounter, 3777 mSDsCounter, 0 mSdLazyCounter, 4986 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1188 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 5235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 4986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:06,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1188 Valid, 1531 Invalid, 5235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 4986 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-01 17:54:06,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15301 states. [2022-03-01 17:54:07,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15301 to 12325. [2022-03-01 17:54:07,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12325 states, 12324 states have (on average 4.600048685491723) internal successors, (56691), 12324 states have internal predecessors, (56691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:07,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12325 states to 12325 states and 56691 transitions. [2022-03-01 17:54:07,300 INFO L78 Accepts]: Start accepts. Automaton has 12325 states and 56691 transitions. Word has length 33 [2022-03-01 17:54:07,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:07,300 INFO L470 AbstractCegarLoop]: Abstraction has 12325 states and 56691 transitions. [2022-03-01 17:54:07,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:07,300 INFO L276 IsEmpty]: Start isEmpty. Operand 12325 states and 56691 transitions. [2022-03-01 17:54:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:54:07,329 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:07,329 INFO L514 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] [2022-03-01 17:54:07,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-03-01 17:54:07,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:07,543 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:07,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:07,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1565695599, now seen corresponding path program 73 times [2022-03-01 17:54:07,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:07,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397329612] [2022-03-01 17:54:07,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:07,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:07,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:07,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397329612] [2022-03-01 17:54:07,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397329612] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:07,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113106700] [2022-03-01 17:54:07,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:54:07,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:07,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:07,667 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:07,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-03-01 17:54:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:07,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:54:07,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:07,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:07,887 INFO L387 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 37 treesize of output 21 [2022-03-01 17:54:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:07,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:08,163 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:54:08,163 INFO L387 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 27 treesize of output 48 [2022-03-01 17:54:08,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:08,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:08,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:08,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:08,205 INFO L387 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 27 treesize of output 7 [2022-03-01 17:54:08,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:08,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113106700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:08,291 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:08,291 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-03-01 17:54:08,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952310897] [2022-03-01 17:54:08,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:08,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:54:08,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:08,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:54:08,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:54:08,292 INFO L87 Difference]: Start difference. First operand 12325 states and 56691 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:09,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:09,905 INFO L93 Difference]: Finished difference Result 15305 states and 68662 transitions. [2022-03-01 17:54:09,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-01 17:54:09,906 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:54:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:09,960 INFO L225 Difference]: With dead ends: 15305 [2022-03-01 17:54:09,960 INFO L226 Difference]: Without dead ends: 15253 [2022-03-01 17:54:09,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=547, Invalid=3743, Unknown=0, NotChecked=0, Total=4290 [2022-03-01 17:54:09,961 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 759 mSDsluCounter, 2512 mSDsCounter, 0 mSdLazyCounter, 2860 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 3492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 499 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:09,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [759 Valid, 994 Invalid, 3492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2860 Invalid, 0 Unknown, 499 Unchecked, 0.9s Time] [2022-03-01 17:54:10,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15253 states. [2022-03-01 17:54:10,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15253 to 12871. [2022-03-01 17:54:10,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12871 states, 12870 states have (on average 4.6015540015540015) internal successors, (59222), 12870 states have internal predecessors, (59222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:10,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12871 states to 12871 states and 59222 transitions. [2022-03-01 17:54:10,369 INFO L78 Accepts]: Start accepts. Automaton has 12871 states and 59222 transitions. Word has length 33 [2022-03-01 17:54:10,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:10,369 INFO L470 AbstractCegarLoop]: Abstraction has 12871 states and 59222 transitions. [2022-03-01 17:54:10,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:10,369 INFO L276 IsEmpty]: Start isEmpty. Operand 12871 states and 59222 transitions. [2022-03-01 17:54:10,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:54:10,398 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:10,398 INFO L514 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] [2022-03-01 17:54:10,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:10,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:10,613 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:10,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:10,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1619082119, now seen corresponding path program 74 times [2022-03-01 17:54:10,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:10,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686654389] [2022-03-01 17:54:10,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:10,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:10,826 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:10,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686654389] [2022-03-01 17:54:10,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686654389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:10,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115012487] [2022-03-01 17:54:10,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:54:10,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:10,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:10,828 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:10,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-03-01 17:54:10,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:54:10,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:10,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:54:10,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:11,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:11,072 INFO L387 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 33 treesize of output 49 [2022-03-01 17:54:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:11,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:11,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:11,677 INFO L387 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 17 treesize of output 22 [2022-03-01 17:54:11,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:11,684 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:54:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:11,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115012487] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:11,716 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:11,716 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 29 [2022-03-01 17:54:11,716 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107638712] [2022-03-01 17:54:11,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:11,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:54:11,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:11,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:54:11,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:54:11,716 INFO L87 Difference]: Start difference. First operand 12871 states and 59222 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:13,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:13,110 INFO L93 Difference]: Finished difference Result 13881 states and 63291 transitions. [2022-03-01 17:54:13,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:54:13,110 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:54:13,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:13,161 INFO L225 Difference]: With dead ends: 13881 [2022-03-01 17:54:13,162 INFO L226 Difference]: Without dead ends: 13860 [2022-03-01 17:54:13,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=372, Invalid=2280, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 17:54:13,162 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 614 mSDsluCounter, 2066 mSDsCounter, 0 mSdLazyCounter, 2222 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 2927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 608 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:13,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 808 Invalid, 2927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2222 Invalid, 0 Unknown, 608 Unchecked, 0.7s Time] [2022-03-01 17:54:13,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13860 states. [2022-03-01 17:54:13,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13860 to 12916. [2022-03-01 17:54:13,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12916 states, 12915 states have (on average 4.598915989159892) internal successors, (59395), 12915 states have internal predecessors, (59395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:13,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12916 states to 12916 states and 59395 transitions. [2022-03-01 17:54:13,495 INFO L78 Accepts]: Start accepts. Automaton has 12916 states and 59395 transitions. Word has length 33 [2022-03-01 17:54:13,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:13,495 INFO L470 AbstractCegarLoop]: Abstraction has 12916 states and 59395 transitions. [2022-03-01 17:54:13,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:13,495 INFO L276 IsEmpty]: Start isEmpty. Operand 12916 states and 59395 transitions. [2022-03-01 17:54:13,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:54:13,528 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:13,528 INFO L514 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] [2022-03-01 17:54:13,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:13,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2022-03-01 17:54:13,731 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:13,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:13,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1912485126, now seen corresponding path program 1 times [2022-03-01 17:54:13,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:13,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005299161] [2022-03-01 17:54:13,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:13,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:13,933 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:13,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005299161] [2022-03-01 17:54:13,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005299161] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:13,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671788700] [2022-03-01 17:54:13,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:13,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:13,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:13,935 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:13,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-03-01 17:54:13,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:13,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:54:13,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:14,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:14,256 INFO L387 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 37 treesize of output 21 [2022-03-01 17:54:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:14,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:14,660 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:54:14,661 INFO L387 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 27 treesize of output 48 [2022-03-01 17:54:14,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:14,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:14,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:14,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:14,727 INFO L387 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 27 treesize of output 7 [2022-03-01 17:54:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:14,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671788700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:14,777 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:14,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-03-01 17:54:14,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189821207] [2022-03-01 17:54:14,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:14,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:54:14,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:14,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:54:14,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:54:14,778 INFO L87 Difference]: Start difference. First operand 12916 states and 59395 transitions. Second operand has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 30 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:17,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:17,182 INFO L93 Difference]: Finished difference Result 15368 states and 68891 transitions. [2022-03-01 17:54:17,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-01 17:54:17,183 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 30 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:54:17,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:17,229 INFO L225 Difference]: With dead ends: 15368 [2022-03-01 17:54:17,229 INFO L226 Difference]: Without dead ends: 15311 [2022-03-01 17:54:17,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=544, Invalid=3616, Unknown=0, NotChecked=0, Total=4160 [2022-03-01 17:54:17,230 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 615 mSDsluCounter, 3027 mSDsCounter, 0 mSdLazyCounter, 3292 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 3991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 575 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:17,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 1215 Invalid, 3991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 3292 Invalid, 0 Unknown, 575 Unchecked, 1.4s Time] [2022-03-01 17:54:17,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15311 states. [2022-03-01 17:54:17,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15311 to 12960. [2022-03-01 17:54:17,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12960 states, 12959 states have (on average 4.5935643182344315) internal successors, (59528), 12959 states have internal predecessors, (59528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:17,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12960 states to 12960 states and 59528 transitions. [2022-03-01 17:54:17,610 INFO L78 Accepts]: Start accepts. Automaton has 12960 states and 59528 transitions. Word has length 33 [2022-03-01 17:54:17,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:17,610 INFO L470 AbstractCegarLoop]: Abstraction has 12960 states and 59528 transitions. [2022-03-01 17:54:17,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 30 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:17,610 INFO L276 IsEmpty]: Start isEmpty. Operand 12960 states and 59528 transitions. [2022-03-01 17:54:17,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:54:17,637 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:17,638 INFO L514 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] [2022-03-01 17:54:17,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-03-01 17:54:17,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:17,853 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:17,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:17,854 INFO L85 PathProgramCache]: Analyzing trace with hash 501733676, now seen corresponding path program 8 times [2022-03-01 17:54:17,854 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:17,854 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945409717] [2022-03-01 17:54:17,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:17,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:17,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:18,037 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:18,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945409717] [2022-03-01 17:54:18,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945409717] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:18,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798484548] [2022-03-01 17:54:18,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:54:18,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:18,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:18,038 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:18,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-03-01 17:54:18,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:54:18,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:18,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:54:18,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:18,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:18,332 INFO L387 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 33 treesize of output 49 [2022-03-01 17:54:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:18,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:19,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:19,137 INFO L387 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 17 treesize of output 22 [2022-03-01 17:54:19,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:19,147 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:54:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:19,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798484548] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:19,195 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:19,195 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 29 [2022-03-01 17:54:19,195 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819901281] [2022-03-01 17:54:19,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:19,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:54:19,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:19,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:54:19,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:54:19,196 INFO L87 Difference]: Start difference. First operand 12960 states and 59528 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:21,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:21,016 INFO L93 Difference]: Finished difference Result 14238 states and 64285 transitions. [2022-03-01 17:54:21,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 17:54:21,017 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:54:21,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:21,062 INFO L225 Difference]: With dead ends: 14238 [2022-03-01 17:54:21,062 INFO L226 Difference]: Without dead ends: 14219 [2022-03-01 17:54:21,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=402, Invalid=2568, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 17:54:21,063 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 739 mSDsluCounter, 2466 mSDsCounter, 0 mSdLazyCounter, 2646 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 3332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 586 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:21,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 940 Invalid, 3332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2646 Invalid, 0 Unknown, 586 Unchecked, 1.0s Time] [2022-03-01 17:54:21,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14219 states. [2022-03-01 17:54:21,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14219 to 12999. [2022-03-01 17:54:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12999 states, 12998 states have (on average 4.589936913371288) internal successors, (59660), 12998 states have internal predecessors, (59660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:21,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12999 states to 12999 states and 59660 transitions. [2022-03-01 17:54:21,474 INFO L78 Accepts]: Start accepts. Automaton has 12999 states and 59660 transitions. Word has length 33 [2022-03-01 17:54:21,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:21,474 INFO L470 AbstractCegarLoop]: Abstraction has 12999 states and 59660 transitions. [2022-03-01 17:54:21,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:21,474 INFO L276 IsEmpty]: Start isEmpty. Operand 12999 states and 59660 transitions. [2022-03-01 17:54:21,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:54:21,505 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:21,505 INFO L514 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] [2022-03-01 17:54:21,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:21,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:21,719 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:21,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:21,720 INFO L85 PathProgramCache]: Analyzing trace with hash 644860661, now seen corresponding path program 75 times [2022-03-01 17:54:21,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:21,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712648618] [2022-03-01 17:54:21,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:21,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:21,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:21,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:21,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712648618] [2022-03-01 17:54:21,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712648618] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:21,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514317790] [2022-03-01 17:54:21,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:54:21,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:21,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:21,906 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:21,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-03-01 17:54:21,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:54:21,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:21,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:54:21,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:22,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:22,223 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-03-01 17:54:22,223 INFO L387 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 [2022-03-01 17:54:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:22,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:22,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:54:22,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514317790] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:22,749 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:22,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 11] total 29 [2022-03-01 17:54:22,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306454243] [2022-03-01 17:54:22,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:22,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:54:22,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:22,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:54:22,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:54:22,750 INFO L87 Difference]: Start difference. First operand 12999 states and 59660 transitions. Second operand has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:26,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:26,382 INFO L93 Difference]: Finished difference Result 15716 states and 70456 transitions. [2022-03-01 17:54:26,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-01 17:54:26,382 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:54:26,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:26,431 INFO L225 Difference]: With dead ends: 15716 [2022-03-01 17:54:26,432 INFO L226 Difference]: Without dead ends: 15684 [2022-03-01 17:54:26,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=717, Invalid=5289, Unknown=0, NotChecked=0, Total=6006 [2022-03-01 17:54:26,433 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 895 mSDsluCounter, 3552 mSDsCounter, 0 mSdLazyCounter, 4844 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 5031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 4844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:26,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [895 Valid, 1482 Invalid, 5031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 4844 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-01 17:54:26,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15684 states. [2022-03-01 17:54:26,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15684 to 13483. [2022-03-01 17:54:26,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13483 states, 13482 states have (on average 4.60354546803145) internal successors, (62065), 13482 states have internal predecessors, (62065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:26,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13483 states to 13483 states and 62065 transitions. [2022-03-01 17:54:26,828 INFO L78 Accepts]: Start accepts. Automaton has 13483 states and 62065 transitions. Word has length 33 [2022-03-01 17:54:26,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:26,828 INFO L470 AbstractCegarLoop]: Abstraction has 13483 states and 62065 transitions. [2022-03-01 17:54:26,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:26,828 INFO L276 IsEmpty]: Start isEmpty. Operand 13483 states and 62065 transitions. [2022-03-01 17:54:26,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:54:26,858 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:26,859 INFO L514 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] [2022-03-01 17:54:26,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-03-01 17:54:27,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-03-01 17:54:27,074 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:27,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:27,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1998066250, now seen corresponding path program 9 times [2022-03-01 17:54:27,074 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:27,074 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624212718] [2022-03-01 17:54:27,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:27,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:27,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:27,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:27,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624212718] [2022-03-01 17:54:27,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624212718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:27,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688729056] [2022-03-01 17:54:27,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:54:27,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:27,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:27,295 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:27,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-03-01 17:54:27,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:54:27,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:27,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:54:27,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:27,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:27,627 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:54:27,628 INFO L387 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 55 [2022-03-01 17:54:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:27,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:54:28,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688729056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:28,121 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:28,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 30 [2022-03-01 17:54:28,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015922350] [2022-03-01 17:54:28,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:28,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:54:28,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:28,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:54:28,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:54:28,122 INFO L87 Difference]: Start difference. First operand 13483 states and 62065 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:31,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:31,335 INFO L93 Difference]: Finished difference Result 15794 states and 70966 transitions. [2022-03-01 17:54:31,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-01 17:54:31,335 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:54:31,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:31,386 INFO L225 Difference]: With dead ends: 15794 [2022-03-01 17:54:31,386 INFO L226 Difference]: Without dead ends: 15717 [2022-03-01 17:54:31,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1911 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=738, Invalid=6068, Unknown=0, NotChecked=0, Total=6806 [2022-03-01 17:54:31,387 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 996 mSDsluCounter, 3484 mSDsCounter, 0 mSdLazyCounter, 4654 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 4888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 4654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:31,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [996 Valid, 1439 Invalid, 4888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 4654 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-01 17:54:31,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15717 states. [2022-03-01 17:54:31,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15717 to 13475. [2022-03-01 17:54:31,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13475 states, 13474 states have (on average 4.60397803176488) internal successors, (62034), 13474 states have internal predecessors, (62034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:31,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13475 states to 13475 states and 62034 transitions. [2022-03-01 17:54:31,774 INFO L78 Accepts]: Start accepts. Automaton has 13475 states and 62034 transitions. Word has length 33 [2022-03-01 17:54:31,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:31,774 INFO L470 AbstractCegarLoop]: Abstraction has 13475 states and 62034 transitions. [2022-03-01 17:54:31,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:31,774 INFO L276 IsEmpty]: Start isEmpty. Operand 13475 states and 62034 transitions. [2022-03-01 17:54:31,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:54:31,803 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:31,803 INFO L514 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] [2022-03-01 17:54:31,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:32,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-03-01 17:54:32,019 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:32,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:32,019 INFO L85 PathProgramCache]: Analyzing trace with hash 404844174, now seen corresponding path program 2 times [2022-03-01 17:54:32,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:32,019 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960365855] [2022-03-01 17:54:32,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:32,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:32,194 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:32,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960365855] [2022-03-01 17:54:32,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960365855] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:32,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897556637] [2022-03-01 17:54:32,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:54:32,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:32,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:32,196 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:32,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-03-01 17:54:32,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:54:32,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:32,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:54:32,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:32,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:32,492 INFO L387 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 33 treesize of output 49 [2022-03-01 17:54:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:33,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:33,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:33,302 INFO L387 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 17 treesize of output 22 [2022-03-01 17:54:33,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:33,311 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:54:33,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:33,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897556637] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:33,360 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:33,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 29 [2022-03-01 17:54:33,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834616364] [2022-03-01 17:54:33,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:33,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:54:33,360 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:33,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:54:33,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:54:33,360 INFO L87 Difference]: Start difference. First operand 13475 states and 62034 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:35,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:35,374 INFO L93 Difference]: Finished difference Result 14582 states and 66324 transitions. [2022-03-01 17:54:35,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-01 17:54:35,374 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:54:35,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:35,422 INFO L225 Difference]: With dead ends: 14582 [2022-03-01 17:54:35,422 INFO L226 Difference]: Without dead ends: 14545 [2022-03-01 17:54:35,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=416, Invalid=2554, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 17:54:35,423 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 636 mSDsluCounter, 2472 mSDsCounter, 0 mSdLazyCounter, 2699 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 3483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 697 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:35,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 946 Invalid, 3483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2699 Invalid, 0 Unknown, 697 Unchecked, 1.1s Time] [2022-03-01 17:54:35,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14545 states. [2022-03-01 17:54:35,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14545 to 13439. [2022-03-01 17:54:35,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13439 states, 13438 states have (on average 4.605968150022325) internal successors, (61895), 13438 states have internal predecessors, (61895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:35,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13439 states to 13439 states and 61895 transitions. [2022-03-01 17:54:35,799 INFO L78 Accepts]: Start accepts. Automaton has 13439 states and 61895 transitions. Word has length 33 [2022-03-01 17:54:35,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:35,799 INFO L470 AbstractCegarLoop]: Abstraction has 13439 states and 61895 transitions. [2022-03-01 17:54:35,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:35,799 INFO L276 IsEmpty]: Start isEmpty. Operand 13439 states and 61895 transitions. [2022-03-01 17:54:35,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:54:35,836 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:35,836 INFO L514 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] [2022-03-01 17:54:35,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:36,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:36,051 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:36,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:36,052 INFO L85 PathProgramCache]: Analyzing trace with hash -85793105, now seen corresponding path program 76 times [2022-03-01 17:54:36,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:36,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430501693] [2022-03-01 17:54:36,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:36,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:36,255 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:36,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430501693] [2022-03-01 17:54:36,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430501693] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:36,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101138445] [2022-03-01 17:54:36,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:54:36,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:36,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:36,257 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:36,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-03-01 17:54:36,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:54:36,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:36,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:54:36,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:36,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:36,579 INFO L387 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 37 treesize of output 21 [2022-03-01 17:54:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:36,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:36,973 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:54:36,973 INFO L387 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 27 treesize of output 48 [2022-03-01 17:54:37,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:37,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:37,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:37,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:37,041 INFO L387 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 27 treesize of output 7 [2022-03-01 17:54:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:37,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101138445] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:37,091 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:37,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 17:54:37,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793415538] [2022-03-01 17:54:37,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:37,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:54:37,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:37,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:54:37,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:54:37,092 INFO L87 Difference]: Start difference. First operand 13439 states and 61895 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:40,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:40,268 INFO L93 Difference]: Finished difference Result 15258 states and 69034 transitions. [2022-03-01 17:54:40,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-01 17:54:40,269 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:54:40,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:40,321 INFO L225 Difference]: With dead ends: 15258 [2022-03-01 17:54:40,321 INFO L226 Difference]: Without dead ends: 15188 [2022-03-01 17:54:40,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1846 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=605, Invalid=5557, Unknown=0, NotChecked=0, Total=6162 [2022-03-01 17:54:40,322 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 682 mSDsluCounter, 3470 mSDsCounter, 0 mSdLazyCounter, 4498 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 4648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 4498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:40,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 1390 Invalid, 4648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 4498 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-01 17:54:40,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15188 states. [2022-03-01 17:54:40,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15188 to 13495. [2022-03-01 17:54:40,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13495 states, 13494 states have (on average 4.607899807321773) internal successors, (62179), 13494 states have internal predecessors, (62179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:40,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13495 states to 13495 states and 62179 transitions. [2022-03-01 17:54:40,712 INFO L78 Accepts]: Start accepts. Automaton has 13495 states and 62179 transitions. Word has length 33 [2022-03-01 17:54:40,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:40,712 INFO L470 AbstractCegarLoop]: Abstraction has 13495 states and 62179 transitions. [2022-03-01 17:54:40,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:40,712 INFO L276 IsEmpty]: Start isEmpty. Operand 13495 states and 62179 transitions. [2022-03-01 17:54:40,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:54:40,741 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:40,741 INFO L514 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] [2022-03-01 17:54:40,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:40,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:40,957 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:40,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:40,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1217129040, now seen corresponding path program 10 times [2022-03-01 17:54:40,958 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:40,958 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778012144] [2022-03-01 17:54:40,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:40,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:41,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:41,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778012144] [2022-03-01 17:54:41,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778012144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:41,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200424126] [2022-03-01 17:54:41,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:54:41,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:41,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:41,128 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:41,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-03-01 17:54:41,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:54:41,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:41,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:54:41,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:41,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:41,468 INFO L387 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 [2022-03-01 17:54:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:41,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:41,835 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:54:41,835 INFO L387 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 27 treesize of output 48 [2022-03-01 17:54:41,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:41,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:41,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:41,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:41,900 INFO L387 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 27 treesize of output 7 [2022-03-01 17:54:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:41,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200424126] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:41,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:41,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-03-01 17:54:41,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233369167] [2022-03-01 17:54:41,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:41,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:54:41,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:41,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:54:41,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:54:41,950 INFO L87 Difference]: Start difference. First operand 13495 states and 62179 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:44,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:44,399 INFO L93 Difference]: Finished difference Result 15253 states and 68928 transitions. [2022-03-01 17:54:44,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-01 17:54:44,399 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:54:44,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:44,452 INFO L225 Difference]: With dead ends: 15253 [2022-03-01 17:54:44,452 INFO L226 Difference]: Without dead ends: 15117 [2022-03-01 17:54:44,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=544, Invalid=4148, Unknown=0, NotChecked=0, Total=4692 [2022-03-01 17:54:44,453 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 714 mSDsluCounter, 2597 mSDsCounter, 0 mSdLazyCounter, 3290 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 3433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 3290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:44,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 1056 Invalid, 3433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 3290 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-01 17:54:44,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15117 states. [2022-03-01 17:54:44,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15117 to 13368. [2022-03-01 17:54:44,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13368 states, 13367 states have (on average 4.613451036133762) internal successors, (61668), 13367 states have internal predecessors, (61668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:44,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13368 states to 13368 states and 61668 transitions. [2022-03-01 17:54:44,939 INFO L78 Accepts]: Start accepts. Automaton has 13368 states and 61668 transitions. Word has length 33 [2022-03-01 17:54:44,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:44,939 INFO L470 AbstractCegarLoop]: Abstraction has 13368 states and 61668 transitions. [2022-03-01 17:54:44,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:44,939 INFO L276 IsEmpty]: Start isEmpty. Operand 13368 states and 61668 transitions. [2022-03-01 17:54:44,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:54:44,969 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:44,969 INFO L514 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] [2022-03-01 17:54:44,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-03-01 17:54:45,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:45,170 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:45,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:45,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1950848000, now seen corresponding path program 11 times [2022-03-01 17:54:45,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:45,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380865604] [2022-03-01 17:54:45,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:45,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:45,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:45,400 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:45,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380865604] [2022-03-01 17:54:45,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380865604] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:45,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462356731] [2022-03-01 17:54:45,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:54:45,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:45,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:45,401 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:45,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-03-01 17:54:45,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:54:45,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:45,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:54:45,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:45,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:45,682 INFO L387 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 37 treesize of output 21 [2022-03-01 17:54:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:45,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:46,052 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:54:46,053 INFO L387 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 27 treesize of output 48 [2022-03-01 17:54:46,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:46,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:46,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:46,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:46,105 INFO L387 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 27 treesize of output 7 [2022-03-01 17:54:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:46,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462356731] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:46,145 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:46,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 17:54:46,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421503723] [2022-03-01 17:54:46,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:46,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:54:46,145 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:46,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:54:46,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:54:46,146 INFO L87 Difference]: Start difference. First operand 13368 states and 61668 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:51,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:51,028 INFO L93 Difference]: Finished difference Result 17311 states and 76331 transitions. [2022-03-01 17:54:51,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-01 17:54:51,028 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:54:51,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:51,089 INFO L225 Difference]: With dead ends: 17311 [2022-03-01 17:54:51,089 INFO L226 Difference]: Without dead ends: 17195 [2022-03-01 17:54:51,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3001 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1134, Invalid=8178, Unknown=0, NotChecked=0, Total=9312 [2022-03-01 17:54:51,090 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 1187 mSDsluCounter, 3533 mSDsCounter, 0 mSdLazyCounter, 4445 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 4713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 4445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:51,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1187 Valid, 1403 Invalid, 4713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 4445 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-01 17:54:51,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17195 states. [2022-03-01 17:54:51,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17195 to 13877. [2022-03-01 17:54:51,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13877 states, 13876 states have (on average 4.615451138656673) internal successors, (64044), 13876 states have internal predecessors, (64044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:51,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13877 states to 13877 states and 64044 transitions. [2022-03-01 17:54:51,461 INFO L78 Accepts]: Start accepts. Automaton has 13877 states and 64044 transitions. Word has length 33 [2022-03-01 17:54:51,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:51,461 INFO L470 AbstractCegarLoop]: Abstraction has 13877 states and 64044 transitions. [2022-03-01 17:54:51,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:51,461 INFO L276 IsEmpty]: Start isEmpty. Operand 13877 states and 64044 transitions. [2022-03-01 17:54:51,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:54:51,494 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:51,494 INFO L514 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] [2022-03-01 17:54:51,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:51,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2022-03-01 17:54:51,710 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:51,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:51,710 INFO L85 PathProgramCache]: Analyzing trace with hash 154751753, now seen corresponding path program 77 times [2022-03-01 17:54:51,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:51,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231099138] [2022-03-01 17:54:51,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:51,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:51,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:51,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:51,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231099138] [2022-03-01 17:54:51,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231099138] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:51,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101267615] [2022-03-01 17:54:51,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:54:51,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:51,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:51,973 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:51,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-03-01 17:54:52,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:54:52,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:52,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:54:52,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:52,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:52,252 INFO L387 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 37 treesize of output 21 [2022-03-01 17:54:52,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:52,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:52,626 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:54:52,626 INFO L387 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 27 treesize of output 48 [2022-03-01 17:54:52,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:52,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:54:52,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:52,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:52,693 INFO L387 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 27 treesize of output 7 [2022-03-01 17:54:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:52,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101267615] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:52,741 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:52,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 17:54:52,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997259678] [2022-03-01 17:54:52,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:52,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:54:52,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:52,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:54:52,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:54:52,742 INFO L87 Difference]: Start difference. First operand 13877 states and 64044 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:56,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:54:56,860 INFO L93 Difference]: Finished difference Result 16887 states and 74647 transitions. [2022-03-01 17:54:56,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-01 17:54:56,860 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:54:56,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:54:56,924 INFO L225 Difference]: With dead ends: 16887 [2022-03-01 17:54:56,925 INFO L226 Difference]: Without dead ends: 16688 [2022-03-01 17:54:56,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2231 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=922, Invalid=6218, Unknown=0, NotChecked=0, Total=7140 [2022-03-01 17:54:56,927 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 922 mSDsluCounter, 3156 mSDsCounter, 0 mSdLazyCounter, 3909 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 4117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 3909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:54:56,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [922 Valid, 1310 Invalid, 4117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 3909 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-01 17:54:56,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16688 states. [2022-03-01 17:54:57,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16688 to 13644. [2022-03-01 17:54:57,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13644 states, 13643 states have (on average 4.622590339368174) internal successors, (63066), 13643 states have internal predecessors, (63066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:57,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13644 states to 13644 states and 63066 transitions. [2022-03-01 17:54:57,333 INFO L78 Accepts]: Start accepts. Automaton has 13644 states and 63066 transitions. Word has length 33 [2022-03-01 17:54:57,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:54:57,333 INFO L470 AbstractCegarLoop]: Abstraction has 13644 states and 63066 transitions. [2022-03-01 17:54:57,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:54:57,333 INFO L276 IsEmpty]: Start isEmpty. Operand 13644 states and 63066 transitions. [2022-03-01 17:54:57,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:54:57,367 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:54:57,368 INFO L514 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] [2022-03-01 17:54:57,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2022-03-01 17:54:57,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:57,584 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:54:57,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:54:57,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1957996389, now seen corresponding path program 78 times [2022-03-01 17:54:57,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:54:57,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222807963] [2022-03-01 17:54:57,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:54:57,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:54:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:54:57,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:57,841 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:54:57,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222807963] [2022-03-01 17:54:57,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222807963] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:54:57,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234702655] [2022-03-01 17:54:57,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:54:57,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:54:57,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:54:57,842 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:54:57,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-03-01 17:54:57,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:54:57,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:54:57,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:54:57,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:54:58,127 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:58,127 INFO L387 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 [2022-03-01 17:54:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:58,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:54:58,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:54:58,788 INFO L387 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 17 treesize of output 22 [2022-03-01 17:54:58,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:54:58,796 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:54:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:54:58,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234702655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:54:58,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:54:58,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-01 17:54:58,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381375326] [2022-03-01 17:54:58,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:54:58,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:54:58,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:54:58,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:54:58,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:54:58,838 INFO L87 Difference]: Start difference. First operand 13644 states and 63066 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:02,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:02,577 INFO L93 Difference]: Finished difference Result 16340 states and 72549 transitions. [2022-03-01 17:55:02,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-01 17:55:02,578 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:55:02,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:02,646 INFO L225 Difference]: With dead ends: 16340 [2022-03-01 17:55:02,646 INFO L226 Difference]: Without dead ends: 16295 [2022-03-01 17:55:02,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 50 SyntacticMatches, 14 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=617, Invalid=5235, Unknown=0, NotChecked=0, Total=5852 [2022-03-01 17:55:02,647 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 870 mSDsluCounter, 3755 mSDsCounter, 0 mSdLazyCounter, 3871 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 870 SdHoareTripleChecker+Valid, 1527 SdHoareTripleChecker+Invalid, 4814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 3871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 830 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:02,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [870 Valid, 1527 Invalid, 4814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 3871 Invalid, 0 Unknown, 830 Unchecked, 1.4s Time] [2022-03-01 17:55:02,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16295 states. [2022-03-01 17:55:02,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16295 to 13990. [2022-03-01 17:55:03,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13990 states, 13989 states have (on average 4.611480448924155) internal successors, (64510), 13989 states have internal predecessors, (64510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:03,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13990 states to 13990 states and 64510 transitions. [2022-03-01 17:55:03,066 INFO L78 Accepts]: Start accepts. Automaton has 13990 states and 64510 transitions. Word has length 33 [2022-03-01 17:55:03,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:03,066 INFO L470 AbstractCegarLoop]: Abstraction has 13990 states and 64510 transitions. [2022-03-01 17:55:03,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:03,066 INFO L276 IsEmpty]: Start isEmpty. Operand 13990 states and 64510 transitions. [2022-03-01 17:55:03,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:55:03,100 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:03,100 INFO L514 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] [2022-03-01 17:55:03,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:03,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable185 [2022-03-01 17:55:03,315 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:03,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:03,316 INFO L85 PathProgramCache]: Analyzing trace with hash 556372605, now seen corresponding path program 79 times [2022-03-01 17:55:03,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:03,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697863763] [2022-03-01 17:55:03,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:03,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:03,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:03,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697863763] [2022-03-01 17:55:03,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697863763] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:03,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216077647] [2022-03-01 17:55:03,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:55:03,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:03,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:03,572 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:03,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-03-01 17:55:03,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:03,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:55:03,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:03,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:03,979 INFO L387 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 [2022-03-01 17:55:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:04,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:04,313 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:55:04,313 INFO L387 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 27 treesize of output 48 [2022-03-01 17:55:04,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:04,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:04,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:04,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:04,355 INFO L387 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 27 treesize of output 7 [2022-03-01 17:55:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:04,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216077647] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:04,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:04,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 17:55:04,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469398533] [2022-03-01 17:55:04,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:04,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:55:04,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:04,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:55:04,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:55:04,385 INFO L87 Difference]: Start difference. First operand 13990 states and 64510 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:08,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:08,386 INFO L93 Difference]: Finished difference Result 17717 states and 77823 transitions. [2022-03-01 17:55:08,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-01 17:55:08,386 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:55:08,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:08,450 INFO L225 Difference]: With dead ends: 17717 [2022-03-01 17:55:08,450 INFO L226 Difference]: Without dead ends: 17624 [2022-03-01 17:55:08,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3103 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=976, Invalid=8726, Unknown=0, NotChecked=0, Total=9702 [2022-03-01 17:55:08,452 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1025 mSDsluCounter, 4238 mSDsCounter, 0 mSdLazyCounter, 5401 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 5614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 5401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:08,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1025 Valid, 1638 Invalid, 5614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 5401 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-01 17:55:08,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17624 states. [2022-03-01 17:55:08,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17624 to 14382. [2022-03-01 17:55:08,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14382 states, 14381 states have (on average 4.611640358806759) internal successors, (66320), 14381 states have internal predecessors, (66320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:08,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14382 states to 14382 states and 66320 transitions. [2022-03-01 17:55:08,914 INFO L78 Accepts]: Start accepts. Automaton has 14382 states and 66320 transitions. Word has length 33 [2022-03-01 17:55:08,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:08,914 INFO L470 AbstractCegarLoop]: Abstraction has 14382 states and 66320 transitions. [2022-03-01 17:55:08,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:08,914 INFO L276 IsEmpty]: Start isEmpty. Operand 14382 states and 66320 transitions. [2022-03-01 17:55:08,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:55:08,948 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:08,948 INFO L514 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] [2022-03-01 17:55:08,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-03-01 17:55:09,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:09,163 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:09,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:09,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1649347995, now seen corresponding path program 80 times [2022-03-01 17:55:09,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:09,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065192871] [2022-03-01 17:55:09,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:09,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:09,450 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:09,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065192871] [2022-03-01 17:55:09,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065192871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:09,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980023007] [2022-03-01 17:55:09,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:55:09,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:09,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:09,452 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:09,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-03-01 17:55:09,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:55:09,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:09,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:55:09,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:09,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:09,766 INFO L387 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 33 treesize of output 49 [2022-03-01 17:55:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:10,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:10,598 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:10,598 INFO L387 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 17 treesize of output 22 [2022-03-01 17:55:10,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:10,609 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:55:10,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:10,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980023007] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:10,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:10,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-01 17:55:10,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639121322] [2022-03-01 17:55:10,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:10,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:55:10,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:10,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:55:10,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:55:10,658 INFO L87 Difference]: Start difference. First operand 14382 states and 66320 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:14,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:14,050 INFO L93 Difference]: Finished difference Result 17214 states and 75992 transitions. [2022-03-01 17:55:14,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-01 17:55:14,050 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:55:14,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:14,107 INFO L225 Difference]: With dead ends: 17214 [2022-03-01 17:55:14,107 INFO L226 Difference]: Without dead ends: 17120 [2022-03-01 17:55:14,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=654, Invalid=4896, Unknown=0, NotChecked=0, Total=5550 [2022-03-01 17:55:14,107 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 1151 mSDsluCounter, 3133 mSDsCounter, 0 mSdLazyCounter, 3385 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 4475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 3385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 931 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:14,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1151 Valid, 1131 Invalid, 4475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 3385 Invalid, 0 Unknown, 931 Unchecked, 1.4s Time] [2022-03-01 17:55:14,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17120 states. [2022-03-01 17:55:14,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17120 to 14420. [2022-03-01 17:55:14,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14420 states, 14419 states have (on average 4.612871905125182) internal successors, (66513), 14419 states have internal predecessors, (66513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:14,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14420 states to 14420 states and 66513 transitions. [2022-03-01 17:55:14,490 INFO L78 Accepts]: Start accepts. Automaton has 14420 states and 66513 transitions. Word has length 33 [2022-03-01 17:55:14,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:14,490 INFO L470 AbstractCegarLoop]: Abstraction has 14420 states and 66513 transitions. [2022-03-01 17:55:14,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:14,490 INFO L276 IsEmpty]: Start isEmpty. Operand 14420 states and 66513 transitions. [2022-03-01 17:55:14,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:55:14,523 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:14,523 INFO L514 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] [2022-03-01 17:55:14,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:14,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:14,739 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:14,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:14,739 INFO L85 PathProgramCache]: Analyzing trace with hash 950808259, now seen corresponding path program 81 times [2022-03-01 17:55:14,739 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:14,739 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464163349] [2022-03-01 17:55:14,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:14,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:14,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:14,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464163349] [2022-03-01 17:55:14,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464163349] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:14,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133204345] [2022-03-01 17:55:14,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:55:14,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:14,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:14,987 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:14,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-03-01 17:55:15,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:55:15,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:15,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-01 17:55:15,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:15,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:15,349 INFO L387 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 33 treesize of output 21 [2022-03-01 17:55:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:15,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:15,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133204345] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:15,940 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:15,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-03-01 17:55:15,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497556355] [2022-03-01 17:55:15,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:15,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 17:55:15,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:15,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 17:55:15,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:55:15,941 INFO L87 Difference]: Start difference. First operand 14420 states and 66513 transitions. Second operand has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:21,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:21,998 INFO L93 Difference]: Finished difference Result 20636 states and 90422 transitions. [2022-03-01 17:55:21,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-01 17:55:21,998 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:55:21,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:22,066 INFO L225 Difference]: With dead ends: 20636 [2022-03-01 17:55:22,066 INFO L226 Difference]: Without dead ends: 20566 [2022-03-01 17:55:22,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3343 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1426, Invalid=8876, Unknown=0, NotChecked=0, Total=10302 [2022-03-01 17:55:22,068 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 1319 mSDsluCounter, 4232 mSDsCounter, 0 mSdLazyCounter, 5252 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1319 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 5596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 5252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:22,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1319 Valid, 1638 Invalid, 5596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 5252 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-01 17:55:22,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20566 states. [2022-03-01 17:55:22,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20566 to 15044. [2022-03-01 17:55:22,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15044 states, 15043 states have (on average 4.6553878880542445) internal successors, (70031), 15043 states have internal predecessors, (70031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:22,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15044 states to 15044 states and 70031 transitions. [2022-03-01 17:55:22,581 INFO L78 Accepts]: Start accepts. Automaton has 15044 states and 70031 transitions. Word has length 33 [2022-03-01 17:55:22,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:22,581 INFO L470 AbstractCegarLoop]: Abstraction has 15044 states and 70031 transitions. [2022-03-01 17:55:22,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.411764705882353) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:22,581 INFO L276 IsEmpty]: Start isEmpty. Operand 15044 states and 70031 transitions. [2022-03-01 17:55:22,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:55:22,613 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:22,613 INFO L514 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] [2022-03-01 17:55:22,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2022-03-01 17:55:22,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-03-01 17:55:22,827 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:22,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:22,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1259566239, now seen corresponding path program 82 times [2022-03-01 17:55:22,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:22,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22338968] [2022-03-01 17:55:22,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:22,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:23,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:23,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22338968] [2022-03-01 17:55:23,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22338968] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:23,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273398881] [2022-03-01 17:55:23,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:55:23,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:23,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:23,038 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:23,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-03-01 17:55:23,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:55:23,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:23,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:55:23,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:23,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:23,278 INFO L387 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 [2022-03-01 17:55:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:23,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:23,568 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:55:23,568 INFO L387 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 27 treesize of output 48 [2022-03-01 17:55:23,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:23,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:23,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:23,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:23,603 INFO L387 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 27 treesize of output 7 [2022-03-01 17:55:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:23,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273398881] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:23,633 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:23,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 17:55:23,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621609788] [2022-03-01 17:55:23,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:23,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:55:23,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:23,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:55:23,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:55:23,634 INFO L87 Difference]: Start difference. First operand 15044 states and 70031 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:27,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:27,595 INFO L93 Difference]: Finished difference Result 17637 states and 79021 transitions. [2022-03-01 17:55:27,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-01 17:55:27,596 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:55:27,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:27,655 INFO L225 Difference]: With dead ends: 17637 [2022-03-01 17:55:27,655 INFO L226 Difference]: Without dead ends: 17500 [2022-03-01 17:55:27,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2771 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=865, Invalid=8065, Unknown=0, NotChecked=0, Total=8930 [2022-03-01 17:55:27,656 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1038 mSDsluCounter, 4251 mSDsCounter, 0 mSdLazyCounter, 5254 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 1634 SdHoareTripleChecker+Invalid, 5655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 5254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:27,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1038 Valid, 1634 Invalid, 5655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 5254 Invalid, 0 Unknown, 165 Unchecked, 1.9s Time] [2022-03-01 17:55:27,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17500 states. [2022-03-01 17:55:28,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17500 to 15001. [2022-03-01 17:55:28,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15001 states, 15000 states have (on average 4.658066666666667) internal successors, (69871), 15000 states have internal predecessors, (69871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:28,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15001 states to 15001 states and 69871 transitions. [2022-03-01 17:55:28,096 INFO L78 Accepts]: Start accepts. Automaton has 15001 states and 69871 transitions. Word has length 33 [2022-03-01 17:55:28,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:28,097 INFO L470 AbstractCegarLoop]: Abstraction has 15001 states and 69871 transitions. [2022-03-01 17:55:28,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:28,097 INFO L276 IsEmpty]: Start isEmpty. Operand 15001 states and 69871 transitions. [2022-03-01 17:55:28,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:55:28,133 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:28,133 INFO L514 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] [2022-03-01 17:55:28,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:28,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-03-01 17:55:28,350 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:28,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:28,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1205308463, now seen corresponding path program 83 times [2022-03-01 17:55:28,351 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:28,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862286519] [2022-03-01 17:55:28,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:28,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:28,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:28,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862286519] [2022-03-01 17:55:28,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862286519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:28,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14380590] [2022-03-01 17:55:28,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:55:28,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:28,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:28,476 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:28,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-03-01 17:55:28,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:55:28,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:28,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:55:28,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:28,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:28,696 INFO L387 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 37 treesize of output 21 [2022-03-01 17:55:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:28,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:29,028 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:55:29,028 INFO L387 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 27 treesize of output 48 [2022-03-01 17:55:29,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:29,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:29,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:29,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:29,070 INFO L387 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 27 treesize of output 7 [2022-03-01 17:55:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:29,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14380590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:29,100 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:29,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-03-01 17:55:29,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759761995] [2022-03-01 17:55:29,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:29,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:55:29,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:29,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:55:29,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:55:29,101 INFO L87 Difference]: Start difference. First operand 15001 states and 69871 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:30,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:30,974 INFO L93 Difference]: Finished difference Result 16718 states and 76386 transitions. [2022-03-01 17:55:30,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-01 17:55:30,974 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:55:30,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:31,033 INFO L225 Difference]: With dead ends: 16718 [2022-03-01 17:55:31,033 INFO L226 Difference]: Without dead ends: 16614 [2022-03-01 17:55:31,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=678, Invalid=5022, Unknown=0, NotChecked=0, Total=5700 [2022-03-01 17:55:31,034 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 746 mSDsluCounter, 2443 mSDsCounter, 0 mSdLazyCounter, 3184 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 3330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 3184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:31,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 998 Invalid, 3330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 3184 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 17:55:31,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16614 states. [2022-03-01 17:55:31,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16614 to 15258. [2022-03-01 17:55:31,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15258 states, 15257 states have (on average 4.659041751327259) internal successors, (71083), 15257 states have internal predecessors, (71083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:31,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15258 states to 15258 states and 71083 transitions. [2022-03-01 17:55:31,560 INFO L78 Accepts]: Start accepts. Automaton has 15258 states and 71083 transitions. Word has length 33 [2022-03-01 17:55:31,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:31,560 INFO L470 AbstractCegarLoop]: Abstraction has 15258 states and 71083 transitions. [2022-03-01 17:55:31,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:31,560 INFO L276 IsEmpty]: Start isEmpty. Operand 15258 states and 71083 transitions. [2022-03-01 17:55:31,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:55:31,595 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:31,595 INFO L514 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] [2022-03-01 17:55:31,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-03-01 17:55:31,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:31,811 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:31,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:31,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1151921943, now seen corresponding path program 84 times [2022-03-01 17:55:31,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:31,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330207487] [2022-03-01 17:55:31,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:31,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:31,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:31,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:31,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330207487] [2022-03-01 17:55:31,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330207487] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:31,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812856963] [2022-03-01 17:55:31,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:55:31,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:31,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:31,977 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:31,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-03-01 17:55:32,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:55:32,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:32,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 17:55:32,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:32,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:32,199 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:55:32,199 INFO L387 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 33 treesize of output 57 [2022-03-01 17:55:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:32,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:32,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812856963] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:32,622 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:32,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 32 [2022-03-01 17:55:32,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382536801] [2022-03-01 17:55:32,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:32,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:55:32,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:32,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:55:32,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:55:32,623 INFO L87 Difference]: Start difference. First operand 15258 states and 71083 transitions. Second operand has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:35,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:35,743 INFO L93 Difference]: Finished difference Result 18861 states and 84076 transitions. [2022-03-01 17:55:35,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 17:55:35,744 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:55:35,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:35,804 INFO L225 Difference]: With dead ends: 18861 [2022-03-01 17:55:35,804 INFO L226 Difference]: Without dead ends: 18759 [2022-03-01 17:55:35,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1580 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=676, Invalid=4874, Unknown=0, NotChecked=0, Total=5550 [2022-03-01 17:55:35,804 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1317 mSDsluCounter, 3482 mSDsCounter, 0 mSdLazyCounter, 4344 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1317 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 4533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 4344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:35,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1317 Valid, 1375 Invalid, 4533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 4344 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-01 17:55:35,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18759 states. [2022-03-01 17:55:36,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18759 to 15447. [2022-03-01 17:55:36,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15447 states, 15446 states have (on average 4.659264534507316) internal successors, (71967), 15446 states have internal predecessors, (71967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:36,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15447 states to 15447 states and 71967 transitions. [2022-03-01 17:55:36,238 INFO L78 Accepts]: Start accepts. Automaton has 15447 states and 71967 transitions. Word has length 33 [2022-03-01 17:55:36,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:36,238 INFO L470 AbstractCegarLoop]: Abstraction has 15447 states and 71967 transitions. [2022-03-01 17:55:36,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:36,238 INFO L276 IsEmpty]: Start isEmpty. Operand 15447 states and 71967 transitions. [2022-03-01 17:55:36,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:55:36,272 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:36,272 INFO L514 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] [2022-03-01 17:55:36,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:36,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2022-03-01 17:55:36,488 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:36,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:36,488 INFO L85 PathProgramCache]: Analyzing trace with hash -142329247, now seen corresponding path program 85 times [2022-03-01 17:55:36,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:36,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917930744] [2022-03-01 17:55:36,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:36,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:36,622 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:36,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917930744] [2022-03-01 17:55:36,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917930744] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:36,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138544451] [2022-03-01 17:55:36,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:55:36,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:36,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:36,623 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:36,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-03-01 17:55:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:36,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:55:36,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:36,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:36,877 INFO L387 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 37 treesize of output 21 [2022-03-01 17:55:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:36,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:37,249 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:55:37,249 INFO L387 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 27 treesize of output 48 [2022-03-01 17:55:37,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:37,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:37,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:37,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:37,288 INFO L387 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 27 treesize of output 7 [2022-03-01 17:55:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:37,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138544451] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:37,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:37,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 17:55:37,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984274526] [2022-03-01 17:55:37,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:37,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:55:37,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:37,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:55:37,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:55:37,318 INFO L87 Difference]: Start difference. First operand 15447 states and 71967 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:39,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:39,730 INFO L93 Difference]: Finished difference Result 16976 states and 77789 transitions. [2022-03-01 17:55:39,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-01 17:55:39,730 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:55:39,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:39,793 INFO L225 Difference]: With dead ends: 16976 [2022-03-01 17:55:39,793 INFO L226 Difference]: Without dead ends: 16789 [2022-03-01 17:55:39,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2134 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=754, Invalid=6052, Unknown=0, NotChecked=0, Total=6806 [2022-03-01 17:55:39,794 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 778 mSDsluCounter, 2541 mSDsCounter, 0 mSdLazyCounter, 3301 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 3463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 3301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:39,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 1038 Invalid, 3463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 3301 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-01 17:55:39,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16789 states. [2022-03-01 17:55:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16789 to 15392. [2022-03-01 17:55:40,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15392 states, 15391 states have (on average 4.659866155545449) internal successors, (71720), 15391 states have internal predecessors, (71720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:40,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15392 states to 15392 states and 71720 transitions. [2022-03-01 17:55:40,253 INFO L78 Accepts]: Start accepts. Automaton has 15392 states and 71720 transitions. Word has length 33 [2022-03-01 17:55:40,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:40,253 INFO L470 AbstractCegarLoop]: Abstraction has 15392 states and 71720 transitions. [2022-03-01 17:55:40,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:40,253 INFO L276 IsEmpty]: Start isEmpty. Operand 15392 states and 71720 transitions. [2022-03-01 17:55:40,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:55:40,288 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:40,288 INFO L514 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] [2022-03-01 17:55:40,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-03-01 17:55:40,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:40,503 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:40,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:40,504 INFO L85 PathProgramCache]: Analyzing trace with hash -654878009, now seen corresponding path program 86 times [2022-03-01 17:55:40,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:40,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816426246] [2022-03-01 17:55:40,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:40,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:40,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:40,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816426246] [2022-03-01 17:55:40,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816426246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:40,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246577813] [2022-03-01 17:55:40,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:55:40,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:40,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:40,658 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:40,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-03-01 17:55:40,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:55:40,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:40,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:55:40,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:40,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:40,950 INFO L387 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 [2022-03-01 17:55:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:41,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:41,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:41,618 INFO L387 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 17 treesize of output 22 [2022-03-01 17:55:41,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:41,626 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:55:41,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:41,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246577813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:41,666 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:41,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-03-01 17:55:41,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407165523] [2022-03-01 17:55:41,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:41,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:55:41,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:41,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:55:41,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:55:41,667 INFO L87 Difference]: Start difference. First operand 15392 states and 71720 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:43,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:43,319 INFO L93 Difference]: Finished difference Result 16443 states and 75671 transitions. [2022-03-01 17:55:43,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:55:43,320 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:55:43,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:43,372 INFO L225 Difference]: With dead ends: 16443 [2022-03-01 17:55:43,372 INFO L226 Difference]: Without dead ends: 16426 [2022-03-01 17:55:43,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=318, Invalid=2232, Unknown=0, NotChecked=0, Total=2550 [2022-03-01 17:55:43,372 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 527 mSDsluCounter, 2256 mSDsCounter, 0 mSdLazyCounter, 2602 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 3211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 536 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:43,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 884 Invalid, 3211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2602 Invalid, 0 Unknown, 536 Unchecked, 0.9s Time] [2022-03-01 17:55:43,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16426 states. [2022-03-01 17:55:43,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16426 to 15399. [2022-03-01 17:55:43,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15399 states, 15398 states have (on average 4.660085725418885) internal successors, (71756), 15398 states have internal predecessors, (71756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:43,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15399 states to 15399 states and 71756 transitions. [2022-03-01 17:55:43,726 INFO L78 Accepts]: Start accepts. Automaton has 15399 states and 71756 transitions. Word has length 33 [2022-03-01 17:55:43,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:43,726 INFO L470 AbstractCegarLoop]: Abstraction has 15399 states and 71756 transitions. [2022-03-01 17:55:43,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:43,726 INFO L276 IsEmpty]: Start isEmpty. Operand 15399 states and 71756 transitions. [2022-03-01 17:55:43,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:55:43,761 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:43,761 INFO L514 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] [2022-03-01 17:55:43,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:43,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:43,975 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:43,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:43,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1554240081, now seen corresponding path program 87 times [2022-03-01 17:55:43,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:43,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580507893] [2022-03-01 17:55:43,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:43,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:44,215 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:44,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580507893] [2022-03-01 17:55:44,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580507893] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:44,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592773664] [2022-03-01 17:55:44,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:55:44,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:44,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:44,216 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:44,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-03-01 17:55:44,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:55:44,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:44,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:55:44,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:44,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:44,558 INFO L387 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 33 treesize of output 49 [2022-03-01 17:55:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:45,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:45,888 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:55:45,888 INFO L387 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 17 treesize of output 22 [2022-03-01 17:55:45,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:45,898 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:55:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:45,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592773664] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:45,948 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:45,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-01 17:55:45,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157199081] [2022-03-01 17:55:45,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:45,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:55:45,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:45,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:55:45,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1063, Unknown=1, NotChecked=0, Total=1190 [2022-03-01 17:55:45,949 INFO L87 Difference]: Start difference. First operand 15399 states and 71756 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:49,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:49,508 INFO L93 Difference]: Finished difference Result 18711 states and 83306 transitions. [2022-03-01 17:55:49,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-01 17:55:49,509 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:55:49,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:49,574 INFO L225 Difference]: With dead ends: 18711 [2022-03-01 17:55:49,574 INFO L226 Difference]: Without dead ends: 18689 [2022-03-01 17:55:49,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2042 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=595, Invalid=5884, Unknown=1, NotChecked=0, Total=6480 [2022-03-01 17:55:49,576 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 878 mSDsluCounter, 4037 mSDsCounter, 0 mSdLazyCounter, 4363 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 1700 SdHoareTripleChecker+Invalid, 5305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 4363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 854 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:49,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [878 Valid, 1700 Invalid, 5305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 4363 Invalid, 0 Unknown, 854 Unchecked, 1.8s Time] [2022-03-01 17:55:49,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18689 states. [2022-03-01 17:55:49,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18689 to 15678. [2022-03-01 17:55:49,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15678 states, 15677 states have (on average 4.658671939784398) internal successors, (73034), 15677 states have internal predecessors, (73034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:50,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15678 states to 15678 states and 73034 transitions. [2022-03-01 17:55:50,151 INFO L78 Accepts]: Start accepts. Automaton has 15678 states and 73034 transitions. Word has length 33 [2022-03-01 17:55:50,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:50,151 INFO L470 AbstractCegarLoop]: Abstraction has 15678 states and 73034 transitions. [2022-03-01 17:55:50,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:50,151 INFO L276 IsEmpty]: Start isEmpty. Operand 15678 states and 73034 transitions. [2022-03-01 17:55:50,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:55:50,193 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:50,193 INFO L514 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] [2022-03-01 17:55:50,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:50,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:50,410 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:50,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:50,411 INFO L85 PathProgramCache]: Analyzing trace with hash 960128913, now seen corresponding path program 88 times [2022-03-01 17:55:50,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:50,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115688371] [2022-03-01 17:55:50,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:50,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:50,578 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:50,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115688371] [2022-03-01 17:55:50,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115688371] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:50,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108211262] [2022-03-01 17:55:50,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:55:50,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:50,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:50,581 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:50,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-03-01 17:55:50,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:55:50,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:50,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:55:50,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:50,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:50,844 INFO L387 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 37 treesize of output 21 [2022-03-01 17:55:50,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:50,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:51,108 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:55:51,109 INFO L387 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 27 treesize of output 48 [2022-03-01 17:55:51,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:51,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:51,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:51,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:51,155 INFO L387 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 27 treesize of output 7 [2022-03-01 17:55:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:51,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108211262] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:51,189 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:51,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 17:55:51,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270773373] [2022-03-01 17:55:51,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:51,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:55:51,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:51,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:55:51,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:55:51,193 INFO L87 Difference]: Start difference. First operand 15678 states and 73034 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:55,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:55,556 INFO L93 Difference]: Finished difference Result 19928 states and 88107 transitions. [2022-03-01 17:55:55,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-01 17:55:55,556 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:55:55,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:55:55,627 INFO L225 Difference]: With dead ends: 19928 [2022-03-01 17:55:55,627 INFO L226 Difference]: Without dead ends: 19813 [2022-03-01 17:55:55,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3509 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1047, Invalid=9459, Unknown=0, NotChecked=0, Total=10506 [2022-03-01 17:55:55,628 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1207 mSDsluCounter, 3820 mSDsCounter, 0 mSdLazyCounter, 4897 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 5095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 4897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:55:55,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1207 Valid, 1482 Invalid, 5095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 4897 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-01 17:55:55,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19813 states. [2022-03-01 17:55:56,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19813 to 16009. [2022-03-01 17:55:56,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16009 states, 16008 states have (on average 4.664730134932534) internal successors, (74673), 16008 states have internal predecessors, (74673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:56,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16009 states to 16009 states and 74673 transitions. [2022-03-01 17:55:56,231 INFO L78 Accepts]: Start accepts. Automaton has 16009 states and 74673 transitions. Word has length 33 [2022-03-01 17:55:56,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:55:56,231 INFO L470 AbstractCegarLoop]: Abstraction has 16009 states and 74673 transitions. [2022-03-01 17:55:56,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:56,231 INFO L276 IsEmpty]: Start isEmpty. Operand 16009 states and 74673 transitions. [2022-03-01 17:55:56,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:55:56,267 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:55:56,267 INFO L514 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] [2022-03-01 17:55:56,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-03-01 17:55:56,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:56,483 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:55:56,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:55:56,483 INFO L85 PathProgramCache]: Analyzing trace with hash -2002515719, now seen corresponding path program 89 times [2022-03-01 17:55:56,483 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:55:56,483 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82379771] [2022-03-01 17:55:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:55:56,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:55:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:55:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:56,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:55:56,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82379771] [2022-03-01 17:55:56,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82379771] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:55:56,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532435380] [2022-03-01 17:55:56,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:55:56,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:55:56,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:55:56,652 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:55:56,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-03-01 17:55:56,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:55:56,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:55:56,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:55:56,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:55:56,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:56,987 INFO L387 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 37 treesize of output 21 [2022-03-01 17:55:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:57,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:55:57,354 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:55:57,354 INFO L387 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 27 treesize of output 48 [2022-03-01 17:55:57,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:57,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:55:57,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:57,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:55:57,415 INFO L387 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 27 treesize of output 7 [2022-03-01 17:55:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:55:57,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532435380] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:55:57,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:55:57,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 17:55:57,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655638286] [2022-03-01 17:55:57,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:55:57,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:55:57,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:55:57,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:55:57,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:55:57,462 INFO L87 Difference]: Start difference. First operand 16009 states and 74673 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:55:59,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:55:59,984 INFO L93 Difference]: Finished difference Result 17781 states and 81478 transitions. [2022-03-01 17:55:59,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-01 17:55:59,984 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:55:59,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:00,044 INFO L225 Difference]: With dead ends: 17781 [2022-03-01 17:56:00,044 INFO L226 Difference]: Without dead ends: 17651 [2022-03-01 17:56:00,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=572, Invalid=5280, Unknown=0, NotChecked=0, Total=5852 [2022-03-01 17:56:00,044 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 700 mSDsluCounter, 2984 mSDsCounter, 0 mSdLazyCounter, 3379 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 4016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 3379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 492 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:00,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 1209 Invalid, 4016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 3379 Invalid, 0 Unknown, 492 Unchecked, 1.4s Time] [2022-03-01 17:56:00,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17651 states. [2022-03-01 17:56:00,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17651 to 15985. [2022-03-01 17:56:00,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15985 states, 15984 states have (on average 4.662787787787788) internal successors, (74530), 15984 states have internal predecessors, (74530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:00,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15985 states to 15985 states and 74530 transitions. [2022-03-01 17:56:00,441 INFO L78 Accepts]: Start accepts. Automaton has 15985 states and 74530 transitions. Word has length 33 [2022-03-01 17:56:00,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:00,441 INFO L470 AbstractCegarLoop]: Abstraction has 15985 states and 74530 transitions. [2022-03-01 17:56:00,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:00,441 INFO L276 IsEmpty]: Start isEmpty. Operand 15985 states and 74530 transitions. [2022-03-01 17:56:00,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:56:00,479 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:00,479 INFO L514 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] [2022-03-01 17:56:00,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-03-01 17:56:00,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:00,695 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:00,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:00,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1115012038, now seen corresponding path program 12 times [2022-03-01 17:56:00,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:00,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923483033] [2022-03-01 17:56:00,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:00,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:00,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:00,832 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:00,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923483033] [2022-03-01 17:56:00,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923483033] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:00,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166949948] [2022-03-01 17:56:00,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:56:00,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:00,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:00,833 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:00,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-03-01 17:56:00,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:56:00,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:00,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:56:00,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:01,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:01,188 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:56:01,188 INFO L387 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 32 treesize of output 56 [2022-03-01 17:56:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:01,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:56:01,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166949948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:01,682 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:01,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 30 [2022-03-01 17:56:01,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109359484] [2022-03-01 17:56:01,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:01,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:56:01,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:01,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:56:01,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:56:01,682 INFO L87 Difference]: Start difference. First operand 15985 states and 74530 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:04,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:04,334 INFO L93 Difference]: Finished difference Result 18228 states and 83086 transitions. [2022-03-01 17:56:04,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-01 17:56:04,334 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:56:04,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:04,395 INFO L225 Difference]: With dead ends: 18228 [2022-03-01 17:56:04,395 INFO L226 Difference]: Without dead ends: 18148 [2022-03-01 17:56:04,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=555, Invalid=4995, Unknown=0, NotChecked=0, Total=5550 [2022-03-01 17:56:04,396 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 918 mSDsluCounter, 2979 mSDsCounter, 0 mSdLazyCounter, 3923 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 4100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 3923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:04,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 1229 Invalid, 4100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 3923 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-01 17:56:04,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18148 states. [2022-03-01 17:56:04,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18148 to 16027. [2022-03-01 17:56:04,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16027 states, 16026 states have (on average 4.663234743541745) internal successors, (74733), 16026 states have internal predecessors, (74733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:04,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16027 states to 16027 states and 74733 transitions. [2022-03-01 17:56:04,840 INFO L78 Accepts]: Start accepts. Automaton has 16027 states and 74733 transitions. Word has length 33 [2022-03-01 17:56:04,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:04,840 INFO L470 AbstractCegarLoop]: Abstraction has 16027 states and 74733 transitions. [2022-03-01 17:56:04,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:04,840 INFO L276 IsEmpty]: Start isEmpty. Operand 16027 states and 74733 transitions. [2022-03-01 17:56:04,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:56:04,882 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:04,882 INFO L514 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] [2022-03-01 17:56:04,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-03-01 17:56:05,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:05,085 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:05,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:05,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1352994994, now seen corresponding path program 13 times [2022-03-01 17:56:05,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:05,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209371825] [2022-03-01 17:56:05,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:05,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:05,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:05,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:05,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209371825] [2022-03-01 17:56:05,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209371825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:05,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860211926] [2022-03-01 17:56:05,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:56:05,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:05,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:05,285 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:05,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-03-01 17:56:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:05,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:56:05,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:05,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:05,677 INFO L387 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 37 treesize of output 21 [2022-03-01 17:56:05,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:05,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:06,042 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:56:06,042 INFO L387 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 27 treesize of output 48 [2022-03-01 17:56:06,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:06,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:06,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:06,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:06,107 INFO L387 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 27 treesize of output 7 [2022-03-01 17:56:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:06,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860211926] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:06,160 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:06,160 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 17:56:06,160 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259061200] [2022-03-01 17:56:06,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:06,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:56:06,160 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:06,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:56:06,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:56:06,161 INFO L87 Difference]: Start difference. First operand 16027 states and 74733 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:08,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:08,790 INFO L93 Difference]: Finished difference Result 17634 states and 81016 transitions. [2022-03-01 17:56:08,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-01 17:56:08,790 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:56:08,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:08,852 INFO L225 Difference]: With dead ends: 17634 [2022-03-01 17:56:08,852 INFO L226 Difference]: Without dead ends: 17555 [2022-03-01 17:56:08,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=544, Invalid=5156, Unknown=0, NotChecked=0, Total=5700 [2022-03-01 17:56:08,853 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 694 mSDsluCounter, 2326 mSDsCounter, 0 mSdLazyCounter, 3028 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 3152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:08,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [694 Valid, 972 Invalid, 3152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 3028 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-01 17:56:08,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17555 states. [2022-03-01 17:56:09,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17555 to 15990. [2022-03-01 17:56:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15990 states, 15989 states have (on average 4.667396334980299) internal successors, (74627), 15989 states have internal predecessors, (74627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:09,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15990 states to 15990 states and 74627 transitions. [2022-03-01 17:56:09,251 INFO L78 Accepts]: Start accepts. Automaton has 15990 states and 74627 transitions. Word has length 33 [2022-03-01 17:56:09,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:09,251 INFO L470 AbstractCegarLoop]: Abstraction has 15990 states and 74627 transitions. [2022-03-01 17:56:09,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:09,252 INFO L276 IsEmpty]: Start isEmpty. Operand 15990 states and 74627 transitions. [2022-03-01 17:56:09,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:56:09,286 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:09,286 INFO L514 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] [2022-03-01 17:56:09,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-03-01 17:56:09,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2022-03-01 17:56:09,501 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:09,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:09,501 INFO L85 PathProgramCache]: Analyzing trace with hash 756920949, now seen corresponding path program 90 times [2022-03-01 17:56:09,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:09,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633003551] [2022-03-01 17:56:09,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:09,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:09,738 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:09,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633003551] [2022-03-01 17:56:09,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633003551] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:09,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64889804] [2022-03-01 17:56:09,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:56:09,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:09,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:09,739 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:09,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-03-01 17:56:09,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:56:09,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:09,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:56:09,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:10,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:10,102 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:56:10,103 INFO L387 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 [2022-03-01 17:56:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:10,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:56:10,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64889804] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:10,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:10,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 33 [2022-03-01 17:56:10,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351966876] [2022-03-01 17:56:10,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:10,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 17:56:10,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:10,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 17:56:10,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:56:10,790 INFO L87 Difference]: Start difference. First operand 15990 states and 74627 transitions. Second operand has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:15,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:15,603 INFO L93 Difference]: Finished difference Result 19522 states and 86559 transitions. [2022-03-01 17:56:15,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-01 17:56:15,604 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:56:15,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:15,754 INFO L225 Difference]: With dead ends: 19522 [2022-03-01 17:56:15,754 INFO L226 Difference]: Without dead ends: 19461 [2022-03-01 17:56:15,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2636 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=948, Invalid=7424, Unknown=0, NotChecked=0, Total=8372 [2022-03-01 17:56:15,755 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 1570 mSDsluCounter, 4214 mSDsCounter, 0 mSdLazyCounter, 5289 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1570 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 5500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 5289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:15,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1570 Valid, 1623 Invalid, 5500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 5289 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-01 17:56:15,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19461 states. [2022-03-01 17:56:16,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19461 to 16114. [2022-03-01 17:56:16,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16114 states, 16113 states have (on average 4.663749767268665) internal successors, (75147), 16113 states have internal predecessors, (75147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:16,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16114 states to 16114 states and 75147 transitions. [2022-03-01 17:56:16,241 INFO L78 Accepts]: Start accepts. Automaton has 16114 states and 75147 transitions. Word has length 33 [2022-03-01 17:56:16,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:16,241 INFO L470 AbstractCegarLoop]: Abstraction has 16114 states and 75147 transitions. [2022-03-01 17:56:16,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:16,241 INFO L276 IsEmpty]: Start isEmpty. Operand 16114 states and 75147 transitions. [2022-03-01 17:56:16,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:56:16,280 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:16,280 INFO L514 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] [2022-03-01 17:56:16,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:16,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-03-01 17:56:16,495 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:16,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:16,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1602896501, now seen corresponding path program 91 times [2022-03-01 17:56:16,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:16,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540671135] [2022-03-01 17:56:16,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:16,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:16,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:16,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:16,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540671135] [2022-03-01 17:56:16,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540671135] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:16,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924866511] [2022-03-01 17:56:16,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:56:16,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:16,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:16,730 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:16,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-03-01 17:56:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:16,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:56:16,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:17,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:17,119 INFO L387 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 37 treesize of output 21 [2022-03-01 17:56:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:17,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:17,502 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:56:17,502 INFO L387 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 27 treesize of output 48 [2022-03-01 17:56:17,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:17,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:17,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:17,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:17,572 INFO L387 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 27 treesize of output 7 [2022-03-01 17:56:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:17,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924866511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:17,620 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:17,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 17:56:17,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300134989] [2022-03-01 17:56:17,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:17,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:56:17,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:17,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:56:17,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:56:17,621 INFO L87 Difference]: Start difference. First operand 16114 states and 75147 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:22,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:22,765 INFO L93 Difference]: Finished difference Result 20429 states and 90191 transitions. [2022-03-01 17:56:22,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-01 17:56:22,766 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:56:22,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:22,836 INFO L225 Difference]: With dead ends: 20429 [2022-03-01 17:56:22,836 INFO L226 Difference]: Without dead ends: 20249 [2022-03-01 17:56:22,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3783 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1160, Invalid=9970, Unknown=0, NotChecked=0, Total=11130 [2022-03-01 17:56:22,838 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 1240 mSDsluCounter, 4113 mSDsCounter, 0 mSdLazyCounter, 4950 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1240 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 5675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 4950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 526 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:22,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1240 Valid, 1523 Invalid, 5675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 4950 Invalid, 0 Unknown, 526 Unchecked, 2.0s Time] [2022-03-01 17:56:22,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20249 states. [2022-03-01 17:56:23,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20249 to 16303. [2022-03-01 17:56:23,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16303 states, 16302 states have (on average 4.6705312231628024) internal successors, (76139), 16302 states have internal predecessors, (76139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:23,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16303 states to 16303 states and 76139 transitions. [2022-03-01 17:56:23,413 INFO L78 Accepts]: Start accepts. Automaton has 16303 states and 76139 transitions. Word has length 33 [2022-03-01 17:56:23,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:23,414 INFO L470 AbstractCegarLoop]: Abstraction has 16303 states and 76139 transitions. [2022-03-01 17:56:23,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:23,414 INFO L276 IsEmpty]: Start isEmpty. Operand 16303 states and 76139 transitions. [2022-03-01 17:56:23,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:56:23,448 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:23,448 INFO L514 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] [2022-03-01 17:56:23,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:23,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:23,663 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:23,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:23,664 INFO L85 PathProgramCache]: Analyzing trace with hash -62579695, now seen corresponding path program 92 times [2022-03-01 17:56:23,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:23,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096210461] [2022-03-01 17:56:23,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:23,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:23,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:23,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:23,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096210461] [2022-03-01 17:56:23,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096210461] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:23,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203945167] [2022-03-01 17:56:23,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:56:23,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:23,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:23,847 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:23,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-03-01 17:56:23,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:56:23,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:23,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:56:23,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:24,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:24,175 INFO L387 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 [2022-03-01 17:56:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:24,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:24,769 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:24,770 INFO L387 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 17 treesize of output 22 [2022-03-01 17:56:24,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:24,779 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:56:24,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:24,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203945167] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:24,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:24,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-01 17:56:24,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253477302] [2022-03-01 17:56:24,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:24,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:56:24,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:24,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:56:24,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:56:24,830 INFO L87 Difference]: Start difference. First operand 16303 states and 76139 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:26,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:26,804 INFO L93 Difference]: Finished difference Result 16950 states and 78639 transitions. [2022-03-01 17:56:26,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:56:26,804 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:56:26,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:26,859 INFO L225 Difference]: With dead ends: 16950 [2022-03-01 17:56:26,859 INFO L226 Difference]: Without dead ends: 16921 [2022-03-01 17:56:26,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=285, Invalid=2165, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 17:56:26,860 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 503 mSDsluCounter, 2616 mSDsCounter, 0 mSdLazyCounter, 3298 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 3772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 3298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:26,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 1009 Invalid, 3772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 3298 Invalid, 0 Unknown, 374 Unchecked, 1.3s Time] [2022-03-01 17:56:26,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16921 states. [2022-03-01 17:56:27,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16921 to 16303. [2022-03-01 17:56:27,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16303 states, 16302 states have (on average 4.6696110906637225) internal successors, (76124), 16302 states have internal predecessors, (76124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:27,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16303 states to 16303 states and 76124 transitions. [2022-03-01 17:56:27,394 INFO L78 Accepts]: Start accepts. Automaton has 16303 states and 76124 transitions. Word has length 33 [2022-03-01 17:56:27,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:27,394 INFO L470 AbstractCegarLoop]: Abstraction has 16303 states and 76124 transitions. [2022-03-01 17:56:27,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:27,394 INFO L276 IsEmpty]: Start isEmpty. Operand 16303 states and 76124 transitions. [2022-03-01 17:56:27,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:56:27,429 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:27,429 INFO L514 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] [2022-03-01 17:56:27,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:27,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-03-01 17:56:27,645 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:27,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:27,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1889539959, now seen corresponding path program 93 times [2022-03-01 17:56:27,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:27,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35661462] [2022-03-01 17:56:27,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:27,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:27,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:27,791 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:27,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35661462] [2022-03-01 17:56:27,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35661462] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:27,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274651344] [2022-03-01 17:56:27,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:56:27,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:27,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:27,792 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:27,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-03-01 17:56:27,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:56:27,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:27,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:56:27,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:28,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:28,126 INFO L387 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 [2022-03-01 17:56:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:30,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:30,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:30,615 INFO L387 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 17 treesize of output 22 [2022-03-01 17:56:30,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:30,625 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:56:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:30,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274651344] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:30,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:30,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-01 17:56:30,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264120621] [2022-03-01 17:56:30,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:30,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:56:30,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:30,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:56:30,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=774, Unknown=1, NotChecked=0, Total=870 [2022-03-01 17:56:30,680 INFO L87 Difference]: Start difference. First operand 16303 states and 76124 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:31,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:31,867 INFO L93 Difference]: Finished difference Result 16888 states and 78327 transitions. [2022-03-01 17:56:31,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:56:31,868 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:56:31,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:31,933 INFO L225 Difference]: With dead ends: 16888 [2022-03-01 17:56:31,933 INFO L226 Difference]: Without dead ends: 16860 [2022-03-01 17:56:31,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=234, Invalid=1835, Unknown=1, NotChecked=0, Total=2070 [2022-03-01 17:56:31,934 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 406 mSDsluCounter, 1987 mSDsCounter, 0 mSdLazyCounter, 2602 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 2883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:31,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 808 Invalid, 2883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2602 Invalid, 0 Unknown, 235 Unchecked, 0.7s Time] [2022-03-01 17:56:31,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16860 states. [2022-03-01 17:56:32,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16860 to 16288. [2022-03-01 17:56:32,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16288 states, 16287 states have (on average 4.670043593049671) internal successors, (76061), 16287 states have internal predecessors, (76061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:32,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16288 states to 16288 states and 76061 transitions. [2022-03-01 17:56:32,504 INFO L78 Accepts]: Start accepts. Automaton has 16288 states and 76061 transitions. Word has length 33 [2022-03-01 17:56:32,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:32,505 INFO L470 AbstractCegarLoop]: Abstraction has 16288 states and 76061 transitions. [2022-03-01 17:56:32,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:32,505 INFO L276 IsEmpty]: Start isEmpty. Operand 16288 states and 76061 transitions. [2022-03-01 17:56:32,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:56:32,544 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:32,544 INFO L514 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] [2022-03-01 17:56:32,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-03-01 17:56:32,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-03-01 17:56:32,759 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:32,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:32,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1963210305, now seen corresponding path program 94 times [2022-03-01 17:56:32,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:32,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362367096] [2022-03-01 17:56:32,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:32,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:32,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:32,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:32,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362367096] [2022-03-01 17:56:32,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362367096] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:32,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309962667] [2022-03-01 17:56:32,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:56:32,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:32,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:32,970 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:32,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-03-01 17:56:33,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:56:33,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:33,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:56:33,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:33,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:33,410 INFO L387 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 37 treesize of output 21 [2022-03-01 17:56:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:33,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:33,698 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:56:33,698 INFO L387 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 27 treesize of output 48 [2022-03-01 17:56:33,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:33,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:33,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:33,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:33,744 INFO L387 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 27 treesize of output 7 [2022-03-01 17:56:33,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:33,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309962667] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:33,775 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:33,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 17:56:33,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342243525] [2022-03-01 17:56:33,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:33,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:56:33,775 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:33,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:56:33,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=970, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:56:33,776 INFO L87 Difference]: Start difference. First operand 16288 states and 76061 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:36,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:36,347 INFO L93 Difference]: Finished difference Result 17247 states and 79590 transitions. [2022-03-01 17:56:36,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-01 17:56:36,347 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:56:36,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:36,409 INFO L225 Difference]: With dead ends: 17247 [2022-03-01 17:56:36,409 INFO L226 Difference]: Without dead ends: 17104 [2022-03-01 17:56:36,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=375, Invalid=4455, Unknown=0, NotChecked=0, Total=4830 [2022-03-01 17:56:36,410 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 457 mSDsluCounter, 3243 mSDsCounter, 0 mSdLazyCounter, 4258 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 4325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 4258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:36,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 1341 Invalid, 4325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 4258 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-01 17:56:36,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17104 states. [2022-03-01 17:56:36,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17104 to 16294. [2022-03-01 17:56:36,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16294 states, 16293 states have (on average 4.669367212913521) internal successors, (76078), 16293 states have internal predecessors, (76078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16294 states to 16294 states and 76078 transitions. [2022-03-01 17:56:36,914 INFO L78 Accepts]: Start accepts. Automaton has 16294 states and 76078 transitions. Word has length 33 [2022-03-01 17:56:36,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:36,914 INFO L470 AbstractCegarLoop]: Abstraction has 16294 states and 76078 transitions. [2022-03-01 17:56:36,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:36,914 INFO L276 IsEmpty]: Start isEmpty. Operand 16294 states and 76078 transitions. [2022-03-01 17:56:36,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:56:36,952 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:36,952 INFO L514 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] [2022-03-01 17:56:36,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-03-01 17:56:37,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:37,168 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:37,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:37,168 INFO L85 PathProgramCache]: Analyzing trace with hash -186109133, now seen corresponding path program 95 times [2022-03-01 17:56:37,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:37,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238310721] [2022-03-01 17:56:37,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:37,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:37,349 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:37,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238310721] [2022-03-01 17:56:37,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238310721] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:37,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665085534] [2022-03-01 17:56:37,349 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:56:37,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:37,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:37,351 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:37,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-03-01 17:56:37,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:56:37,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:37,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:56:37,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:37,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:37,634 INFO L387 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 37 treesize of output 21 [2022-03-01 17:56:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:37,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:37,892 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:56:37,892 INFO L387 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 27 treesize of output 48 [2022-03-01 17:56:37,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:37,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:37,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:37,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:37,938 INFO L387 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 27 treesize of output 7 [2022-03-01 17:56:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:37,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665085534] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:37,969 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:37,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-03-01 17:56:37,970 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337234640] [2022-03-01 17:56:37,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:37,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:56:37,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:37,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:56:37,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:56:37,970 INFO L87 Difference]: Start difference. First operand 16294 states and 76078 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:39,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:39,752 INFO L93 Difference]: Finished difference Result 17444 states and 80518 transitions. [2022-03-01 17:56:39,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-01 17:56:39,753 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:56:39,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:39,823 INFO L225 Difference]: With dead ends: 17444 [2022-03-01 17:56:39,823 INFO L226 Difference]: Without dead ends: 17339 [2022-03-01 17:56:39,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=316, Invalid=3224, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 17:56:39,823 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 550 mSDsluCounter, 2796 mSDsCounter, 0 mSdLazyCounter, 3603 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 3674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 3603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:39,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 1114 Invalid, 3674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 3603 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-01 17:56:39,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17339 states. [2022-03-01 17:56:40,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17339 to 16250. [2022-03-01 17:56:40,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16250 states, 16249 states have (on average 4.669641208689765) internal successors, (75877), 16249 states have internal predecessors, (75877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:40,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16250 states to 16250 states and 75877 transitions. [2022-03-01 17:56:40,214 INFO L78 Accepts]: Start accepts. Automaton has 16250 states and 75877 transitions. Word has length 33 [2022-03-01 17:56:40,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:40,214 INFO L470 AbstractCegarLoop]: Abstraction has 16250 states and 75877 transitions. [2022-03-01 17:56:40,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:40,214 INFO L276 IsEmpty]: Start isEmpty. Operand 16250 states and 75877 transitions. [2022-03-01 17:56:40,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:56:40,250 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:40,250 INFO L514 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] [2022-03-01 17:56:40,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:40,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-03-01 17:56:40,459 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:40,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:40,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1517085983, now seen corresponding path program 96 times [2022-03-01 17:56:40,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:40,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460082227] [2022-03-01 17:56:40,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:40,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:40,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:40,642 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:40,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460082227] [2022-03-01 17:56:40,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460082227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:40,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027870962] [2022-03-01 17:56:40,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:56:40,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:40,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:40,643 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:40,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-03-01 17:56:40,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:56:40,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:40,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:56:40,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:41,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:41,027 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:56:41,027 INFO L387 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 55 [2022-03-01 17:56:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:41,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:41,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:41,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027870962] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:41,582 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:41,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-01 17:56:41,582 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600479036] [2022-03-01 17:56:41,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:41,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:56:41,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:41,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:56:41,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:56:41,583 INFO L87 Difference]: Start difference. First operand 16250 states and 75877 transitions. Second operand has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 32 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:46,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:46,228 INFO L93 Difference]: Finished difference Result 19660 states and 89347 transitions. [2022-03-01 17:56:46,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-01 17:56:46,228 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 32 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:56:46,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:46,293 INFO L225 Difference]: With dead ends: 19660 [2022-03-01 17:56:46,293 INFO L226 Difference]: Without dead ends: 19622 [2022-03-01 17:56:46,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2590 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=987, Invalid=7943, Unknown=0, NotChecked=0, Total=8930 [2022-03-01 17:56:46,294 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1188 mSDsluCounter, 4051 mSDsCounter, 0 mSdLazyCounter, 5578 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1188 SdHoareTripleChecker+Valid, 1637 SdHoareTripleChecker+Invalid, 5794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 5578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:46,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1188 Valid, 1637 Invalid, 5794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 5578 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-01 17:56:46,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19622 states. [2022-03-01 17:56:46,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19622 to 16466. [2022-03-01 17:56:46,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16466 states, 16465 states have (on average 4.677862131794716) internal successors, (77021), 16465 states have internal predecessors, (77021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:46,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16466 states to 16466 states and 77021 transitions. [2022-03-01 17:56:46,801 INFO L78 Accepts]: Start accepts. Automaton has 16466 states and 77021 transitions. Word has length 33 [2022-03-01 17:56:46,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:46,801 INFO L470 AbstractCegarLoop]: Abstraction has 16466 states and 77021 transitions. [2022-03-01 17:56:46,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 32 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:46,801 INFO L276 IsEmpty]: Start isEmpty. Operand 16466 states and 77021 transitions. [2022-03-01 17:56:46,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:56:46,839 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:46,839 INFO L514 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] [2022-03-01 17:56:46,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:47,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:47,055 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:47,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:47,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1474608707, now seen corresponding path program 97 times [2022-03-01 17:56:47,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:47,055 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392317225] [2022-03-01 17:56:47,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:47,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:47,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:47,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:47,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392317225] [2022-03-01 17:56:47,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392317225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:47,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11163259] [2022-03-01 17:56:47,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:56:47,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:47,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:47,233 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:47,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-03-01 17:56:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:47,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:56:47,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:47,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:47,502 INFO L387 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 37 treesize of output 21 [2022-03-01 17:56:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:47,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:47,753 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:56:47,753 INFO L387 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 27 treesize of output 48 [2022-03-01 17:56:47,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:47,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:56:47,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:47,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:47,791 INFO L387 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 27 treesize of output 7 [2022-03-01 17:56:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:47,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11163259] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:47,822 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:47,823 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-03-01 17:56:47,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585349499] [2022-03-01 17:56:47,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:47,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:56:47,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:47,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:56:47,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:56:47,823 INFO L87 Difference]: Start difference. First operand 16466 states and 77021 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:49,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:49,593 INFO L93 Difference]: Finished difference Result 18802 states and 86234 transitions. [2022-03-01 17:56:49,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 17:56:49,593 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:56:49,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:49,813 INFO L225 Difference]: With dead ends: 18802 [2022-03-01 17:56:49,813 INFO L226 Difference]: Without dead ends: 18773 [2022-03-01 17:56:49,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=360, Invalid=2946, Unknown=0, NotChecked=0, Total=3306 [2022-03-01 17:56:49,814 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 685 mSDsluCounter, 2960 mSDsCounter, 0 mSdLazyCounter, 3471 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 3936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 3471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 351 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:49,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 1274 Invalid, 3936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 3471 Invalid, 0 Unknown, 351 Unchecked, 1.1s Time] [2022-03-01 17:56:49,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18773 states. [2022-03-01 17:56:50,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18773 to 16847. [2022-03-01 17:56:50,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16847 states, 16846 states have (on average 4.678499347026) internal successors, (78814), 16846 states have internal predecessors, (78814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:50,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16847 states to 16847 states and 78814 transitions. [2022-03-01 17:56:50,274 INFO L78 Accepts]: Start accepts. Automaton has 16847 states and 78814 transitions. Word has length 33 [2022-03-01 17:56:50,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:50,275 INFO L470 AbstractCegarLoop]: Abstraction has 16847 states and 78814 transitions. [2022-03-01 17:56:50,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:50,275 INFO L276 IsEmpty]: Start isEmpty. Operand 16847 states and 78814 transitions. [2022-03-01 17:56:50,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:56:50,314 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:50,314 INFO L514 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] [2022-03-01 17:56:50,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:50,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2022-03-01 17:56:50,530 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:50,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:50,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1527995227, now seen corresponding path program 98 times [2022-03-01 17:56:50,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:50,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385224610] [2022-03-01 17:56:50,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:50,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:50,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:50,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:50,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385224610] [2022-03-01 17:56:50,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385224610] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:50,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383122990] [2022-03-01 17:56:50,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:56:50,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:50,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:50,719 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:50,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-03-01 17:56:50,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:56:50,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:50,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:56:50,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:51,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:51,095 INFO L387 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 [2022-03-01 17:56:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:51,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:51,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:51,746 INFO L387 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 17 treesize of output 22 [2022-03-01 17:56:51,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:51,757 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:56:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:51,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383122990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:51,808 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:51,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-01 17:56:51,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945793543] [2022-03-01 17:56:51,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:51,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:56:51,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:51,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:56:51,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:56:51,809 INFO L87 Difference]: Start difference. First operand 16847 states and 78814 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:53,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:53,457 INFO L93 Difference]: Finished difference Result 17471 states and 81218 transitions. [2022-03-01 17:56:53,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:56:53,457 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:56:53,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:53,520 INFO L225 Difference]: With dead ends: 17471 [2022-03-01 17:56:53,521 INFO L226 Difference]: Without dead ends: 17458 [2022-03-01 17:56:53,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=280, Invalid=1790, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:56:53,521 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 457 mSDsluCounter, 1896 mSDsCounter, 0 mSdLazyCounter, 2136 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 2636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 436 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:53,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 775 Invalid, 2636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2136 Invalid, 0 Unknown, 436 Unchecked, 0.9s Time] [2022-03-01 17:56:53,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17458 states. [2022-03-01 17:56:53,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17458 to 16865. [2022-03-01 17:56:53,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16865 states, 16864 states have (on average 4.6767670777988615) internal successors, (78869), 16864 states have internal predecessors, (78869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:54,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16865 states to 16865 states and 78869 transitions. [2022-03-01 17:56:54,118 INFO L78 Accepts]: Start accepts. Automaton has 16865 states and 78869 transitions. Word has length 33 [2022-03-01 17:56:54,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:54,118 INFO L470 AbstractCegarLoop]: Abstraction has 16865 states and 78869 transitions. [2022-03-01 17:56:54,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:54,118 INFO L276 IsEmpty]: Start isEmpty. Operand 16865 states and 78869 transitions. [2022-03-01 17:56:54,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:56:54,271 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:54,272 INFO L514 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] [2022-03-01 17:56:54,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:54,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2022-03-01 17:56:54,487 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:54,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:54,488 INFO L85 PathProgramCache]: Analyzing trace with hash 970020710, now seen corresponding path program 14 times [2022-03-01 17:56:54,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:54,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929177535] [2022-03-01 17:56:54,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:54,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:54,720 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:54,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929177535] [2022-03-01 17:56:54,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929177535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:54,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096742887] [2022-03-01 17:56:54,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:56:54,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:54,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:54,722 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:54,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-03-01 17:56:54,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:56:54,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:54,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:56:54,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:55,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:55,100 INFO L387 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 [2022-03-01 17:56:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:55,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:55,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:56:55,805 INFO L387 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 17 treesize of output 22 [2022-03-01 17:56:55,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:55,816 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:56:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:55,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096742887] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:55,869 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:55,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-01 17:56:55,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135521722] [2022-03-01 17:56:55,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:55,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 17:56:55,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:55,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 17:56:55,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:56:55,870 INFO L87 Difference]: Start difference. First operand 16865 states and 78869 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:57,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:56:57,399 INFO L93 Difference]: Finished difference Result 17530 states and 81382 transitions. [2022-03-01 17:56:57,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:56:57,400 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:56:57,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:56:57,483 INFO L225 Difference]: With dead ends: 17530 [2022-03-01 17:56:57,484 INFO L226 Difference]: Without dead ends: 17523 [2022-03-01 17:56:57,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=280, Invalid=1976, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:56:57,484 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 480 mSDsluCounter, 2309 mSDsCounter, 0 mSdLazyCounter, 2495 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 3270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 727 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:56:57,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 938 Invalid, 3270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2495 Invalid, 0 Unknown, 727 Unchecked, 0.9s Time] [2022-03-01 17:56:57,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17523 states. [2022-03-01 17:56:57,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17523 to 16876. [2022-03-01 17:56:57,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16876 states, 16875 states have (on average 4.675318518518519) internal successors, (78896), 16875 states have internal predecessors, (78896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:58,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16876 states to 16876 states and 78896 transitions. [2022-03-01 17:56:58,049 INFO L78 Accepts]: Start accepts. Automaton has 16876 states and 78896 transitions. Word has length 33 [2022-03-01 17:56:58,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:56:58,049 INFO L470 AbstractCegarLoop]: Abstraction has 16876 states and 78896 transitions. [2022-03-01 17:56:58,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:56:58,049 INFO L276 IsEmpty]: Start isEmpty. Operand 16876 states and 78896 transitions. [2022-03-01 17:56:58,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:56:58,090 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:56:58,090 INFO L514 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] [2022-03-01 17:56:58,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2022-03-01 17:56:58,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:58,302 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:56:58,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:56:58,303 INFO L85 PathProgramCache]: Analyzing trace with hash -192426458, now seen corresponding path program 15 times [2022-03-01 17:56:58,303 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:56:58,303 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139784444] [2022-03-01 17:56:58,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:56:58,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:56:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:56:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:58,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:56:58,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139784444] [2022-03-01 17:56:58,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139784444] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:56:58,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277856453] [2022-03-01 17:56:58,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:56:58,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:56:58,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:56:58,493 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:56:58,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-03-01 17:56:58,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:56:58,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:56:58,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 17:56:58,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:56:58,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:56:58,887 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-03-01 17:56:58,888 INFO L387 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 33 treesize of output 59 [2022-03-01 17:56:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:59,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:56:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:56:59,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277856453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:56:59,401 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:56:59,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 31 [2022-03-01 17:56:59,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636405895] [2022-03-01 17:56:59,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:56:59,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:56:59,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:56:59,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:56:59,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:56:59,402 INFO L87 Difference]: Start difference. First operand 16876 states and 78896 transitions. Second operand has 32 states, 32 states have (on average 2.5) internal successors, (80), 31 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:03,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:03,709 INFO L93 Difference]: Finished difference Result 19651 states and 89482 transitions. [2022-03-01 17:57:03,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-01 17:57:03,710 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.5) internal successors, (80), 31 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:57:03,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:03,782 INFO L225 Difference]: With dead ends: 19651 [2022-03-01 17:57:03,782 INFO L226 Difference]: Without dead ends: 19625 [2022-03-01 17:57:03,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2038 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=837, Invalid=6303, Unknown=0, NotChecked=0, Total=7140 [2022-03-01 17:57:03,783 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 1004 mSDsluCounter, 3918 mSDsCounter, 0 mSdLazyCounter, 5306 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 1607 SdHoareTripleChecker+Invalid, 5511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 5306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:03,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1004 Valid, 1607 Invalid, 5511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 5306 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-01 17:57:03,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19625 states. [2022-03-01 17:57:04,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19625 to 16876. [2022-03-01 17:57:04,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16876 states, 16875 states have (on average 4.677688888888889) internal successors, (78936), 16875 states have internal predecessors, (78936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:04,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16876 states to 16876 states and 78936 transitions. [2022-03-01 17:57:04,277 INFO L78 Accepts]: Start accepts. Automaton has 16876 states and 78936 transitions. Word has length 33 [2022-03-01 17:57:04,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:04,277 INFO L470 AbstractCegarLoop]: Abstraction has 16876 states and 78936 transitions. [2022-03-01 17:57:04,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.5) internal successors, (80), 31 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:04,277 INFO L276 IsEmpty]: Start isEmpty. Operand 16876 states and 78936 transitions. [2022-03-01 17:57:04,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:57:04,316 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:04,316 INFO L514 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] [2022-03-01 17:57:04,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:04,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:04,533 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:04,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:04,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1903053167, now seen corresponding path program 99 times [2022-03-01 17:57:04,533 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:04,533 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316512765] [2022-03-01 17:57:04,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:04,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:04,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:04,726 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:04,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316512765] [2022-03-01 17:57:04,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316512765] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:04,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474583840] [2022-03-01 17:57:04,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:57:04,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:04,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:04,737 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:04,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-03-01 17:57:04,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:57:04,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:04,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 17:57:04,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:05,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:05,138 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-03-01 17:57:05,138 INFO L387 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 33 treesize of output 59 [2022-03-01 17:57:05,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:05,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:05,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474583840] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:05,809 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:05,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-01 17:57:05,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460438405] [2022-03-01 17:57:05,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:05,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:57:05,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:05,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:57:05,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:57:05,810 INFO L87 Difference]: Start difference. First operand 16876 states and 78936 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:10,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:10,633 INFO L93 Difference]: Finished difference Result 19762 states and 90087 transitions. [2022-03-01 17:57:10,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-01 17:57:10,633 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:57:10,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:10,702 INFO L225 Difference]: With dead ends: 19762 [2022-03-01 17:57:10,702 INFO L226 Difference]: Without dead ends: 19713 [2022-03-01 17:57:10,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2435 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=833, Invalid=7539, Unknown=0, NotChecked=0, Total=8372 [2022-03-01 17:57:10,704 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 1127 mSDsluCounter, 4343 mSDsCounter, 0 mSdLazyCounter, 5892 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1127 SdHoareTripleChecker+Valid, 1797 SdHoareTripleChecker+Invalid, 6112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 5892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:10,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1127 Valid, 1797 Invalid, 6112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 5892 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-01 17:57:10,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19713 states. [2022-03-01 17:57:11,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19713 to 16775. [2022-03-01 17:57:11,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16775 states, 16774 states have (on average 4.678848217479432) internal successors, (78483), 16774 states have internal predecessors, (78483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:11,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16775 states to 16775 states and 78483 transitions. [2022-03-01 17:57:11,227 INFO L78 Accepts]: Start accepts. Automaton has 16775 states and 78483 transitions. Word has length 33 [2022-03-01 17:57:11,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:11,227 INFO L470 AbstractCegarLoop]: Abstraction has 16775 states and 78483 transitions. [2022-03-01 17:57:11,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:11,227 INFO L276 IsEmpty]: Start isEmpty. Operand 16775 states and 78483 transitions. [2022-03-01 17:57:11,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:57:11,264 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:11,264 INFO L514 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] [2022-03-01 17:57:11,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:11,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-03-01 17:57:11,470 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:11,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:11,470 INFO L85 PathProgramCache]: Analyzing trace with hash 534833869, now seen corresponding path program 100 times [2022-03-01 17:57:11,470 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:11,470 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837251225] [2022-03-01 17:57:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:11,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:11,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:11,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837251225] [2022-03-01 17:57:11,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837251225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:11,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623934371] [2022-03-01 17:57:11,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:57:11,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:11,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:11,675 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:11,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-03-01 17:57:11,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:57:11,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:11,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:57:11,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:12,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:12,063 INFO L387 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 [2022-03-01 17:57:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:12,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:12,411 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:57:12,411 INFO L387 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 27 treesize of output 48 [2022-03-01 17:57:12,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:12,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:12,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:12,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:12,454 INFO L387 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 27 treesize of output 7 [2022-03-01 17:57:12,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:12,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623934371] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:12,485 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:12,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 17:57:12,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366830562] [2022-03-01 17:57:12,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:12,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:57:12,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:12,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:57:12,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:57:12,486 INFO L87 Difference]: Start difference. First operand 16775 states and 78483 transitions. Second operand has 32 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:15,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:15,073 INFO L93 Difference]: Finished difference Result 18069 states and 83556 transitions. [2022-03-01 17:57:15,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-01 17:57:15,073 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:57:15,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:15,137 INFO L225 Difference]: With dead ends: 18069 [2022-03-01 17:57:15,138 INFO L226 Difference]: Without dead ends: 18033 [2022-03-01 17:57:15,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=457, Invalid=4235, Unknown=0, NotChecked=0, Total=4692 [2022-03-01 17:57:15,139 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 588 mSDsluCounter, 2999 mSDsCounter, 0 mSdLazyCounter, 4014 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 4143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 4014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:15,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 1278 Invalid, 4143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 4014 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-01 17:57:15,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18033 states. [2022-03-01 17:57:15,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18033 to 16775. [2022-03-01 17:57:15,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16775 states, 16774 states have (on average 4.678848217479432) internal successors, (78483), 16774 states have internal predecessors, (78483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:15,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16775 states to 16775 states and 78483 transitions. [2022-03-01 17:57:15,656 INFO L78 Accepts]: Start accepts. Automaton has 16775 states and 78483 transitions. Word has length 33 [2022-03-01 17:57:15,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:15,656 INFO L470 AbstractCegarLoop]: Abstraction has 16775 states and 78483 transitions. [2022-03-01 17:57:15,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:15,656 INFO L276 IsEmpty]: Start isEmpty. Operand 16775 states and 78483 transitions. [2022-03-01 17:57:15,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:57:15,698 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:15,698 INFO L514 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] [2022-03-01 17:57:15,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:15,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-03-01 17:57:15,914 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:15,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:15,915 INFO L85 PathProgramCache]: Analyzing trace with hash 181694379, now seen corresponding path program 101 times [2022-03-01 17:57:15,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:15,915 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154030550] [2022-03-01 17:57:15,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:15,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:16,049 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:16,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154030550] [2022-03-01 17:57:16,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154030550] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:16,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371428362] [2022-03-01 17:57:16,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:57:16,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:16,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:16,050 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:16,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-03-01 17:57:16,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:57:16,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:16,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 17:57:16,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:16,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:16,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:16,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:16,333 INFO L387 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 33 treesize of output 19 [2022-03-01 17:57:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:16,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:16,604 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:57:16,604 INFO L387 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 27 treesize of output 48 [2022-03-01 17:57:16,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:16,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:16,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:16,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:16,647 INFO L387 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 27 treesize of output 7 [2022-03-01 17:57:16,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:16,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371428362] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:16,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:16,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 32 [2022-03-01 17:57:16,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071072526] [2022-03-01 17:57:16,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:16,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:57:16,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:16,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:57:16,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:57:16,680 INFO L87 Difference]: Start difference. First operand 16775 states and 78483 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:19,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:19,674 INFO L93 Difference]: Finished difference Result 19190 states and 87841 transitions. [2022-03-01 17:57:19,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-01 17:57:19,674 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:57:19,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:19,742 INFO L225 Difference]: With dead ends: 19190 [2022-03-01 17:57:19,742 INFO L226 Difference]: Without dead ends: 19116 [2022-03-01 17:57:19,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1708 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=550, Invalid=5150, Unknown=0, NotChecked=0, Total=5700 [2022-03-01 17:57:19,743 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 750 mSDsluCounter, 3225 mSDsCounter, 0 mSdLazyCounter, 4400 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 4565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 4400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:19,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 1399 Invalid, 4565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 4400 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-01 17:57:19,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19116 states. [2022-03-01 17:57:20,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19116 to 16775. [2022-03-01 17:57:20,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16775 states, 16774 states have (on average 4.684571360438774) internal successors, (78579), 16774 states have internal predecessors, (78579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:20,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16775 states to 16775 states and 78579 transitions. [2022-03-01 17:57:20,225 INFO L78 Accepts]: Start accepts. Automaton has 16775 states and 78579 transitions. Word has length 33 [2022-03-01 17:57:20,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:20,225 INFO L470 AbstractCegarLoop]: Abstraction has 16775 states and 78579 transitions. [2022-03-01 17:57:20,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:20,226 INFO L276 IsEmpty]: Start isEmpty. Operand 16775 states and 78579 transitions. [2022-03-01 17:57:20,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:57:20,265 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:20,265 INFO L514 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] [2022-03-01 17:57:20,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:20,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-03-01 17:57:20,480 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:20,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:20,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1675540629, now seen corresponding path program 102 times [2022-03-01 17:57:20,481 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:20,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451082683] [2022-03-01 17:57:20,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:20,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:20,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:20,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451082683] [2022-03-01 17:57:20,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451082683] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:20,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793473653] [2022-03-01 17:57:20,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:57:20,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:20,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:20,667 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:20,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-03-01 17:57:20,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:57:20,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:20,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:57:20,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:20,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:20,998 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:57:20,998 INFO L387 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 33 treesize of output 57 [2022-03-01 17:57:21,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:21,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:21,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793473653] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:21,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:21,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 31 [2022-03-01 17:57:21,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981488846] [2022-03-01 17:57:21,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:21,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:57:21,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:21,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:57:21,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:57:21,455 INFO L87 Difference]: Start difference. First operand 16775 states and 78579 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:25,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:25,461 INFO L93 Difference]: Finished difference Result 19035 states and 87325 transitions. [2022-03-01 17:57:25,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-01 17:57:25,462 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:57:25,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:25,523 INFO L225 Difference]: With dead ends: 19035 [2022-03-01 17:57:25,523 INFO L226 Difference]: Without dead ends: 19007 [2022-03-01 17:57:25,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=749, Invalid=6733, Unknown=0, NotChecked=0, Total=7482 [2022-03-01 17:57:25,524 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 978 mSDsluCounter, 3609 mSDsCounter, 0 mSdLazyCounter, 4852 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 1515 SdHoareTripleChecker+Invalid, 5076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 4852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:25,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [978 Valid, 1515 Invalid, 5076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 4852 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-01 17:57:25,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19007 states. [2022-03-01 17:57:25,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19007 to 16766. [2022-03-01 17:57:25,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16766 states, 16765 states have (on average 4.684938860721742) internal successors, (78543), 16765 states have internal predecessors, (78543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:26,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16766 states to 16766 states and 78543 transitions. [2022-03-01 17:57:26,023 INFO L78 Accepts]: Start accepts. Automaton has 16766 states and 78543 transitions. Word has length 33 [2022-03-01 17:57:26,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:26,023 INFO L470 AbstractCegarLoop]: Abstraction has 16766 states and 78543 transitions. [2022-03-01 17:57:26,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:26,023 INFO L276 IsEmpty]: Start isEmpty. Operand 16766 states and 78543 transitions. [2022-03-01 17:57:26,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:57:26,060 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:26,060 INFO L514 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] [2022-03-01 17:57:26,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:26,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-03-01 17:57:26,275 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:26,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:26,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1684677661, now seen corresponding path program 103 times [2022-03-01 17:57:26,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:26,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486677239] [2022-03-01 17:57:26,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:26,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:26,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:26,436 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:26,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486677239] [2022-03-01 17:57:26,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486677239] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:26,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451176442] [2022-03-01 17:57:26,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:57:26,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:26,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:26,437 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:26,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-03-01 17:57:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:26,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:57:26,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:26,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:26,839 INFO L387 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 [2022-03-01 17:57:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:26,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:27,239 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:57:27,239 INFO L387 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 27 treesize of output 48 [2022-03-01 17:57:27,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:27,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:27,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:27,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:27,301 INFO L387 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 27 treesize of output 7 [2022-03-01 17:57:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:27,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451176442] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:27,363 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:27,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 17:57:27,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78423737] [2022-03-01 17:57:27,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:27,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:57:27,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:27,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:57:27,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:57:27,364 INFO L87 Difference]: Start difference. First operand 16766 states and 78543 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:30,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:30,518 INFO L93 Difference]: Finished difference Result 18071 states and 83467 transitions. [2022-03-01 17:57:30,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 17:57:30,518 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:57:30,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:30,581 INFO L225 Difference]: With dead ends: 18071 [2022-03-01 17:57:30,581 INFO L226 Difference]: Without dead ends: 18036 [2022-03-01 17:57:30,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=398, Invalid=4714, Unknown=0, NotChecked=0, Total=5112 [2022-03-01 17:57:30,582 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 517 mSDsluCounter, 3554 mSDsCounter, 0 mSdLazyCounter, 4589 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 4934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 4589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:30,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 1512 Invalid, 4934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 4589 Invalid, 0 Unknown, 268 Unchecked, 1.9s Time] [2022-03-01 17:57:30,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18036 states. [2022-03-01 17:57:31,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18036 to 16778. [2022-03-01 17:57:31,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16778 states, 16777 states have (on average 4.684508553376647) internal successors, (78592), 16777 states have internal predecessors, (78592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:31,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16778 states to 16778 states and 78592 transitions. [2022-03-01 17:57:31,106 INFO L78 Accepts]: Start accepts. Automaton has 16778 states and 78592 transitions. Word has length 33 [2022-03-01 17:57:31,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:31,106 INFO L470 AbstractCegarLoop]: Abstraction has 16778 states and 78592 transitions. [2022-03-01 17:57:31,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:31,106 INFO L276 IsEmpty]: Start isEmpty. Operand 16778 states and 78592 transitions. [2022-03-01 17:57:31,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:57:31,142 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:31,142 INFO L514 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] [2022-03-01 17:57:31,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:31,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2022-03-01 17:57:31,358 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:31,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:31,359 INFO L85 PathProgramCache]: Analyzing trace with hash 833944483, now seen corresponding path program 104 times [2022-03-01 17:57:31,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:31,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664445009] [2022-03-01 17:57:31,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:31,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:31,539 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:31,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664445009] [2022-03-01 17:57:31,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664445009] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:31,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500330378] [2022-03-01 17:57:31,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:57:31,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:31,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:31,540 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:31,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-03-01 17:57:31,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:57:31,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:31,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-01 17:57:31,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:31,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:31,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:31,938 INFO L387 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 [2022-03-01 17:57:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:32,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:32,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:57:32,534 INFO L387 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 17 treesize of output 22 [2022-03-01 17:57:32,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:32,543 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:57:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:32,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500330378] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:32,586 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:32,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-01 17:57:32,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697661150] [2022-03-01 17:57:32,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:32,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:57:32,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:32,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:57:32,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:57:32,587 INFO L87 Difference]: Start difference. First operand 16778 states and 78592 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:34,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:34,629 INFO L93 Difference]: Finished difference Result 17477 states and 81292 transitions. [2022-03-01 17:57:34,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 17:57:34,629 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:57:34,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:34,691 INFO L225 Difference]: With dead ends: 17477 [2022-03-01 17:57:34,691 INFO L226 Difference]: Without dead ends: 17465 [2022-03-01 17:57:34,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=329, Invalid=2863, Unknown=0, NotChecked=0, Total=3192 [2022-03-01 17:57:34,692 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 570 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 2383 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 2769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:34,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 867 Invalid, 2769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2383 Invalid, 0 Unknown, 277 Unchecked, 1.2s Time] [2022-03-01 17:57:34,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17465 states. [2022-03-01 17:57:35,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17465 to 16810. [2022-03-01 17:57:35,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16810 states, 16809 states have (on average 4.68314593372598) internal successors, (78719), 16809 states have internal predecessors, (78719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:35,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16810 states to 16810 states and 78719 transitions. [2022-03-01 17:57:35,116 INFO L78 Accepts]: Start accepts. Automaton has 16810 states and 78719 transitions. Word has length 33 [2022-03-01 17:57:35,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:35,116 INFO L470 AbstractCegarLoop]: Abstraction has 16810 states and 78719 transitions. [2022-03-01 17:57:35,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:35,116 INFO L276 IsEmpty]: Start isEmpty. Operand 16810 states and 78719 transitions. [2022-03-01 17:57:35,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:57:35,157 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:35,157 INFO L514 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] [2022-03-01 17:57:35,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:35,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:35,373 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:35,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:35,373 INFO L85 PathProgramCache]: Analyzing trace with hash 637430978, now seen corresponding path program 3 times [2022-03-01 17:57:35,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:35,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178256657] [2022-03-01 17:57:35,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:35,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:35,578 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:35,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178256657] [2022-03-01 17:57:35,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178256657] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:35,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188676047] [2022-03-01 17:57:35,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:57:35,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:35,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:35,579 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:35,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-03-01 17:57:35,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:57:35,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:35,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 17:57:35,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:36,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:36,088 INFO L353 Elim1Store]: treesize reduction 14, result has 74.5 percent of original size [2022-03-01 17:57:36,089 INFO L387 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 [2022-03-01 17:57:36,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:36,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:36,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188676047] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:36,540 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:36,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-03-01 17:57:36,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564321607] [2022-03-01 17:57:36,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:36,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 17:57:36,540 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:36,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 17:57:36,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:57:36,541 INFO L87 Difference]: Start difference. First operand 16810 states and 78719 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:41,320 INFO L93 Difference]: Finished difference Result 19887 states and 90051 transitions. [2022-03-01 17:57:41,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-01 17:57:41,321 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:57:41,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:41,384 INFO L225 Difference]: With dead ends: 19887 [2022-03-01 17:57:41,385 INFO L226 Difference]: Without dead ends: 19858 [2022-03-01 17:57:41,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3247 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1000, Invalid=9920, Unknown=0, NotChecked=0, Total=10920 [2022-03-01 17:57:41,385 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1111 mSDsluCounter, 3609 mSDsCounter, 0 mSdLazyCounter, 4855 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 5094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 4855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:41,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1111 Valid, 1555 Invalid, 5094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 4855 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-01 17:57:41,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19858 states. [2022-03-01 17:57:41,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19858 to 16910. [2022-03-01 17:57:41,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16910 states, 16909 states have (on average 4.685906913478029) internal successors, (79234), 16909 states have internal predecessors, (79234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:41,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16910 states to 16910 states and 79234 transitions. [2022-03-01 17:57:41,866 INFO L78 Accepts]: Start accepts. Automaton has 16910 states and 79234 transitions. Word has length 33 [2022-03-01 17:57:41,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:41,866 INFO L470 AbstractCegarLoop]: Abstraction has 16910 states and 79234 transitions. [2022-03-01 17:57:41,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:41,867 INFO L276 IsEmpty]: Start isEmpty. Operand 16910 states and 79234 transitions. [2022-03-01 17:57:41,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:57:41,904 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:41,904 INFO L514 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] [2022-03-01 17:57:41,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:42,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:42,120 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:42,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:42,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1300681963, now seen corresponding path program 105 times [2022-03-01 17:57:42,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:42,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271623864] [2022-03-01 17:57:42,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:42,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:42,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:42,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:42,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271623864] [2022-03-01 17:57:42,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271623864] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:42,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364329677] [2022-03-01 17:57:42,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:57:42,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:42,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:42,301 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:42,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-03-01 17:57:42,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:57:42,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:42,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 17:57:42,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:42,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:42,745 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:57:42,745 INFO L387 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 [2022-03-01 17:57:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:42,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:43,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:43,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364329677] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:43,279 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:43,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-03-01 17:57:43,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877867377] [2022-03-01 17:57:43,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:43,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-01 17:57:43,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:43,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-01 17:57:43,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:57:43,280 INFO L87 Difference]: Start difference. First operand 16910 states and 79234 transitions. Second operand has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:47,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:47,490 INFO L93 Difference]: Finished difference Result 18729 states and 85992 transitions. [2022-03-01 17:57:47,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-01 17:57:47,490 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:57:47,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:47,558 INFO L225 Difference]: With dead ends: 18729 [2022-03-01 17:57:47,558 INFO L226 Difference]: Without dead ends: 18699 [2022-03-01 17:57:47,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=660, Invalid=8270, Unknown=0, NotChecked=0, Total=8930 [2022-03-01 17:57:47,559 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 826 mSDsluCounter, 4638 mSDsCounter, 0 mSdLazyCounter, 6257 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1859 SdHoareTripleChecker+Invalid, 6432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 6257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:47,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 1859 Invalid, 6432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 6257 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-01 17:57:47,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18699 states. [2022-03-01 17:57:47,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18699 to 16910. [2022-03-01 17:57:47,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16910 states, 16909 states have (on average 4.685966053580933) internal successors, (79235), 16909 states have internal predecessors, (79235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:48,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16910 states to 16910 states and 79235 transitions. [2022-03-01 17:57:48,056 INFO L78 Accepts]: Start accepts. Automaton has 16910 states and 79235 transitions. Word has length 33 [2022-03-01 17:57:48,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:48,056 INFO L470 AbstractCegarLoop]: Abstraction has 16910 states and 79235 transitions. [2022-03-01 17:57:48,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:48,057 INFO L276 IsEmpty]: Start isEmpty. Operand 16910 states and 79235 transitions. [2022-03-01 17:57:48,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:57:48,094 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:48,094 INFO L514 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] [2022-03-01 17:57:48,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:48,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-03-01 17:57:48,307 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:48,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:48,308 INFO L85 PathProgramCache]: Analyzing trace with hash -382321509, now seen corresponding path program 106 times [2022-03-01 17:57:48,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:48,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523056402] [2022-03-01 17:57:48,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:48,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:48,435 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:48,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523056402] [2022-03-01 17:57:48,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523056402] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:48,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989865484] [2022-03-01 17:57:48,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:57:48,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:48,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:48,437 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:48,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-03-01 17:57:48,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:57:48,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:48,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:57:48,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:48,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:48,711 INFO L387 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 [2022-03-01 17:57:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:48,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:48,969 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:57:48,970 INFO L387 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 27 treesize of output 48 [2022-03-01 17:57:49,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:49,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:49,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:49,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:49,041 INFO L387 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 27 treesize of output 7 [2022-03-01 17:57:49,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:49,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989865484] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:49,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:49,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 17:57:49,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319602249] [2022-03-01 17:57:49,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:49,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:57:49,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:49,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:57:49,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:57:49,074 INFO L87 Difference]: Start difference. First operand 16910 states and 79235 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:51,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:51,759 INFO L93 Difference]: Finished difference Result 21206 states and 97010 transitions. [2022-03-01 17:57:51,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-01 17:57:51,759 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:57:51,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:51,839 INFO L225 Difference]: With dead ends: 21206 [2022-03-01 17:57:51,839 INFO L226 Difference]: Without dead ends: 21120 [2022-03-01 17:57:51,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=742, Invalid=5738, Unknown=0, NotChecked=0, Total=6480 [2022-03-01 17:57:51,840 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 811 mSDsluCounter, 3566 mSDsCounter, 0 mSdLazyCounter, 4854 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 4982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 4854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:51,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [811 Valid, 1512 Invalid, 4982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 4854 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-01 17:57:51,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21120 states. [2022-03-01 17:57:52,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21120 to 17505. [2022-03-01 17:57:52,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17505 states, 17504 states have (on average 4.713722577696527) internal successors, (82509), 17504 states have internal predecessors, (82509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:52,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17505 states to 17505 states and 82509 transitions. [2022-03-01 17:57:52,612 INFO L78 Accepts]: Start accepts. Automaton has 17505 states and 82509 transitions. Word has length 33 [2022-03-01 17:57:52,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:52,612 INFO L470 AbstractCegarLoop]: Abstraction has 17505 states and 82509 transitions. [2022-03-01 17:57:52,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:52,612 INFO L276 IsEmpty]: Start isEmpty. Operand 17505 states and 82509 transitions. [2022-03-01 17:57:52,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:57:52,652 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:52,652 INFO L514 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] [2022-03-01 17:57:52,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-03-01 17:57:52,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:52,856 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:52,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:52,857 INFO L85 PathProgramCache]: Analyzing trace with hash 920951097, now seen corresponding path program 107 times [2022-03-01 17:57:52,857 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:52,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539473240] [2022-03-01 17:57:52,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:52,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:53,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:53,076 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:53,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539473240] [2022-03-01 17:57:53,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539473240] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:53,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932415592] [2022-03-01 17:57:53,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:57:53,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:53,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:53,077 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:53,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-03-01 17:57:53,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:57:53,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:53,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:57:53,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:53,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:53,423 INFO L387 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 [2022-03-01 17:57:53,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:53,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:53,689 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:57:53,689 INFO L387 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 27 treesize of output 48 [2022-03-01 17:57:53,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:53,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:57:53,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:53,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:53,733 INFO L387 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 27 treesize of output 7 [2022-03-01 17:57:53,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:53,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932415592] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:53,764 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:53,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-03-01 17:57:53,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795142105] [2022-03-01 17:57:53,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:53,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:57:53,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:53,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:57:53,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:57:53,765 INFO L87 Difference]: Start difference. First operand 17505 states and 82509 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:56,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:57:56,168 INFO L93 Difference]: Finished difference Result 20890 states and 95605 transitions. [2022-03-01 17:57:56,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-01 17:57:56,169 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:57:56,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:57:56,245 INFO L225 Difference]: With dead ends: 20890 [2022-03-01 17:57:56,245 INFO L226 Difference]: Without dead ends: 20781 [2022-03-01 17:57:56,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=584, Invalid=4386, Unknown=0, NotChecked=0, Total=4970 [2022-03-01 17:57:56,246 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 735 mSDsluCounter, 2896 mSDsCounter, 0 mSdLazyCounter, 3817 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 3912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 3817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:57:56,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [735 Valid, 1250 Invalid, 3912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 3817 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-01 17:57:56,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20781 states. [2022-03-01 17:57:56,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20781 to 17514. [2022-03-01 17:57:56,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17514 states, 17513 states have (on average 4.713812596356992) internal successors, (82553), 17513 states have internal predecessors, (82553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:56,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17514 states to 17514 states and 82553 transitions. [2022-03-01 17:57:56,855 INFO L78 Accepts]: Start accepts. Automaton has 17514 states and 82553 transitions. Word has length 33 [2022-03-01 17:57:56,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:57:56,856 INFO L470 AbstractCegarLoop]: Abstraction has 17514 states and 82553 transitions. [2022-03-01 17:57:56,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:57:56,856 INFO L276 IsEmpty]: Start isEmpty. Operand 17514 states and 82553 transitions. [2022-03-01 17:57:56,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:57:56,899 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:57:56,899 INFO L514 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] [2022-03-01 17:57:56,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-03-01 17:57:57,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:57,118 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:57:57,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:57:57,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1364573623, now seen corresponding path program 108 times [2022-03-01 17:57:57,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:57:57,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597380160] [2022-03-01 17:57:57,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:57:57,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:57:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:57:57,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:57,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:57:57,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597380160] [2022-03-01 17:57:57,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597380160] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:57:57,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363213442] [2022-03-01 17:57:57,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:57:57,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:57:57,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:57:57,315 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:57:57,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-03-01 17:57:57,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:57:57,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:57:57,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:57:57,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:57:57,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:57:57,712 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:57:57,712 INFO L387 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 55 [2022-03-01 17:57:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:57,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:57:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:57:58,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363213442] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:57:58,304 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:57:58,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-01 17:57:58,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252851410] [2022-03-01 17:57:58,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:57:58,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:57:58,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:57:58,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:57:58,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:57:58,305 INFO L87 Difference]: Start difference. First operand 17514 states and 82553 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:03,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:03,707 INFO L93 Difference]: Finished difference Result 20733 states and 96159 transitions. [2022-03-01 17:58:03,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-01 17:58:03,708 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:58:03,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:03,781 INFO L225 Difference]: With dead ends: 20733 [2022-03-01 17:58:03,781 INFO L226 Difference]: Without dead ends: 20675 [2022-03-01 17:58:03,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2816 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=880, Invalid=9020, Unknown=0, NotChecked=0, Total=9900 [2022-03-01 17:58:03,782 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 1051 mSDsluCounter, 4399 mSDsCounter, 0 mSdLazyCounter, 5924 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1051 SdHoareTripleChecker+Valid, 1864 SdHoareTripleChecker+Invalid, 6154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 5924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:03,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1051 Valid, 1864 Invalid, 6154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 5924 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-01 17:58:03,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20675 states. [2022-03-01 17:58:04,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20675 to 17778. [2022-03-01 17:58:04,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17778 states, 17777 states have (on average 4.727850593463464) internal successors, (84047), 17777 states have internal predecessors, (84047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:04,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17778 states to 17778 states and 84047 transitions. [2022-03-01 17:58:04,420 INFO L78 Accepts]: Start accepts. Automaton has 17778 states and 84047 transitions. Word has length 33 [2022-03-01 17:58:04,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:04,420 INFO L470 AbstractCegarLoop]: Abstraction has 17778 states and 84047 transitions. [2022-03-01 17:58:04,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:04,420 INFO L276 IsEmpty]: Start isEmpty. Operand 17778 states and 84047 transitions. [2022-03-01 17:58:04,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:58:04,462 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:04,462 INFO L514 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] [2022-03-01 17:58:04,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2022-03-01 17:58:04,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:04,678 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:04,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:04,679 INFO L85 PathProgramCache]: Analyzing trace with hash 710882143, now seen corresponding path program 109 times [2022-03-01 17:58:04,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:04,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332420665] [2022-03-01 17:58:04,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:04,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:04,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:04,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:04,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332420665] [2022-03-01 17:58:04,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332420665] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:04,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876107621] [2022-03-01 17:58:04,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:58:04,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:04,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:04,868 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:04,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-03-01 17:58:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:04,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:58:04,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:05,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:05,347 INFO L387 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 [2022-03-01 17:58:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:05,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:05,767 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:58:05,767 INFO L387 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 27 treesize of output 48 [2022-03-01 17:58:05,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:05,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:05,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:05,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:05,841 INFO L387 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 27 treesize of output 7 [2022-03-01 17:58:05,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:05,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876107621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:05,894 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:05,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 17:58:05,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530600790] [2022-03-01 17:58:05,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:05,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:58:05,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:05,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:58:05,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=970, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:58:05,895 INFO L87 Difference]: Start difference. First operand 17778 states and 84047 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:09,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:09,579 INFO L93 Difference]: Finished difference Result 19986 states and 93007 transitions. [2022-03-01 17:58:09,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-01 17:58:09,580 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:58:09,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:09,661 INFO L225 Difference]: With dead ends: 19986 [2022-03-01 17:58:09,662 INFO L226 Difference]: Without dead ends: 19917 [2022-03-01 17:58:09,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=474, Invalid=5688, Unknown=0, NotChecked=0, Total=6162 [2022-03-01 17:58:09,662 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 545 mSDsluCounter, 4795 mSDsCounter, 0 mSdLazyCounter, 6511 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 2017 SdHoareTripleChecker+Invalid, 6608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 6511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:09,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 2017 Invalid, 6608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 6511 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-01 17:58:09,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19917 states. [2022-03-01 17:58:10,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19917 to 17834. [2022-03-01 17:58:10,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17834 states, 17833 states have (on average 4.734256715078787) internal successors, (84426), 17833 states have internal predecessors, (84426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:10,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17834 states to 17834 states and 84426 transitions. [2022-03-01 17:58:10,183 INFO L78 Accepts]: Start accepts. Automaton has 17834 states and 84426 transitions. Word has length 33 [2022-03-01 17:58:10,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:10,183 INFO L470 AbstractCegarLoop]: Abstraction has 17834 states and 84426 transitions. [2022-03-01 17:58:10,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:10,184 INFO L276 IsEmpty]: Start isEmpty. Operand 17834 states and 84426 transitions. [2022-03-01 17:58:10,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:58:10,363 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:10,364 INFO L514 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] [2022-03-01 17:58:10,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:10,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-03-01 17:58:10,567 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:10,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:10,568 INFO L85 PathProgramCache]: Analyzing trace with hash -464058405, now seen corresponding path program 110 times [2022-03-01 17:58:10,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:10,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195819811] [2022-03-01 17:58:10,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:10,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:10,759 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:10,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195819811] [2022-03-01 17:58:10,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195819811] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:10,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450642352] [2022-03-01 17:58:10,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:58:10,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:10,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:10,761 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:10,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-03-01 17:58:10,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:58:10,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:10,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:58:10,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:10,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:10,982 INFO L387 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 33 treesize of output 49 [2022-03-01 17:58:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:11,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:11,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:11,814 INFO L387 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 17 treesize of output 22 [2022-03-01 17:58:11,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:11,830 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:58:11,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:11,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450642352] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:11,874 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:11,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-01 17:58:11,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872781434] [2022-03-01 17:58:11,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:11,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:58:11,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:11,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:58:11,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:58:11,875 INFO L87 Difference]: Start difference. First operand 17834 states and 84426 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:13,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:13,722 INFO L93 Difference]: Finished difference Result 18880 states and 88760 transitions. [2022-03-01 17:58:13,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-01 17:58:13,722 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:58:13,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:13,786 INFO L225 Difference]: With dead ends: 18880 [2022-03-01 17:58:13,786 INFO L226 Difference]: Without dead ends: 18873 [2022-03-01 17:58:13,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=393, Invalid=2469, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 17:58:13,787 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 510 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 2789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 437 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:13,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 790 Invalid, 2789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2228 Invalid, 0 Unknown, 437 Unchecked, 1.0s Time] [2022-03-01 17:58:13,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18873 states. [2022-03-01 17:58:14,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18873 to 17919. [2022-03-01 17:58:14,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17919 states, 17918 states have (on average 4.732671057037615) internal successors, (84800), 17918 states have internal predecessors, (84800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:14,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17919 states to 17919 states and 84800 transitions. [2022-03-01 17:58:14,335 INFO L78 Accepts]: Start accepts. Automaton has 17919 states and 84800 transitions. Word has length 33 [2022-03-01 17:58:14,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:14,335 INFO L470 AbstractCegarLoop]: Abstraction has 17919 states and 84800 transitions. [2022-03-01 17:58:14,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:14,335 INFO L276 IsEmpty]: Start isEmpty. Operand 17919 states and 84800 transitions. [2022-03-01 17:58:14,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:58:14,377 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:14,377 INFO L514 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] [2022-03-01 17:58:14,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-03-01 17:58:14,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2022-03-01 17:58:14,593 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:14,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:14,594 INFO L85 PathProgramCache]: Analyzing trace with hash 902108661, now seen corresponding path program 111 times [2022-03-01 17:58:14,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:14,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49829063] [2022-03-01 17:58:14,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:14,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:14,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:14,792 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:14,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49829063] [2022-03-01 17:58:14,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49829063] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:14,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805084316] [2022-03-01 17:58:14,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:58:14,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:14,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:14,793 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:14,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-03-01 17:58:14,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:58:14,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:14,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 17:58:14,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:15,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:15,124 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:58:15,124 INFO L387 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 33 treesize of output 57 [2022-03-01 17:58:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:15,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:15,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805084316] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:15,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:15,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-01 17:58:15,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99426561] [2022-03-01 17:58:15,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:15,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:58:15,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:15,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:58:15,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:58:15,749 INFO L87 Difference]: Start difference. First operand 17919 states and 84800 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:21,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:21,070 INFO L93 Difference]: Finished difference Result 22258 states and 102848 transitions. [2022-03-01 17:58:21,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-01 17:58:21,070 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:58:21,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:21,153 INFO L225 Difference]: With dead ends: 22258 [2022-03-01 17:58:21,153 INFO L226 Difference]: Without dead ends: 22188 [2022-03-01 17:58:21,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2710 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1041, Invalid=8271, Unknown=0, NotChecked=0, Total=9312 [2022-03-01 17:58:21,154 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1104 mSDsluCounter, 3734 mSDsCounter, 0 mSdLazyCounter, 5163 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1104 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 5411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 5163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:21,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1104 Valid, 1523 Invalid, 5411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 5163 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-01 17:58:21,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22188 states. [2022-03-01 17:58:21,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22188 to 18428. [2022-03-01 17:58:21,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18428 states, 18427 states have (on average 4.755521788679655) internal successors, (87630), 18427 states have internal predecessors, (87630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:21,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18428 states to 18428 states and 87630 transitions. [2022-03-01 17:58:21,842 INFO L78 Accepts]: Start accepts. Automaton has 18428 states and 87630 transitions. Word has length 33 [2022-03-01 17:58:21,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:21,842 INFO L470 AbstractCegarLoop]: Abstraction has 18428 states and 87630 transitions. [2022-03-01 17:58:21,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:21,843 INFO L276 IsEmpty]: Start isEmpty. Operand 18428 states and 87630 transitions. [2022-03-01 17:58:21,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:58:21,886 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:21,886 INFO L514 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] [2022-03-01 17:58:21,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:22,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-03-01 17:58:22,099 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:22,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:22,100 INFO L85 PathProgramCache]: Analyzing trace with hash 839214201, now seen corresponding path program 112 times [2022-03-01 17:58:22,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:22,100 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025919184] [2022-03-01 17:58:22,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:22,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:22,318 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:22,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025919184] [2022-03-01 17:58:22,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025919184] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:22,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875383478] [2022-03-01 17:58:22,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:58:22,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:22,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:22,319 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:22,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-03-01 17:58:22,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:58:22,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:22,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:58:22,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:22,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:22,631 INFO L387 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 37 treesize of output 21 [2022-03-01 17:58:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:22,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:22,989 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:58:22,989 INFO L387 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 27 treesize of output 48 [2022-03-01 17:58:23,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:23,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:23,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:23,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:23,036 INFO L387 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 27 treesize of output 7 [2022-03-01 17:58:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:23,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875383478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:23,080 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:23,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 17:58:23,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375303910] [2022-03-01 17:58:23,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:23,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:58:23,080 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:23,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:58:23,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:58:23,081 INFO L87 Difference]: Start difference. First operand 18428 states and 87630 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:25,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:25,885 INFO L93 Difference]: Finished difference Result 21691 states and 100577 transitions. [2022-03-01 17:58:25,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-01 17:58:25,886 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:58:25,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:25,969 INFO L225 Difference]: With dead ends: 21691 [2022-03-01 17:58:25,969 INFO L226 Difference]: Without dead ends: 21601 [2022-03-01 17:58:25,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=589, Invalid=4241, Unknown=0, NotChecked=0, Total=4830 [2022-03-01 17:58:25,969 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 756 mSDsluCounter, 3488 mSDsCounter, 0 mSdLazyCounter, 4566 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 1490 SdHoareTripleChecker+Invalid, 4698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 4566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:25,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 1490 Invalid, 4698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 4566 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-01 17:58:25,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21601 states. [2022-03-01 17:58:26,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21601 to 18843. [2022-03-01 17:58:26,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18843 states, 18842 states have (on average 4.760375756289141) internal successors, (89695), 18842 states have internal predecessors, (89695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:26,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18843 states to 18843 states and 89695 transitions. [2022-03-01 17:58:26,490 INFO L78 Accepts]: Start accepts. Automaton has 18843 states and 89695 transitions. Word has length 33 [2022-03-01 17:58:26,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:26,490 INFO L470 AbstractCegarLoop]: Abstraction has 18843 states and 89695 transitions. [2022-03-01 17:58:26,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:26,490 INFO L276 IsEmpty]: Start isEmpty. Operand 18843 states and 89695 transitions. [2022-03-01 17:58:26,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:58:26,532 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:26,533 INFO L514 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] [2022-03-01 17:58:26,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2022-03-01 17:58:26,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-03-01 17:58:26,748 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:26,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:26,748 INFO L85 PathProgramCache]: Analyzing trace with hash 785827681, now seen corresponding path program 113 times [2022-03-01 17:58:26,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:26,749 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780907596] [2022-03-01 17:58:26,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:26,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:26,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:26,935 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:26,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780907596] [2022-03-01 17:58:26,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780907596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:26,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592472432] [2022-03-01 17:58:26,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:58:26,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:26,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:26,937 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:26,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-03-01 17:58:26,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:58:26,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:26,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-01 17:58:26,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:27,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:27,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:27,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:27,258 INFO L387 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 35 treesize of output 21 [2022-03-01 17:58:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:27,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:27,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:27,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:27,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:27,703 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:27,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 48 [2022-03-01 17:58:27,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:27,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:27,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:27,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:27,720 INFO L387 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 27 treesize of output 7 [2022-03-01 17:58:27,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:27,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592472432] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:27,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:27,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-03-01 17:58:27,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491846556] [2022-03-01 17:58:27,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:27,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:58:27,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:27,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:58:27,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:58:27,768 INFO L87 Difference]: Start difference. First operand 18843 states and 89695 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:32,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:32,113 INFO L93 Difference]: Finished difference Result 23929 states and 110222 transitions. [2022-03-01 17:58:32,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-01 17:58:32,114 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:58:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:32,206 INFO L225 Difference]: With dead ends: 23929 [2022-03-01 17:58:32,206 INFO L226 Difference]: Without dead ends: 23916 [2022-03-01 17:58:32,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3617 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1480, Invalid=9232, Unknown=0, NotChecked=0, Total=10712 [2022-03-01 17:58:32,207 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 1022 mSDsluCounter, 4445 mSDsCounter, 0 mSdLazyCounter, 5420 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 1915 SdHoareTripleChecker+Invalid, 6647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 5420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 940 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:32,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 1915 Invalid, 6647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 5420 Invalid, 0 Unknown, 940 Unchecked, 1.9s Time] [2022-03-01 17:58:32,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23916 states. [2022-03-01 17:58:32,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23916 to 19280. [2022-03-01 17:58:32,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19280 states, 19279 states have (on average 4.756678250946626) internal successors, (91704), 19279 states have internal predecessors, (91704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:32,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19280 states to 19280 states and 91704 transitions. [2022-03-01 17:58:32,762 INFO L78 Accepts]: Start accepts. Automaton has 19280 states and 91704 transitions. Word has length 33 [2022-03-01 17:58:32,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:32,763 INFO L470 AbstractCegarLoop]: Abstraction has 19280 states and 91704 transitions. [2022-03-01 17:58:32,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:32,763 INFO L276 IsEmpty]: Start isEmpty. Operand 19280 states and 91704 transitions. [2022-03-01 17:58:32,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:58:32,806 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:32,806 INFO L514 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] [2022-03-01 17:58:32,822 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-03-01 17:58:33,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:33,019 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:33,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:33,020 INFO L85 PathProgramCache]: Analyzing trace with hash -376619487, now seen corresponding path program 114 times [2022-03-01 17:58:33,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:33,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488051980] [2022-03-01 17:58:33,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:33,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:33,218 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:33,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488051980] [2022-03-01 17:58:33,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488051980] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:33,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630666614] [2022-03-01 17:58:33,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:58:33,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:33,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:33,220 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:33,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-03-01 17:58:33,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:58:33,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:33,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:58:33,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:33,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:33,512 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:58:33,513 INFO L387 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 33 treesize of output 57 [2022-03-01 17:58:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:33,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:34,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630666614] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:34,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:34,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 31 [2022-03-01 17:58:34,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338240935] [2022-03-01 17:58:34,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:34,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:58:34,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:34,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:58:34,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:58:34,016 INFO L87 Difference]: Start difference. First operand 19280 states and 91704 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:38,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:38,795 INFO L93 Difference]: Finished difference Result 22563 states and 104578 transitions. [2022-03-01 17:58:38,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-01 17:58:38,795 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:58:38,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:38,882 INFO L225 Difference]: With dead ends: 22563 [2022-03-01 17:58:38,882 INFO L226 Difference]: Without dead ends: 22483 [2022-03-01 17:58:38,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2619 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1108, Invalid=7822, Unknown=0, NotChecked=0, Total=8930 [2022-03-01 17:58:38,883 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1072 mSDsluCounter, 3887 mSDsCounter, 0 mSdLazyCounter, 5226 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 5530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 5226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:38,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1072 Valid, 1653 Invalid, 5530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 5226 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-01 17:58:38,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22483 states. [2022-03-01 17:58:39,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22483 to 19163. [2022-03-01 17:58:39,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19163 states, 19162 states have (on average 4.757697526354243) internal successors, (91167), 19162 states have internal predecessors, (91167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:39,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19163 states to 19163 states and 91167 transitions. [2022-03-01 17:58:39,675 INFO L78 Accepts]: Start accepts. Automaton has 19163 states and 91167 transitions. Word has length 33 [2022-03-01 17:58:39,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:39,675 INFO L470 AbstractCegarLoop]: Abstraction has 19163 states and 91167 transitions. [2022-03-01 17:58:39,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:39,675 INFO L276 IsEmpty]: Start isEmpty. Operand 19163 states and 91167 transitions. [2022-03-01 17:58:39,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:58:39,725 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:39,725 INFO L514 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] [2022-03-01 17:58:39,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:39,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2022-03-01 17:58:39,941 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:39,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:39,941 INFO L85 PathProgramCache]: Analyzing trace with hash 55173915, now seen corresponding path program 115 times [2022-03-01 17:58:39,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:39,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270479898] [2022-03-01 17:58:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:39,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:40,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:40,149 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:40,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270479898] [2022-03-01 17:58:40,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270479898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:40,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108375785] [2022-03-01 17:58:40,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:58:40,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:40,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:40,150 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:40,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-03-01 17:58:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:40,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:58:40,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:40,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:40,446 INFO L387 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 [2022-03-01 17:58:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:40,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:40,890 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:58:40,891 INFO L387 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 27 treesize of output 48 [2022-03-01 17:58:40,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:40,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:40,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:40,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:40,963 INFO L387 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 27 treesize of output 7 [2022-03-01 17:58:41,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:41,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108375785] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:41,017 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:41,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 17:58:41,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279590159] [2022-03-01 17:58:41,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:41,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:58:41,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:41,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:58:41,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:58:41,018 INFO L87 Difference]: Start difference. First operand 19163 states and 91167 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:44,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:44,018 INFO L93 Difference]: Finished difference Result 20991 states and 98389 transitions. [2022-03-01 17:58:44,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-01 17:58:44,018 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:58:44,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:44,084 INFO L225 Difference]: With dead ends: 20991 [2022-03-01 17:58:44,084 INFO L226 Difference]: Without dead ends: 20979 [2022-03-01 17:58:44,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=489, Invalid=4481, Unknown=0, NotChecked=0, Total=4970 [2022-03-01 17:58:44,086 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 588 mSDsluCounter, 3038 mSDsCounter, 0 mSdLazyCounter, 3877 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 4217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 3877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:44,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 1335 Invalid, 4217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 3877 Invalid, 0 Unknown, 207 Unchecked, 1.6s Time] [2022-03-01 17:58:44,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20979 states. [2022-03-01 17:58:44,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20979 to 19312. [2022-03-01 17:58:44,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19312 states, 19311 states have (on average 4.750763813370618) internal successors, (91742), 19311 states have internal predecessors, (91742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:44,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19312 states to 19312 states and 91742 transitions. [2022-03-01 17:58:44,681 INFO L78 Accepts]: Start accepts. Automaton has 19312 states and 91742 transitions. Word has length 33 [2022-03-01 17:58:44,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:44,682 INFO L470 AbstractCegarLoop]: Abstraction has 19312 states and 91742 transitions. [2022-03-01 17:58:44,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:44,682 INFO L276 IsEmpty]: Start isEmpty. Operand 19312 states and 91742 transitions. [2022-03-01 17:58:44,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:58:44,725 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:44,725 INFO L514 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] [2022-03-01 17:58:44,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:44,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2022-03-01 17:58:44,940 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:44,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:44,941 INFO L85 PathProgramCache]: Analyzing trace with hash -2063118535, now seen corresponding path program 116 times [2022-03-01 17:58:44,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:44,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793657720] [2022-03-01 17:58:44,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:44,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:45,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:45,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793657720] [2022-03-01 17:58:45,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793657720] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:45,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243194451] [2022-03-01 17:58:45,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:58:45,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:45,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:45,141 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:45,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-03-01 17:58:45,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:58:45,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:45,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:58:45,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:45,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:45,473 INFO L387 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 33 treesize of output 49 [2022-03-01 17:58:46,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:46,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:46,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:46,289 INFO L387 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 17 treesize of output 22 [2022-03-01 17:58:46,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:46,310 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:58:46,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:46,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243194451] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:46,343 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:46,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-01 17:58:46,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287147379] [2022-03-01 17:58:46,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:46,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:58:46,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:46,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:58:46,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:58:46,344 INFO L87 Difference]: Start difference. First operand 19312 states and 91742 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:48,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:48,989 INFO L93 Difference]: Finished difference Result 20328 states and 96004 transitions. [2022-03-01 17:58:48,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-01 17:58:48,989 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:58:48,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:49,066 INFO L225 Difference]: With dead ends: 20328 [2022-03-01 17:58:49,067 INFO L226 Difference]: Without dead ends: 20317 [2022-03-01 17:58:49,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 44 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=517, Invalid=3773, Unknown=0, NotChecked=0, Total=4290 [2022-03-01 17:58:49,067 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 464 mSDsluCounter, 2355 mSDsCounter, 0 mSdLazyCounter, 2867 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 3214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:49,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 1028 Invalid, 3214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2867 Invalid, 0 Unknown, 230 Unchecked, 1.1s Time] [2022-03-01 17:58:49,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20317 states. [2022-03-01 17:58:49,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20317 to 19337. [2022-03-01 17:58:49,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19337 states, 19336 states have (on average 4.748810508895325) internal successors, (91823), 19336 states have internal predecessors, (91823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:49,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19337 states to 19337 states and 91823 transitions. [2022-03-01 17:58:49,558 INFO L78 Accepts]: Start accepts. Automaton has 19337 states and 91823 transitions. Word has length 33 [2022-03-01 17:58:49,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:49,558 INFO L470 AbstractCegarLoop]: Abstraction has 19337 states and 91823 transitions. [2022-03-01 17:58:49,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:49,558 INFO L276 IsEmpty]: Start isEmpty. Operand 19337 states and 91823 transitions. [2022-03-01 17:58:49,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:58:49,599 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:49,599 INFO L514 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] [2022-03-01 17:58:49,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:49,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:49,815 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:49,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:49,815 INFO L85 PathProgramCache]: Analyzing trace with hash -320308200, now seen corresponding path program 16 times [2022-03-01 17:58:49,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:49,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926914882] [2022-03-01 17:58:49,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:49,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:50,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:50,025 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:50,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926914882] [2022-03-01 17:58:50,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926914882] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:50,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702929029] [2022-03-01 17:58:50,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:58:50,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:50,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:50,026 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:50,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-03-01 17:58:50,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:58:50,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:50,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:58:50,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:50,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:50,337 INFO L387 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 37 treesize of output 21 [2022-03-01 17:58:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:50,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:50,715 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:58:50,716 INFO L387 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 27 treesize of output 48 [2022-03-01 17:58:50,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:50,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:58:50,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:50,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:50,768 INFO L387 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 27 treesize of output 7 [2022-03-01 17:58:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:50,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702929029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:50,809 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:50,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 17:58:50,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803853896] [2022-03-01 17:58:50,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:50,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:58:50,809 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:50,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:58:50,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:58:50,809 INFO L87 Difference]: Start difference. First operand 19337 states and 91823 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:54,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:54,255 INFO L93 Difference]: Finished difference Result 21020 states and 98464 transitions. [2022-03-01 17:58:54,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-01 17:58:54,255 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:58:54,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:54,334 INFO L225 Difference]: With dead ends: 21020 [2022-03-01 17:58:54,334 INFO L226 Difference]: Without dead ends: 20923 [2022-03-01 17:58:54,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=495, Invalid=4617, Unknown=0, NotChecked=0, Total=5112 [2022-03-01 17:58:54,335 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 567 mSDsluCounter, 3606 mSDsCounter, 0 mSdLazyCounter, 4851 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 1559 SdHoareTripleChecker+Invalid, 4979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 4851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:54,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 1559 Invalid, 4979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 4851 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-01 17:58:54,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20923 states. [2022-03-01 17:58:54,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20923 to 19241. [2022-03-01 17:58:54,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19241 states, 19240 states have (on average 4.757068607068607) internal successors, (91526), 19240 states have internal predecessors, (91526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:54,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19241 states to 19241 states and 91526 transitions. [2022-03-01 17:58:54,840 INFO L78 Accepts]: Start accepts. Automaton has 19241 states and 91526 transitions. Word has length 33 [2022-03-01 17:58:54,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:54,840 INFO L470 AbstractCegarLoop]: Abstraction has 19241 states and 91526 transitions. [2022-03-01 17:58:54,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:54,841 INFO L276 IsEmpty]: Start isEmpty. Operand 19241 states and 91526 transitions. [2022-03-01 17:58:54,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:58:54,971 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:54,971 INFO L514 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] [2022-03-01 17:58:54,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-03-01 17:58:55,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:55,172 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:55,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:55,172 INFO L85 PathProgramCache]: Analyzing trace with hash -508423509, now seen corresponding path program 117 times [2022-03-01 17:58:55,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:55,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199599234] [2022-03-01 17:58:55,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:55,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:55,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:55,373 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:55,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199599234] [2022-03-01 17:58:55,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199599234] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:55,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785924937] [2022-03-01 17:58:55,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:58:55,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:55,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:55,374 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:55,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-03-01 17:58:55,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:58:55,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:55,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:58:55,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:55,700 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:55,700 INFO L387 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 33 treesize of output 49 [2022-03-01 17:58:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:56,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:58:56,675 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:58:56,675 INFO L387 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 17 treesize of output 22 [2022-03-01 17:58:56,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:56,685 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:58:56,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:56,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785924937] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:58:56,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:58:56,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-01 17:58:56,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545407110] [2022-03-01 17:58:56,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:58:56,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:58:56,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:58:56,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:58:56,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:58:56,737 INFO L87 Difference]: Start difference. First operand 19241 states and 91526 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:58,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:58:58,467 INFO L93 Difference]: Finished difference Result 19870 states and 93984 transitions. [2022-03-01 17:58:58,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:58:58,467 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:58:58,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:58:58,544 INFO L225 Difference]: With dead ends: 19870 [2022-03-01 17:58:58,544 INFO L226 Difference]: Without dead ends: 19859 [2022-03-01 17:58:58,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=321, Invalid=2435, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:58:58,545 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 463 mSDsluCounter, 2118 mSDsCounter, 0 mSdLazyCounter, 2368 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 2897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 460 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:58:58,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 856 Invalid, 2897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2368 Invalid, 0 Unknown, 460 Unchecked, 0.9s Time] [2022-03-01 17:58:58,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19859 states. [2022-03-01 17:58:59,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19859 to 19257. [2022-03-01 17:58:59,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19257 states, 19256 states have (on average 4.755972164520149) internal successors, (91581), 19256 states have internal predecessors, (91581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:59,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19257 states to 19257 states and 91581 transitions. [2022-03-01 17:58:59,147 INFO L78 Accepts]: Start accepts. Automaton has 19257 states and 91581 transitions. Word has length 33 [2022-03-01 17:58:59,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:58:59,147 INFO L470 AbstractCegarLoop]: Abstraction has 19257 states and 91581 transitions. [2022-03-01 17:58:59,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:58:59,147 INFO L276 IsEmpty]: Start isEmpty. Operand 19257 states and 91581 transitions. [2022-03-01 17:58:59,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:58:59,195 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:58:59,195 INFO L514 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] [2022-03-01 17:58:59,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2022-03-01 17:58:59,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:59,411 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:58:59,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:58:59,412 INFO L85 PathProgramCache]: Analyzing trace with hash 379080172, now seen corresponding path program 17 times [2022-03-01 17:58:59,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:58:59,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258396841] [2022-03-01 17:58:59,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:58:59,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:58:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:58:59,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:58:59,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:58:59,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258396841] [2022-03-01 17:58:59,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258396841] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:58:59,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147551350] [2022-03-01 17:58:59,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:58:59,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:58:59,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:58:59,595 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:58:59,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-03-01 17:58:59,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:58:59,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:58:59,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:58:59,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:58:59,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:58:59,960 INFO L387 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 37 treesize of output 21 [2022-03-01 17:59:00,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:00,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:00,407 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:59:00,407 INFO L387 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 27 treesize of output 48 [2022-03-01 17:59:00,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:00,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:00,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:00,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:00,473 INFO L387 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 27 treesize of output 7 [2022-03-01 17:59:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:00,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147551350] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:00,510 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:00,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 17:59:00,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051907197] [2022-03-01 17:59:00,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:00,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:59:00,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:00,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:59:00,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:59:00,511 INFO L87 Difference]: Start difference. First operand 19257 states and 91581 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:02,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:02,940 INFO L93 Difference]: Finished difference Result 21990 states and 102172 transitions. [2022-03-01 17:59:02,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-01 17:59:02,941 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:59:02,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:03,018 INFO L225 Difference]: With dead ends: 21990 [2022-03-01 17:59:03,018 INFO L226 Difference]: Without dead ends: 21866 [2022-03-01 17:59:03,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=618, Invalid=5234, Unknown=0, NotChecked=0, Total=5852 [2022-03-01 17:59:03,019 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 785 mSDsluCounter, 3450 mSDsCounter, 0 mSdLazyCounter, 4205 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 1486 SdHoareTripleChecker+Invalid, 4741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 4205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 391 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:03,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 1486 Invalid, 4741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 4205 Invalid, 0 Unknown, 391 Unchecked, 1.3s Time] [2022-03-01 17:59:03,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21866 states. [2022-03-01 17:59:03,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21866 to 19015. [2022-03-01 17:59:03,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19015 states, 19014 states have (on average 4.761333754075944) internal successors, (90532), 19014 states have internal predecessors, (90532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:03,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19015 states to 19015 states and 90532 transitions. [2022-03-01 17:59:03,644 INFO L78 Accepts]: Start accepts. Automaton has 19015 states and 90532 transitions. Word has length 33 [2022-03-01 17:59:03,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:03,644 INFO L470 AbstractCegarLoop]: Abstraction has 19015 states and 90532 transitions. [2022-03-01 17:59:03,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:03,644 INFO L276 IsEmpty]: Start isEmpty. Operand 19015 states and 90532 transitions. [2022-03-01 17:59:03,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:59:03,690 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:03,690 INFO L514 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] [2022-03-01 17:59:03,706 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2022-03-01 17:59:03,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:03,906 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:03,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:03,907 INFO L85 PathProgramCache]: Analyzing trace with hash -945888303, now seen corresponding path program 118 times [2022-03-01 17:59:03,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:03,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704533032] [2022-03-01 17:59:03,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:03,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:04,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:04,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704533032] [2022-03-01 17:59:04,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704533032] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:04,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885707074] [2022-03-01 17:59:04,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:59:04,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:04,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:04,030 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:04,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-03-01 17:59:04,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:59:04,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:04,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:59:04,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:04,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:04,280 INFO L387 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 37 treesize of output 21 [2022-03-01 17:59:04,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:04,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:04,718 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:59:04,718 INFO L387 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 27 treesize of output 48 [2022-03-01 17:59:04,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:04,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:04,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:04,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:04,788 INFO L387 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 27 treesize of output 7 [2022-03-01 17:59:04,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:04,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885707074] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:04,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:04,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 17:59:04,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662360686] [2022-03-01 17:59:04,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:04,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:59:04,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:04,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:59:04,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:59:04,842 INFO L87 Difference]: Start difference. First operand 19015 states and 90532 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:08,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:08,178 INFO L93 Difference]: Finished difference Result 21715 states and 101365 transitions. [2022-03-01 17:59:08,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-01 17:59:08,178 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:59:08,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:08,259 INFO L225 Difference]: With dead ends: 21715 [2022-03-01 17:59:08,259 INFO L226 Difference]: Without dead ends: 21653 [2022-03-01 17:59:08,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2028 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=685, Invalid=5957, Unknown=0, NotChecked=0, Total=6642 [2022-03-01 17:59:08,260 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 661 mSDsluCounter, 3430 mSDsCounter, 0 mSdLazyCounter, 4553 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 1486 SdHoareTripleChecker+Invalid, 5017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 4553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 337 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:08,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 1486 Invalid, 5017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 4553 Invalid, 0 Unknown, 337 Unchecked, 2.0s Time] [2022-03-01 17:59:08,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21653 states. [2022-03-01 17:59:08,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21653 to 19385. [2022-03-01 17:59:08,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19385 states, 19384 states have (on average 4.758666941807676) internal successors, (92242), 19384 states have internal predecessors, (92242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:08,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19385 states to 19385 states and 92242 transitions. [2022-03-01 17:59:08,970 INFO L78 Accepts]: Start accepts. Automaton has 19385 states and 92242 transitions. Word has length 33 [2022-03-01 17:59:08,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:08,970 INFO L470 AbstractCegarLoop]: Abstraction has 19385 states and 92242 transitions. [2022-03-01 17:59:08,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:08,970 INFO L276 IsEmpty]: Start isEmpty. Operand 19385 states and 92242 transitions. [2022-03-01 17:59:09,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:59:09,014 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:09,014 INFO L514 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] [2022-03-01 17:59:09,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-03-01 17:59:09,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:09,222 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:09,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:09,222 INFO L85 PathProgramCache]: Analyzing trace with hash 420278763, now seen corresponding path program 119 times [2022-03-01 17:59:09,222 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:09,222 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688309304] [2022-03-01 17:59:09,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:09,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:09,406 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:09,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688309304] [2022-03-01 17:59:09,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688309304] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:09,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111151439] [2022-03-01 17:59:09,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:59:09,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:09,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:09,407 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:09,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-03-01 17:59:09,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:59:09,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:09,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:59:09,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:09,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:09,789 INFO L387 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 37 treesize of output 21 [2022-03-01 17:59:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:09,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:10,138 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:59:10,138 INFO L387 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 27 treesize of output 48 [2022-03-01 17:59:10,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:10,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:10,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:10,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:10,189 INFO L387 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 27 treesize of output 7 [2022-03-01 17:59:10,223 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:10,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111151439] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:10,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:10,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 17:59:10,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554270027] [2022-03-01 17:59:10,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:10,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:59:10,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:10,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:59:10,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:59:10,224 INFO L87 Difference]: Start difference. First operand 19385 states and 92242 transitions. Second operand has 32 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:12,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:12,676 INFO L93 Difference]: Finished difference Result 21591 states and 101078 transitions. [2022-03-01 17:59:12,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-01 17:59:12,676 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:59:12,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:12,746 INFO L225 Difference]: With dead ends: 21591 [2022-03-01 17:59:12,746 INFO L226 Difference]: Without dead ends: 21576 [2022-03-01 17:59:12,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=646, Invalid=5360, Unknown=0, NotChecked=0, Total=6006 [2022-03-01 17:59:12,747 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 649 mSDsluCounter, 2998 mSDsCounter, 0 mSdLazyCounter, 4066 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 1320 SdHoareTripleChecker+Invalid, 4349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 4066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:12,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 1320 Invalid, 4349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 4066 Invalid, 0 Unknown, 168 Unchecked, 1.3s Time] [2022-03-01 17:59:12,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21576 states. [2022-03-01 17:59:13,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21576 to 19385. [2022-03-01 17:59:13,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19385 states, 19384 states have (on average 4.758563763929014) internal successors, (92240), 19384 states have internal predecessors, (92240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:13,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19385 states to 19385 states and 92240 transitions. [2022-03-01 17:59:13,215 INFO L78 Accepts]: Start accepts. Automaton has 19385 states and 92240 transitions. Word has length 33 [2022-03-01 17:59:13,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:13,215 INFO L470 AbstractCegarLoop]: Abstraction has 19385 states and 92240 transitions. [2022-03-01 17:59:13,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.53125) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:13,215 INFO L276 IsEmpty]: Start isEmpty. Operand 19385 states and 92240 transitions. [2022-03-01 17:59:13,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:59:13,257 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:13,257 INFO L514 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] [2022-03-01 17:59:13,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2022-03-01 17:59:13,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:13,471 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:13,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:13,471 INFO L85 PathProgramCache]: Analyzing trace with hash -2131878198, now seen corresponding path program 18 times [2022-03-01 17:59:13,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:13,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184972014] [2022-03-01 17:59:13,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:13,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:13,664 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:13,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184972014] [2022-03-01 17:59:13,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184972014] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:13,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105825820] [2022-03-01 17:59:13,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:59:13,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:13,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:13,665 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:13,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-03-01 17:59:13,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:59:13,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:13,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:59:13,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:13,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:13,967 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-03-01 17:59:13,967 INFO L387 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 33 treesize of output 59 [2022-03-01 17:59:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:14,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:14,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:59:14,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105825820] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:14,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:14,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-03-01 17:59:14,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320068174] [2022-03-01 17:59:14,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:14,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:59:14,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:14,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:59:14,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:59:14,526 INFO L87 Difference]: Start difference. First operand 19385 states and 92240 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:18,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:18,984 INFO L93 Difference]: Finished difference Result 23518 states and 108687 transitions. [2022-03-01 17:59:18,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-01 17:59:18,984 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:59:18,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:19,071 INFO L225 Difference]: With dead ends: 23518 [2022-03-01 17:59:19,071 INFO L226 Difference]: Without dead ends: 23432 [2022-03-01 17:59:19,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2823 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=970, Invalid=8342, Unknown=0, NotChecked=0, Total=9312 [2022-03-01 17:59:19,072 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 1159 mSDsluCounter, 4187 mSDsCounter, 0 mSdLazyCounter, 5605 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1159 SdHoareTripleChecker+Valid, 1761 SdHoareTripleChecker+Invalid, 5808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 5605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:19,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1159 Valid, 1761 Invalid, 5808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 5605 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-01 17:59:19,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23432 states. [2022-03-01 17:59:19,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23432 to 19539. [2022-03-01 17:59:19,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19539 states, 19538 states have (on average 4.768400040945849) internal successors, (93165), 19538 states have internal predecessors, (93165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:19,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19539 states to 19539 states and 93165 transitions. [2022-03-01 17:59:19,743 INFO L78 Accepts]: Start accepts. Automaton has 19539 states and 93165 transitions. Word has length 33 [2022-03-01 17:59:19,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:19,744 INFO L470 AbstractCegarLoop]: Abstraction has 19539 states and 93165 transitions. [2022-03-01 17:59:19,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:19,744 INFO L276 IsEmpty]: Start isEmpty. Operand 19539 states and 93165 transitions. [2022-03-01 17:59:19,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:59:19,791 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:19,792 INFO L514 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] [2022-03-01 17:59:19,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2022-03-01 17:59:19,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-03-01 17:59:19,995 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:19,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:19,996 INFO L85 PathProgramCache]: Analyzing trace with hash 357384303, now seen corresponding path program 120 times [2022-03-01 17:59:19,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:19,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221302759] [2022-03-01 17:59:19,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:19,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:20,167 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:20,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221302759] [2022-03-01 17:59:20,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221302759] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:20,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944988157] [2022-03-01 17:59:20,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:59:20,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:20,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:20,168 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:20,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-03-01 17:59:20,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:59:20,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:20,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:59:20,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:20,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:20,561 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:59:20,562 INFO L387 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 33 treesize of output 57 [2022-03-01 17:59:20,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:20,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:59:21,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944988157] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:21,087 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:21,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 30 [2022-03-01 17:59:21,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009067702] [2022-03-01 17:59:21,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:21,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:59:21,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:21,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:59:21,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:59:21,088 INFO L87 Difference]: Start difference. First operand 19539 states and 93165 transitions. Second operand has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 30 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:24,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:24,809 INFO L93 Difference]: Finished difference Result 22700 states and 105207 transitions. [2022-03-01 17:59:24,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-01 17:59:24,809 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 30 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:59:24,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:24,891 INFO L225 Difference]: With dead ends: 22700 [2022-03-01 17:59:24,892 INFO L226 Difference]: Without dead ends: 22633 [2022-03-01 17:59:24,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2339 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=920, Invalid=7090, Unknown=0, NotChecked=0, Total=8010 [2022-03-01 17:59:24,892 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 1057 mSDsluCounter, 3518 mSDsCounter, 0 mSdLazyCounter, 4662 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 1515 SdHoareTripleChecker+Invalid, 4880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 4662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:24,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 1515 Invalid, 4880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 4662 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-01 17:59:24,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22633 states. [2022-03-01 17:59:25,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22633 to 19591. [2022-03-01 17:59:25,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19591 states, 19590 states have (on average 4.763297600816744) internal successors, (93313), 19590 states have internal predecessors, (93313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:25,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19591 states to 19591 states and 93313 transitions. [2022-03-01 17:59:25,470 INFO L78 Accepts]: Start accepts. Automaton has 19591 states and 93313 transitions. Word has length 33 [2022-03-01 17:59:25,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:25,470 INFO L470 AbstractCegarLoop]: Abstraction has 19591 states and 93313 transitions. [2022-03-01 17:59:25,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 30 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:25,470 INFO L276 IsEmpty]: Start isEmpty. Operand 19591 states and 93313 transitions. [2022-03-01 17:59:25,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:59:25,513 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:25,513 INFO L514 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] [2022-03-01 17:59:25,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:25,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-03-01 17:59:25,729 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:25,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:25,729 INFO L85 PathProgramCache]: Analyzing trace with hash -541977769, now seen corresponding path program 121 times [2022-03-01 17:59:25,729 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:25,729 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188271851] [2022-03-01 17:59:25,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:25,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:26,134 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:26,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188271851] [2022-03-01 17:59:26,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188271851] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:26,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818344239] [2022-03-01 17:59:26,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:59:26,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:26,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:26,135 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:26,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-03-01 17:59:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:26,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:59:26,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:26,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:26,496 INFO L387 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 37 treesize of output 21 [2022-03-01 17:59:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:26,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:26,901 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:59:26,902 INFO L387 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 27 treesize of output 48 [2022-03-01 17:59:26,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:26,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:26,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:26,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:26,957 INFO L387 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 27 treesize of output 7 [2022-03-01 17:59:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:27,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818344239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:27,009 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:27,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 17:59:27,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060759495] [2022-03-01 17:59:27,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:27,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:59:27,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:27,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:59:27,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:59:27,010 INFO L87 Difference]: Start difference. First operand 19591 states and 93313 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:32,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:32,583 INFO L93 Difference]: Finished difference Result 24270 states and 110482 transitions. [2022-03-01 17:59:32,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-03-01 17:59:32,584 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:59:32,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:32,675 INFO L225 Difference]: With dead ends: 24270 [2022-03-01 17:59:32,675 INFO L226 Difference]: Without dead ends: 24206 [2022-03-01 17:59:32,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5083 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1605, Invalid=12675, Unknown=0, NotChecked=0, Total=14280 [2022-03-01 17:59:32,676 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 1200 mSDsluCounter, 4401 mSDsCounter, 0 mSdLazyCounter, 5277 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 5913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 5277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 414 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:32,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1200 Valid, 1845 Invalid, 5913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 5277 Invalid, 0 Unknown, 414 Unchecked, 2.3s Time] [2022-03-01 17:59:32,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24206 states. [2022-03-01 17:59:33,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24206 to 19929. [2022-03-01 17:59:33,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19929 states, 19928 states have (on average 4.760839020473705) internal successors, (94874), 19928 states have internal predecessors, (94874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:33,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19929 states to 19929 states and 94874 transitions. [2022-03-01 17:59:33,447 INFO L78 Accepts]: Start accepts. Automaton has 19929 states and 94874 transitions. Word has length 33 [2022-03-01 17:59:33,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:33,447 INFO L470 AbstractCegarLoop]: Abstraction has 19929 states and 94874 transitions. [2022-03-01 17:59:33,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:33,448 INFO L276 IsEmpty]: Start isEmpty. Operand 19929 states and 94874 transitions. [2022-03-01 17:59:33,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:59:33,493 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:33,493 INFO L514 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] [2022-03-01 17:59:33,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-03-01 17:59:33,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2022-03-01 17:59:33,695 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:33,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:33,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1972391225, now seen corresponding path program 122 times [2022-03-01 17:59:33,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:33,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104138004] [2022-03-01 17:59:33,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:33,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:33,918 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:33,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104138004] [2022-03-01 17:59:33,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104138004] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:33,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916257843] [2022-03-01 17:59:33,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:59:33,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:33,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:33,920 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:33,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-03-01 17:59:33,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:59:33,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:33,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:59:33,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:34,196 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:34,197 INFO L387 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 33 treesize of output 49 [2022-03-01 17:59:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:34,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:34,920 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:59:34,921 INFO L387 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 17 treesize of output 22 [2022-03-01 17:59:34,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:34,927 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 17:59:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:34,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916257843] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:34,958 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:34,958 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-03-01 17:59:34,959 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392950164] [2022-03-01 17:59:34,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:34,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 17:59:34,959 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:34,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 17:59:34,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=967, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:59:34,959 INFO L87 Difference]: Start difference. First operand 19929 states and 94874 transitions. Second operand has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:38,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:38,832 INFO L93 Difference]: Finished difference Result 22889 states and 105042 transitions. [2022-03-01 17:59:38,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-01 17:59:38,832 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:59:38,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:38,919 INFO L225 Difference]: With dead ends: 22889 [2022-03-01 17:59:38,919 INFO L226 Difference]: Without dead ends: 22871 [2022-03-01 17:59:38,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2918 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1188, Invalid=7742, Unknown=0, NotChecked=0, Total=8930 [2022-03-01 17:59:38,919 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 1048 mSDsluCounter, 4519 mSDsCounter, 0 mSdLazyCounter, 5511 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1048 SdHoareTripleChecker+Valid, 1929 SdHoareTripleChecker+Invalid, 6403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 5511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 690 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:38,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1048 Valid, 1929 Invalid, 6403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 5511 Invalid, 0 Unknown, 690 Unchecked, 1.8s Time] [2022-03-01 17:59:38,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22871 states. [2022-03-01 17:59:39,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22871 to 19989. [2022-03-01 17:59:39,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19989 states, 19988 states have (on average 4.762007204322593) internal successors, (95183), 19988 states have internal predecessors, (95183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:39,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19989 states to 19989 states and 95183 transitions. [2022-03-01 17:59:39,568 INFO L78 Accepts]: Start accepts. Automaton has 19989 states and 95183 transitions. Word has length 33 [2022-03-01 17:59:39,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:39,568 INFO L470 AbstractCegarLoop]: Abstraction has 19989 states and 95183 transitions. [2022-03-01 17:59:39,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:39,569 INFO L276 IsEmpty]: Start isEmpty. Operand 19989 states and 95183 transitions. [2022-03-01 17:59:39,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:59:39,623 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:39,623 INFO L514 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] [2022-03-01 17:59:39,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:39,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:39,838 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:39,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:39,839 INFO L85 PathProgramCache]: Analyzing trace with hash 303997783, now seen corresponding path program 123 times [2022-03-01 17:59:39,839 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:39,839 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815563046] [2022-03-01 17:59:39,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:39,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:40,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:40,179 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:40,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815563046] [2022-03-01 17:59:40,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815563046] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:40,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816569871] [2022-03-01 17:59:40,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:59:40,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:40,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:40,181 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:40,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-03-01 17:59:40,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:59:40,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:40,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 17:59:40,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:40,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:40,544 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:59:40,544 INFO L387 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 [2022-03-01 17:59:40,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:40,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:59:41,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816569871] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:41,197 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:41,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 33 [2022-03-01 17:59:41,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727002024] [2022-03-01 17:59:41,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:41,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 17:59:41,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:41,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 17:59:41,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:59:41,198 INFO L87 Difference]: Start difference. First operand 19989 states and 95183 transitions. Second operand has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:45,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:45,375 INFO L93 Difference]: Finished difference Result 23894 states and 108649 transitions. [2022-03-01 17:59:45,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-01 17:59:45,376 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:59:45,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:45,457 INFO L225 Difference]: With dead ends: 23894 [2022-03-01 17:59:45,457 INFO L226 Difference]: Without dead ends: 23856 [2022-03-01 17:59:45,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2501 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1096, Invalid=6736, Unknown=0, NotChecked=0, Total=7832 [2022-03-01 17:59:45,458 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1377 mSDsluCounter, 3630 mSDsCounter, 0 mSdLazyCounter, 4487 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1377 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 4736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 4487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:45,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1377 Valid, 1503 Invalid, 4736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 4487 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-01 17:59:45,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23856 states. [2022-03-01 17:59:45,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23856 to 19903. [2022-03-01 17:59:45,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19903 states, 19902 states have (on average 4.760928549894483) internal successors, (94752), 19902 states have internal predecessors, (94752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:46,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19903 states to 19903 states and 94752 transitions. [2022-03-01 17:59:46,136 INFO L78 Accepts]: Start accepts. Automaton has 19903 states and 94752 transitions. Word has length 33 [2022-03-01 17:59:46,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:46,136 INFO L470 AbstractCegarLoop]: Abstraction has 19903 states and 94752 transitions. [2022-03-01 17:59:46,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:46,136 INFO L276 IsEmpty]: Start isEmpty. Operand 19903 states and 94752 transitions. [2022-03-01 17:59:46,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:59:46,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:46,186 INFO L514 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] [2022-03-01 17:59:46,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:46,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2022-03-01 17:59:46,399 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:46,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:46,400 INFO L85 PathProgramCache]: Analyzing trace with hash -71060157, now seen corresponding path program 124 times [2022-03-01 17:59:46,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:46,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745567791] [2022-03-01 17:59:46,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:46,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:46,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:46,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745567791] [2022-03-01 17:59:46,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745567791] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:46,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425300736] [2022-03-01 17:59:46,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:59:46,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:46,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:46,582 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:46,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-03-01 17:59:46,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:59:46,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:46,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:59:46,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:46,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:46,819 INFO L387 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 37 treesize of output 21 [2022-03-01 17:59:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:46,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:47,078 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:59:47,078 INFO L387 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 27 treesize of output 48 [2022-03-01 17:59:47,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:47,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:47,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:47,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:47,120 INFO L387 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 27 treesize of output 7 [2022-03-01 17:59:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:47,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425300736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:47,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:47,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 17:59:47,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187248017] [2022-03-01 17:59:47,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:47,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:59:47,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:47,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:59:47,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:59:47,152 INFO L87 Difference]: Start difference. First operand 19903 states and 94752 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:51,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:51,340 INFO L93 Difference]: Finished difference Result 24130 states and 110129 transitions. [2022-03-01 17:59:51,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-01 17:59:51,340 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:59:51,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:51,421 INFO L225 Difference]: With dead ends: 24130 [2022-03-01 17:59:51,421 INFO L226 Difference]: Without dead ends: 23909 [2022-03-01 17:59:51,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3323 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1162, Invalid=8540, Unknown=0, NotChecked=0, Total=9702 [2022-03-01 17:59:51,422 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 1226 mSDsluCounter, 3742 mSDsCounter, 0 mSdLazyCounter, 4713 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1226 SdHoareTripleChecker+Valid, 1495 SdHoareTripleChecker+Invalid, 4937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 4713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:51,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1226 Valid, 1495 Invalid, 4937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 4713 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-01 17:59:51,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23909 states. [2022-03-01 17:59:52,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23909 to 19687. [2022-03-01 17:59:52,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19687 states, 19686 states have (on average 4.763994717057807) internal successors, (93784), 19686 states have internal predecessors, (93784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:52,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19687 states to 19687 states and 93784 transitions. [2022-03-01 17:59:52,144 INFO L78 Accepts]: Start accepts. Automaton has 19687 states and 93784 transitions. Word has length 33 [2022-03-01 17:59:52,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:52,144 INFO L470 AbstractCegarLoop]: Abstraction has 19687 states and 93784 transitions. [2022-03-01 17:59:52,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:52,144 INFO L276 IsEmpty]: Start isEmpty. Operand 19687 states and 93784 transitions. [2022-03-01 17:59:52,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:59:52,323 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:52,323 INFO L514 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] [2022-03-01 17:59:52,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:52,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2022-03-01 17:59:52,539 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:52,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:52,539 INFO L85 PathProgramCache]: Analyzing trace with hash -426655983, now seen corresponding path program 125 times [2022-03-01 17:59:52,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:52,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789028155] [2022-03-01 17:59:52,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:52,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:52,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:52,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:52,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789028155] [2022-03-01 17:59:52,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789028155] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:52,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634436161] [2022-03-01 17:59:52,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:59:52,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:52,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:52,754 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:52,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-03-01 17:59:52,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:59:52,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:52,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:59:52,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:53,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:53,070 INFO L387 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 37 treesize of output 21 [2022-03-01 17:59:53,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:53,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:53,435 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 17:59:53,435 INFO L387 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 27 treesize of output 48 [2022-03-01 17:59:53,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:53,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:59:53,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:53,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:53,505 INFO L387 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 27 treesize of output 7 [2022-03-01 17:59:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:53,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634436161] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:53,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:53,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 17:59:53,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894107459] [2022-03-01 17:59:53,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:53,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 17:59:53,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:53,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 17:59:53,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:59:53,557 INFO L87 Difference]: Start difference. First operand 19687 states and 93784 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:56,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:59:56,713 INFO L93 Difference]: Finished difference Result 21557 states and 101175 transitions. [2022-03-01 17:59:56,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-01 17:59:56,713 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 17:59:56,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:59:56,796 INFO L225 Difference]: With dead ends: 21557 [2022-03-01 17:59:56,796 INFO L226 Difference]: Without dead ends: 21383 [2022-03-01 17:59:56,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=496, Invalid=5054, Unknown=0, NotChecked=0, Total=5550 [2022-03-01 17:59:56,796 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 671 mSDsluCounter, 3265 mSDsCounter, 0 mSdLazyCounter, 4398 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 4528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 4398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:59:56,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 1340 Invalid, 4528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 4398 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-01 17:59:56,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21383 states. [2022-03-01 17:59:57,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21383 to 19682. [2022-03-01 17:59:57,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19682 states, 19681 states have (on average 4.772216858899446) internal successors, (93922), 19681 states have internal predecessors, (93922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:57,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19682 states to 19682 states and 93922 transitions. [2022-03-01 17:59:57,313 INFO L78 Accepts]: Start accepts. Automaton has 19682 states and 93922 transitions. Word has length 33 [2022-03-01 17:59:57,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:59:57,313 INFO L470 AbstractCegarLoop]: Abstraction has 19682 states and 93922 transitions. [2022-03-01 17:59:57,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:59:57,313 INFO L276 IsEmpty]: Start isEmpty. Operand 19682 states and 93922 transitions. [2022-03-01 17:59:57,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:59:57,360 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:59:57,360 INFO L514 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] [2022-03-01 17:59:57,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2022-03-01 17:59:57,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:57,575 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 17:59:57,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:59:57,575 INFO L85 PathProgramCache]: Analyzing trace with hash -670572553, now seen corresponding path program 126 times [2022-03-01 17:59:57,575 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:59:57,575 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411365195] [2022-03-01 17:59:57,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:59:57,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:59:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:59:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:57,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:59:57,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411365195] [2022-03-01 17:59:57,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411365195] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:59:57,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276456691] [2022-03-01 17:59:57,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:59:57,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:59:57,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:59:57,864 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:59:57,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-03-01 17:59:57,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:59:57,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:59:57,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:59:57,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:59:58,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:59:58,371 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 17:59:58,371 INFO L387 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 35 treesize of output 59 [2022-03-01 17:59:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:58,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:59:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:59:58,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276456691] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:59:58,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:59:58,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-01 17:59:58,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410766620] [2022-03-01 17:59:58,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:59:58,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:59:58,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:59:58,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:59:58,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:59:58,925 INFO L87 Difference]: Start difference. First operand 19682 states and 93922 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:03,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:03,991 INFO L93 Difference]: Finished difference Result 23350 states and 108122 transitions. [2022-03-01 18:00:03,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-01 18:00:03,991 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:00:03,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:04,077 INFO L225 Difference]: With dead ends: 23350 [2022-03-01 18:00:04,077 INFO L226 Difference]: Without dead ends: 23242 [2022-03-01 18:00:04,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3810 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=980, Invalid=11902, Unknown=0, NotChecked=0, Total=12882 [2022-03-01 18:00:04,078 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 1155 mSDsluCounter, 4617 mSDsCounter, 0 mSdLazyCounter, 6035 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1155 SdHoareTripleChecker+Valid, 1876 SdHoareTripleChecker+Invalid, 6265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 6035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:04,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1155 Valid, 1876 Invalid, 6265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 6035 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-01 18:00:04,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23242 states. [2022-03-01 18:00:04,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23242 to 19868. [2022-03-01 18:00:04,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19868 states, 19867 states have (on average 4.778980218452711) internal successors, (94944), 19867 states have internal predecessors, (94944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:04,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19868 states to 19868 states and 94944 transitions. [2022-03-01 18:00:04,719 INFO L78 Accepts]: Start accepts. Automaton has 19868 states and 94944 transitions. Word has length 33 [2022-03-01 18:00:04,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:04,719 INFO L470 AbstractCegarLoop]: Abstraction has 19868 states and 94944 transitions. [2022-03-01 18:00:04,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:04,719 INFO L276 IsEmpty]: Start isEmpty. Operand 19868 states and 94944 transitions. [2022-03-01 18:00:04,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:00:04,763 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:04,763 INFO L514 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] [2022-03-01 18:00:04,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2022-03-01 18:00:04,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:04,975 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:04,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:04,976 INFO L85 PathProgramCache]: Analyzing trace with hash -787468167, now seen corresponding path program 127 times [2022-03-01 18:00:04,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:04,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292796817] [2022-03-01 18:00:04,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:04,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:04,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:05,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:05,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:05,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292796817] [2022-03-01 18:00:05,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292796817] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:05,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95522529] [2022-03-01 18:00:05,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:00:05,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:05,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:05,102 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:05,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-03-01 18:00:05,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:05,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:00:05,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:05,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:05,354 INFO L387 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 37 treesize of output 21 [2022-03-01 18:00:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:05,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:05,617 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 18:00:05,618 INFO L387 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 27 treesize of output 48 [2022-03-01 18:00:05,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:05,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:05,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:05,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:05,658 INFO L387 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 27 treesize of output 7 [2022-03-01 18:00:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:05,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95522529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:05,697 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:05,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 18:00:05,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721840280] [2022-03-01 18:00:05,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:05,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:00:05,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:05,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:00:05,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:00:05,698 INFO L87 Difference]: Start difference. First operand 19868 states and 94944 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:09,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:09,204 INFO L93 Difference]: Finished difference Result 24624 states and 114063 transitions. [2022-03-01 18:00:09,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-01 18:00:09,204 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:00:09,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:09,310 INFO L225 Difference]: With dead ends: 24624 [2022-03-01 18:00:09,311 INFO L226 Difference]: Without dead ends: 24563 [2022-03-01 18:00:09,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1985 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=712, Invalid=5930, Unknown=0, NotChecked=0, Total=6642 [2022-03-01 18:00:09,311 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 905 mSDsluCounter, 3421 mSDsCounter, 0 mSdLazyCounter, 4522 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 4674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 4522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:09,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [905 Valid, 1435 Invalid, 4674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 4522 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-01 18:00:09,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24563 states. [2022-03-01 18:00:10,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24563 to 20222. [2022-03-01 18:00:10,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20222 states, 20221 states have (on average 4.7920973245635725) internal successors, (96901), 20221 states have internal predecessors, (96901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:10,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20222 states to 20222 states and 96901 transitions. [2022-03-01 18:00:10,162 INFO L78 Accepts]: Start accepts. Automaton has 20222 states and 96901 transitions. Word has length 33 [2022-03-01 18:00:10,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:10,162 INFO L470 AbstractCegarLoop]: Abstraction has 20222 states and 96901 transitions. [2022-03-01 18:00:10,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:10,163 INFO L276 IsEmpty]: Start isEmpty. Operand 20222 states and 96901 transitions. [2022-03-01 18:00:10,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:00:10,224 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:10,224 INFO L514 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] [2022-03-01 18:00:10,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:10,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:10,448 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:10,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:10,448 INFO L85 PathProgramCache]: Analyzing trace with hash 515804439, now seen corresponding path program 128 times [2022-03-01 18:00:10,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:10,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027392693] [2022-03-01 18:00:10,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:10,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:10,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:10,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027392693] [2022-03-01 18:00:10,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027392693] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:10,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528397689] [2022-03-01 18:00:10,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:00:10,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:10,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:10,621 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:10,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-03-01 18:00:10,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:00:10,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:10,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:00:10,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:10,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:10,948 INFO L387 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 [2022-03-01 18:00:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:11,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:11,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:11,658 INFO L387 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 17 treesize of output 22 [2022-03-01 18:00:11,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:11,668 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 18:00:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:11,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528397689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:11,732 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:11,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 28 [2022-03-01 18:00:11,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997975336] [2022-03-01 18:00:11,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:11,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:00:11,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:11,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:00:11,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:00:11,733 INFO L87 Difference]: Start difference. First operand 20222 states and 96901 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:13,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:13,816 INFO L93 Difference]: Finished difference Result 21298 states and 101161 transitions. [2022-03-01 18:00:13,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 18:00:13,817 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 18:00:13,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:13,901 INFO L225 Difference]: With dead ends: 21298 [2022-03-01 18:00:13,901 INFO L226 Difference]: Without dead ends: 21287 [2022-03-01 18:00:13,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=391, Invalid=2471, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 18:00:13,902 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 496 mSDsluCounter, 2405 mSDsCounter, 0 mSdLazyCounter, 2583 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 3500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 857 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:13,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 983 Invalid, 3500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2583 Invalid, 0 Unknown, 857 Unchecked, 1.2s Time] [2022-03-01 18:00:13,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21287 states. [2022-03-01 18:00:14,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21287 to 20279. [2022-03-01 18:00:14,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20279 states, 20278 states have (on average 4.7906105138573825) internal successors, (97144), 20278 states have internal predecessors, (97144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:14,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20279 states to 20279 states and 97144 transitions. [2022-03-01 18:00:14,580 INFO L78 Accepts]: Start accepts. Automaton has 20279 states and 97144 transitions. Word has length 33 [2022-03-01 18:00:14,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:14,581 INFO L470 AbstractCegarLoop]: Abstraction has 20279 states and 97144 transitions. [2022-03-01 18:00:14,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:14,581 INFO L276 IsEmpty]: Start isEmpty. Operand 20279 states and 97144 transitions. [2022-03-01 18:00:14,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:00:14,638 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:14,638 INFO L514 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] [2022-03-01 18:00:14,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2022-03-01 18:00:14,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:14,845 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:14,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:14,846 INFO L85 PathProgramCache]: Analyzing trace with hash 319290934, now seen corresponding path program 19 times [2022-03-01 18:00:14,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:14,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58755565] [2022-03-01 18:00:14,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:14,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:15,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:15,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58755565] [2022-03-01 18:00:15,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58755565] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:15,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68878282] [2022-03-01 18:00:15,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:00:15,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:15,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:15,043 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:15,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-03-01 18:00:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:15,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:00:15,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:15,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:15,450 INFO L387 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 [2022-03-01 18:00:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:15,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:15,786 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 18:00:15,786 INFO L387 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 27 treesize of output 48 [2022-03-01 18:00:15,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:15,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:15,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:15,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:15,835 INFO L387 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 27 treesize of output 7 [2022-03-01 18:00:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:15,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68878282] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:15,872 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:15,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-03-01 18:00:15,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967676911] [2022-03-01 18:00:15,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:15,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:00:15,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:15,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:00:15,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:00:15,872 INFO L87 Difference]: Start difference. First operand 20279 states and 97144 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:19,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:19,207 INFO L93 Difference]: Finished difference Result 24051 states and 111704 transitions. [2022-03-01 18:00:19,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-01 18:00:19,207 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 18:00:19,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:19,329 INFO L225 Difference]: With dead ends: 24051 [2022-03-01 18:00:19,330 INFO L226 Difference]: Without dead ends: 23927 [2022-03-01 18:00:19,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=608, Invalid=5092, Unknown=0, NotChecked=0, Total=5700 [2022-03-01 18:00:19,331 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 651 mSDsluCounter, 3715 mSDsCounter, 0 mSdLazyCounter, 4545 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 5328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 4545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 680 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:19,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 1605 Invalid, 5328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 4545 Invalid, 0 Unknown, 680 Unchecked, 1.9s Time] [2022-03-01 18:00:19,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23927 states. [2022-03-01 18:00:20,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23927 to 20060. [2022-03-01 18:00:20,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20060 states, 20059 states have (on average 4.793060471608754) internal successors, (96144), 20059 states have internal predecessors, (96144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:20,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20060 states to 20060 states and 96144 transitions. [2022-03-01 18:00:20,194 INFO L78 Accepts]: Start accepts. Automaton has 20060 states and 96144 transitions. Word has length 33 [2022-03-01 18:00:20,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:20,195 INFO L470 AbstractCegarLoop]: Abstraction has 20060 states and 96144 transitions. [2022-03-01 18:00:20,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:20,195 INFO L276 IsEmpty]: Start isEmpty. Operand 20060 states and 96144 transitions. [2022-03-01 18:00:20,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:00:20,252 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:20,252 INFO L514 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] [2022-03-01 18:00:20,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:20,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2022-03-01 18:00:20,459 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:20,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:20,460 INFO L85 PathProgramCache]: Analyzing trace with hash 305735485, now seen corresponding path program 129 times [2022-03-01 18:00:20,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:20,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838507347] [2022-03-01 18:00:20,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:20,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:20,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:20,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:20,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838507347] [2022-03-01 18:00:20,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838507347] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:20,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231181331] [2022-03-01 18:00:20,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:00:20,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:20,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:20,628 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:20,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-03-01 18:00:20,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:00:20,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:20,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:00:20,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:21,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:21,356 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:00:21,356 INFO L387 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 [2022-03-01 18:00:21,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:21,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:21,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231181331] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:21,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:21,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-03-01 18:00:21,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965633507] [2022-03-01 18:00:21,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:21,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:00:21,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:21,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:00:21,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:00:21,784 INFO L87 Difference]: Start difference. First operand 20060 states and 96144 transitions. Second operand has 35 states, 35 states have (on average 2.4) internal successors, (84), 34 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:27,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:27,397 INFO L93 Difference]: Finished difference Result 23691 states and 109980 transitions. [2022-03-01 18:00:27,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-01 18:00:27,397 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4) internal successors, (84), 34 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:00:27,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:27,478 INFO L225 Difference]: With dead ends: 23691 [2022-03-01 18:00:27,478 INFO L226 Difference]: Without dead ends: 23625 [2022-03-01 18:00:27,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2986 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=855, Invalid=10065, Unknown=0, NotChecked=0, Total=10920 [2022-03-01 18:00:27,479 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 938 mSDsluCounter, 5684 mSDsCounter, 0 mSdLazyCounter, 7452 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 2397 SdHoareTripleChecker+Invalid, 7642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 7452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:27,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [938 Valid, 2397 Invalid, 7642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 7452 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-01 18:00:27,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23625 states. [2022-03-01 18:00:27,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23625 to 20162. [2022-03-01 18:00:27,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20162 states, 20161 states have (on average 4.796785873716582) internal successors, (96708), 20161 states have internal predecessors, (96708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:28,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20162 states to 20162 states and 96708 transitions. [2022-03-01 18:00:28,052 INFO L78 Accepts]: Start accepts. Automaton has 20162 states and 96708 transitions. Word has length 33 [2022-03-01 18:00:28,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:28,052 INFO L470 AbstractCegarLoop]: Abstraction has 20162 states and 96708 transitions. [2022-03-01 18:00:28,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4) internal successors, (84), 34 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:28,052 INFO L276 IsEmpty]: Start isEmpty. Operand 20162 states and 96708 transitions. [2022-03-01 18:00:28,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:00:28,099 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:28,099 INFO L514 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] [2022-03-01 18:00:28,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:28,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-03-01 18:00:28,315 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:28,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:28,316 INFO L85 PathProgramCache]: Analyzing trace with hash 739764831, now seen corresponding path program 130 times [2022-03-01 18:00:28,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:28,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456838647] [2022-03-01 18:00:28,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:28,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:28,441 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:28,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456838647] [2022-03-01 18:00:28,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456838647] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:28,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644300757] [2022-03-01 18:00:28,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:00:28,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:28,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:28,443 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:28,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-03-01 18:00:28,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:00:28,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:28,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:00:28,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:28,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:28,904 INFO L387 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 37 treesize of output 21 [2022-03-01 18:00:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:29,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:29,290 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 18:00:29,290 INFO L387 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 27 treesize of output 48 [2022-03-01 18:00:29,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:29,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:29,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:29,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:29,336 INFO L387 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 27 treesize of output 7 [2022-03-01 18:00:29,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:29,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644300757] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:29,368 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:29,368 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 18:00:29,368 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034012126] [2022-03-01 18:00:29,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:29,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:00:29,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:29,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:00:29,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:00:29,369 INFO L87 Difference]: Start difference. First operand 20162 states and 96708 transitions. Second operand has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:32,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:32,452 INFO L93 Difference]: Finished difference Result 23174 states and 108727 transitions. [2022-03-01 18:00:32,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-01 18:00:32,453 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:00:32,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:32,537 INFO L225 Difference]: With dead ends: 23174 [2022-03-01 18:00:32,538 INFO L226 Difference]: Without dead ends: 23115 [2022-03-01 18:00:32,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=463, Invalid=5087, Unknown=0, NotChecked=0, Total=5550 [2022-03-01 18:00:32,538 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 547 mSDsluCounter, 4679 mSDsCounter, 0 mSdLazyCounter, 6317 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 2000 SdHoareTripleChecker+Invalid, 6417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 6317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:32,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 2000 Invalid, 6417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 6317 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-01 18:00:32,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23115 states. [2022-03-01 18:00:33,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23115 to 20207. [2022-03-01 18:00:33,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20207 states, 20206 states have (on average 4.798871622290409) internal successors, (96966), 20206 states have internal predecessors, (96966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:33,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20207 states to 20207 states and 96966 transitions. [2022-03-01 18:00:33,152 INFO L78 Accepts]: Start accepts. Automaton has 20207 states and 96966 transitions. Word has length 33 [2022-03-01 18:00:33,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:33,152 INFO L470 AbstractCegarLoop]: Abstraction has 20207 states and 96966 transitions. [2022-03-01 18:00:33,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:33,152 INFO L276 IsEmpty]: Start isEmpty. Operand 20207 states and 96966 transitions. [2022-03-01 18:00:33,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:00:33,201 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:33,201 INFO L514 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] [2022-03-01 18:00:33,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:33,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-03-01 18:00:33,410 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:33,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:33,410 INFO L85 PathProgramCache]: Analyzing trace with hash -462595609, now seen corresponding path program 131 times [2022-03-01 18:00:33,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:33,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532736061] [2022-03-01 18:00:33,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:33,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:33,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:33,591 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:33,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532736061] [2022-03-01 18:00:33,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532736061] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:33,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731241807] [2022-03-01 18:00:33,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:00:33,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:33,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:33,593 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:33,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-03-01 18:00:33,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:00:33,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:33,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:00:33,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:33,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:33,913 INFO L387 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 37 treesize of output 21 [2022-03-01 18:00:33,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:33,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:34,247 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 18:00:34,247 INFO L387 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 27 treesize of output 48 [2022-03-01 18:00:34,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:34,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:34,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:34,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:34,283 INFO L387 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 27 treesize of output 7 [2022-03-01 18:00:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:34,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731241807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:34,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:34,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-03-01 18:00:34,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673986344] [2022-03-01 18:00:34,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:34,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:00:34,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:34,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:00:34,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:00:34,317 INFO L87 Difference]: Start difference. First operand 20207 states and 96966 transitions. Second operand has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:36,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:36,494 INFO L93 Difference]: Finished difference Result 22478 states and 105898 transitions. [2022-03-01 18:00:36,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 18:00:36,495 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 18:00:36,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:36,571 INFO L225 Difference]: With dead ends: 22478 [2022-03-01 18:00:36,572 INFO L226 Difference]: Without dead ends: 22395 [2022-03-01 18:00:36,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=530, Invalid=4300, Unknown=0, NotChecked=0, Total=4830 [2022-03-01 18:00:36,572 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 757 mSDsluCounter, 3114 mSDsCounter, 0 mSdLazyCounter, 4108 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 4250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 4108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:36,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [757 Valid, 1225 Invalid, 4250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 4108 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-01 18:00:36,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22395 states. [2022-03-01 18:00:37,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22395 to 20354. [2022-03-01 18:00:37,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20354 states, 20353 states have (on average 4.801257799832949) internal successors, (97720), 20353 states have internal predecessors, (97720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:37,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20354 states to 20354 states and 97720 transitions. [2022-03-01 18:00:37,176 INFO L78 Accepts]: Start accepts. Automaton has 20354 states and 97720 transitions. Word has length 33 [2022-03-01 18:00:37,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:37,176 INFO L470 AbstractCegarLoop]: Abstraction has 20354 states and 97720 transitions. [2022-03-01 18:00:37,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:37,176 INFO L276 IsEmpty]: Start isEmpty. Operand 20354 states and 97720 transitions. [2022-03-01 18:00:37,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:00:37,222 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:37,222 INFO L514 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] [2022-03-01 18:00:37,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:37,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:37,435 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:37,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:37,436 INFO L85 PathProgramCache]: Analyzing trace with hash -833820615, now seen corresponding path program 132 times [2022-03-01 18:00:37,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:37,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234470191] [2022-03-01 18:00:37,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:37,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:37,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:37,709 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:37,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234470191] [2022-03-01 18:00:37,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234470191] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:37,709 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152726753] [2022-03-01 18:00:37,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:00:37,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:37,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:37,721 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:37,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-03-01 18:00:37,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:00:37,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:37,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-01 18:00:37,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:37,997 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-01 18:00:37,997 INFO L387 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 29 treesize of output 53 [2022-03-01 18:00:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:38,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:38,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:38,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152726753] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:38,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:38,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 29 [2022-03-01 18:00:38,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902428026] [2022-03-01 18:00:38,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:38,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:00:38,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:38,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:00:38,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:00:38,345 INFO L87 Difference]: Start difference. First operand 20354 states and 97720 transitions. Second operand has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:41,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:41,052 INFO L93 Difference]: Finished difference Result 23189 states and 108675 transitions. [2022-03-01 18:00:41,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-01 18:00:41,052 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 18:00:41,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:41,156 INFO L225 Difference]: With dead ends: 23189 [2022-03-01 18:00:41,157 INFO L226 Difference]: Without dead ends: 23143 [2022-03-01 18:00:41,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2083 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=926, Invalid=5880, Unknown=0, NotChecked=0, Total=6806 [2022-03-01 18:00:41,157 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 1048 mSDsluCounter, 2907 mSDsCounter, 0 mSdLazyCounter, 4023 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1048 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 4271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 4023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:41,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1048 Valid, 1252 Invalid, 4271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 4023 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-01 18:00:41,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23143 states. [2022-03-01 18:00:41,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23143 to 20486. [2022-03-01 18:00:41,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20486 states, 20485 states have (on average 4.804344642421284) internal successors, (98417), 20485 states have internal predecessors, (98417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:41,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20486 states to 20486 states and 98417 transitions. [2022-03-01 18:00:41,856 INFO L78 Accepts]: Start accepts. Automaton has 20486 states and 98417 transitions. Word has length 33 [2022-03-01 18:00:41,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:41,856 INFO L470 AbstractCegarLoop]: Abstraction has 20486 states and 98417 transitions. [2022-03-01 18:00:41,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:41,857 INFO L276 IsEmpty]: Start isEmpty. Operand 20486 states and 98417 transitions. [2022-03-01 18:00:42,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:00:42,018 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:42,018 INFO L514 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] [2022-03-01 18:00:42,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:42,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2022-03-01 18:00:42,239 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:42,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:42,240 INFO L85 PathProgramCache]: Analyzing trace with hash -142914755, now seen corresponding path program 133 times [2022-03-01 18:00:42,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:42,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631227842] [2022-03-01 18:00:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:42,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:42,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:42,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:42,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631227842] [2022-03-01 18:00:42,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631227842] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:42,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691308876] [2022-03-01 18:00:42,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:00:42,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:42,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:42,466 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:42,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-03-01 18:00:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:42,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:00:42,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:42,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:42,865 INFO L387 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 37 treesize of output 21 [2022-03-01 18:00:42,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:42,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:43,195 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 18:00:43,196 INFO L387 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 27 treesize of output 48 [2022-03-01 18:00:43,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:43,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:00:43,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:43,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:43,254 INFO L387 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 27 treesize of output 7 [2022-03-01 18:00:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:43,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691308876] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:43,294 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:43,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 18:00:43,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155302817] [2022-03-01 18:00:43,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:43,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:00:43,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:43,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:00:43,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:00:43,295 INFO L87 Difference]: Start difference. First operand 20486 states and 98417 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:46,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:46,804 INFO L93 Difference]: Finished difference Result 22037 states and 104508 transitions. [2022-03-01 18:00:46,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-01 18:00:46,804 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:00:46,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:46,903 INFO L225 Difference]: With dead ends: 22037 [2022-03-01 18:00:46,903 INFO L226 Difference]: Without dead ends: 21896 [2022-03-01 18:00:46,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=432, Invalid=4538, Unknown=0, NotChecked=0, Total=4970 [2022-03-01 18:00:46,904 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 496 mSDsluCounter, 3293 mSDsCounter, 0 mSdLazyCounter, 4361 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 4436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 4361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:46,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 1344 Invalid, 4436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 4361 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-01 18:00:46,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21896 states. [2022-03-01 18:00:47,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21896 to 20501. [2022-03-01 18:00:47,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20501 states, 20500 states have (on average 4.803365853658536) internal successors, (98469), 20500 states have internal predecessors, (98469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:47,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20501 states to 20501 states and 98469 transitions. [2022-03-01 18:00:47,768 INFO L78 Accepts]: Start accepts. Automaton has 20501 states and 98469 transitions. Word has length 33 [2022-03-01 18:00:47,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:47,768 INFO L470 AbstractCegarLoop]: Abstraction has 20501 states and 98469 transitions. [2022-03-01 18:00:47,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:47,769 INFO L276 IsEmpty]: Start isEmpty. Operand 20501 states and 98469 transitions. [2022-03-01 18:00:48,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:00:48,083 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:48,083 INFO L514 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] [2022-03-01 18:00:48,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:48,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-03-01 18:00:48,300 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:48,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:48,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1634186417, now seen corresponding path program 134 times [2022-03-01 18:00:48,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:48,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847083767] [2022-03-01 18:00:48,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:48,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:48,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:48,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847083767] [2022-03-01 18:00:48,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847083767] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:48,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016232695] [2022-03-01 18:00:48,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:00:48,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:48,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:48,476 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:48,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-03-01 18:00:48,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:00:48,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:48,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:00:48,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:48,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:48,869 INFO L387 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 33 treesize of output 49 [2022-03-01 18:00:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:49,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:49,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:00:49,479 INFO L387 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 17 treesize of output 22 [2022-03-01 18:00:49,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:49,487 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 18:00:49,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:49,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016232695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:49,534 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:49,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 28 [2022-03-01 18:00:49,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890726988] [2022-03-01 18:00:49,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:49,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-01 18:00:49,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:49,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-01 18:00:49,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-03-01 18:00:49,548 INFO L87 Difference]: Start difference. First operand 20501 states and 98469 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:51,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:51,212 INFO L93 Difference]: Finished difference Result 21133 states and 100911 transitions. [2022-03-01 18:00:51,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 18:00:51,212 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 18:00:51,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:51,298 INFO L225 Difference]: With dead ends: 21133 [2022-03-01 18:00:51,298 INFO L226 Difference]: Without dead ends: 21105 [2022-03-01 18:00:51,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=295, Invalid=1961, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 18:00:51,298 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 425 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 2510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:51,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 743 Invalid, 2510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2266 Invalid, 0 Unknown, 187 Unchecked, 1.0s Time] [2022-03-01 18:00:51,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21105 states. [2022-03-01 18:00:51,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21105 to 20489. [2022-03-01 18:00:51,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20489 states, 20488 states have (on average 4.803836392034362) internal successors, (98421), 20488 states have internal predecessors, (98421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:52,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20489 states to 20489 states and 98421 transitions. [2022-03-01 18:00:52,022 INFO L78 Accepts]: Start accepts. Automaton has 20489 states and 98421 transitions. Word has length 33 [2022-03-01 18:00:52,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:52,022 INFO L470 AbstractCegarLoop]: Abstraction has 20489 states and 98421 transitions. [2022-03-01 18:00:52,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:52,022 INFO L276 IsEmpty]: Start isEmpty. Operand 20489 states and 98421 transitions. [2022-03-01 18:00:52,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:00:52,083 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:52,083 INFO L514 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] [2022-03-01 18:00:52,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:52,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:52,299 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:52,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:52,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2072637043, now seen corresponding path program 135 times [2022-03-01 18:00:52,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:52,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975487902] [2022-03-01 18:00:52,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:52,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:52,513 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:52,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975487902] [2022-03-01 18:00:52,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975487902] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:52,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330020422] [2022-03-01 18:00:52,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:00:52,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:52,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:52,515 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:52,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-03-01 18:00:52,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:00:52,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:52,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:00:52,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:00:52,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:00:52,997 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:00:52,997 INFO L387 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 33 treesize of output 57 [2022-03-01 18:00:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:53,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:00:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:53,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330020422] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:00:53,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:00:53,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-01 18:00:53,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739494958] [2022-03-01 18:00:53,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:00:53,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:00:53,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:00:53,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:00:53,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:00:53,588 INFO L87 Difference]: Start difference. First operand 20489 states and 98421 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:58,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:00:58,403 INFO L93 Difference]: Finished difference Result 24700 states and 115256 transitions. [2022-03-01 18:00:58,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-01 18:00:58,403 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 18:00:58,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:00:58,606 INFO L225 Difference]: With dead ends: 24700 [2022-03-01 18:00:58,606 INFO L226 Difference]: Without dead ends: 24630 [2022-03-01 18:00:58,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3274 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1063, Invalid=9443, Unknown=0, NotChecked=0, Total=10506 [2022-03-01 18:00:58,607 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1322 mSDsluCounter, 3986 mSDsCounter, 0 mSdLazyCounter, 5631 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 5920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 5631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:00:58,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1322 Valid, 1636 Invalid, 5920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 5631 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-01 18:00:58,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24630 states. [2022-03-01 18:00:59,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24630 to 20629. [2022-03-01 18:00:59,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20629 states, 20628 states have (on average 4.812487880550708) internal successors, (99272), 20628 states have internal predecessors, (99272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:59,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20629 states to 20629 states and 99272 transitions. [2022-03-01 18:00:59,340 INFO L78 Accepts]: Start accepts. Automaton has 20629 states and 99272 transitions. Word has length 33 [2022-03-01 18:00:59,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:00:59,340 INFO L470 AbstractCegarLoop]: Abstraction has 20629 states and 99272 transitions. [2022-03-01 18:00:59,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:00:59,340 INFO L276 IsEmpty]: Start isEmpty. Operand 20629 states and 99272 transitions. [2022-03-01 18:00:59,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:00:59,392 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:00:59,392 INFO L514 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] [2022-03-01 18:00:59,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2022-03-01 18:00:59,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:59,608 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:00:59,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:00:59,609 INFO L85 PathProgramCache]: Analyzing trace with hash -919057647, now seen corresponding path program 136 times [2022-03-01 18:00:59,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:00:59,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080366261] [2022-03-01 18:00:59,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:00:59,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:00:59,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:00:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:00:59,768 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:00:59,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080366261] [2022-03-01 18:00:59,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080366261] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:00:59,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755179365] [2022-03-01 18:00:59,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:00:59,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:00:59,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:00:59,770 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:00:59,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-03-01 18:00:59,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:00:59,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:00:59,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:00:59,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:00,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:00,239 INFO L387 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 37 treesize of output 21 [2022-03-01 18:01:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:00,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:00,614 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 18:01:00,614 INFO L387 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 27 treesize of output 48 [2022-03-01 18:01:00,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:00,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:00,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:00,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:00,681 INFO L387 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 27 treesize of output 7 [2022-03-01 18:01:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:00,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755179365] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:00,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:00,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-03-01 18:01:00,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233600880] [2022-03-01 18:01:00,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:00,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:01:00,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:00,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:01:00,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:01:00,732 INFO L87 Difference]: Start difference. First operand 20629 states and 99272 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:03,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:03,513 INFO L93 Difference]: Finished difference Result 23201 states and 109217 transitions. [2022-03-01 18:01:03,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-01 18:01:03,514 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 18:01:03,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:03,627 INFO L225 Difference]: With dead ends: 23201 [2022-03-01 18:01:03,627 INFO L226 Difference]: Without dead ends: 22886 [2022-03-01 18:01:03,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=617, Invalid=4785, Unknown=0, NotChecked=0, Total=5402 [2022-03-01 18:01:03,628 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 704 mSDsluCounter, 3609 mSDsCounter, 0 mSdLazyCounter, 4828 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 1448 SdHoareTripleChecker+Invalid, 4942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 4828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:01:03,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 1448 Invalid, 4942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 4828 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-01 18:01:03,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22886 states. [2022-03-01 18:01:04,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22886 to 20740. [2022-03-01 18:01:04,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20740 states, 20739 states have (on average 4.813829017792565) internal successors, (99834), 20739 states have internal predecessors, (99834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:04,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20740 states to 20740 states and 99834 transitions. [2022-03-01 18:01:04,343 INFO L78 Accepts]: Start accepts. Automaton has 20740 states and 99834 transitions. Word has length 33 [2022-03-01 18:01:04,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:04,343 INFO L470 AbstractCegarLoop]: Abstraction has 20740 states and 99834 transitions. [2022-03-01 18:01:04,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:04,343 INFO L276 IsEmpty]: Start isEmpty. Operand 20740 states and 99834 transitions. [2022-03-01 18:01:04,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:01:04,535 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:04,535 INFO L514 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] [2022-03-01 18:01:04,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2022-03-01 18:01:04,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:04,751 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:01:04,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:04,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1703097933, now seen corresponding path program 137 times [2022-03-01 18:01:04,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:04,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966384439] [2022-03-01 18:01:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:04,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:04,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:04,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966384439] [2022-03-01 18:01:04,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966384439] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:04,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927651279] [2022-03-01 18:01:04,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:01:04,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:04,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:04,911 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:04,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-03-01 18:01:04,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:01:04,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:04,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:01:04,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:05,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:05,245 INFO L387 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 37 treesize of output 21 [2022-03-01 18:01:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:05,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:05,669 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 18:01:05,669 INFO L387 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 27 treesize of output 48 [2022-03-01 18:01:05,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:05,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:05,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:05,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:05,723 INFO L387 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 27 treesize of output 7 [2022-03-01 18:01:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:05,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927651279] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:05,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:05,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 18:01:05,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109588227] [2022-03-01 18:01:05,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:05,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:01:05,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:05,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:01:05,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:01:05,762 INFO L87 Difference]: Start difference. First operand 20740 states and 99834 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:08,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:08,682 INFO L93 Difference]: Finished difference Result 22383 states and 106307 transitions. [2022-03-01 18:01:08,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-01 18:01:08,682 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:01:08,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:08,778 INFO L225 Difference]: With dead ends: 22383 [2022-03-01 18:01:08,779 INFO L226 Difference]: Without dead ends: 22212 [2022-03-01 18:01:08,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1882 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=602, Invalid=6040, Unknown=0, NotChecked=0, Total=6642 [2022-03-01 18:01:08,779 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 648 mSDsluCounter, 3415 mSDsCounter, 0 mSdLazyCounter, 4501 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 4800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 4501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:01:08,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 1424 Invalid, 4800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 4501 Invalid, 0 Unknown, 167 Unchecked, 1.6s Time] [2022-03-01 18:01:08,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22212 states. [2022-03-01 18:01:09,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22212 to 20845. [2022-03-01 18:01:09,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20845 states, 20844 states have (on average 4.813471502590674) internal successors, (100332), 20844 states have internal predecessors, (100332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:09,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20845 states to 20845 states and 100332 transitions. [2022-03-01 18:01:09,493 INFO L78 Accepts]: Start accepts. Automaton has 20845 states and 100332 transitions. Word has length 33 [2022-03-01 18:01:09,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:09,493 INFO L470 AbstractCegarLoop]: Abstraction has 20845 states and 100332 transitions. [2022-03-01 18:01:09,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:09,494 INFO L276 IsEmpty]: Start isEmpty. Operand 20845 states and 100332 transitions. [2022-03-01 18:01:09,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:01:09,546 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:09,546 INFO L514 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] [2022-03-01 18:01:09,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Forceful destruction successful, exit code 0 [2022-03-01 18:01:09,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:09,760 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:01:09,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:09,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2028271939, now seen corresponding path program 138 times [2022-03-01 18:01:09,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:09,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493536480] [2022-03-01 18:01:09,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:09,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:09,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:09,923 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:09,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493536480] [2022-03-01 18:01:09,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493536480] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:09,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565265466] [2022-03-01 18:01:09,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:01:09,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:09,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:09,924 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:09,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-03-01 18:01:09,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:01:09,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:09,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:01:09,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:10,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:10,242 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:01:10,243 INFO L387 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 [2022-03-01 18:01:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:10,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:01:10,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565265466] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:10,709 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:10,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-01 18:01:10,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467300573] [2022-03-01 18:01:10,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:10,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:01:10,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:10,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:01:10,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:01:10,711 INFO L87 Difference]: Start difference. First operand 20845 states and 100332 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:15,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:15,174 INFO L93 Difference]: Finished difference Result 23637 states and 111408 transitions. [2022-03-01 18:01:15,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-01 18:01:15,174 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 18:01:15,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:15,287 INFO L225 Difference]: With dead ends: 23637 [2022-03-01 18:01:15,287 INFO L226 Difference]: Without dead ends: 23535 [2022-03-01 18:01:15,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2821 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=880, Invalid=8432, Unknown=0, NotChecked=0, Total=9312 [2022-03-01 18:01:15,288 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 1087 mSDsluCounter, 3464 mSDsCounter, 0 mSdLazyCounter, 4680 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1087 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 4940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 4680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-01 18:01:15,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1087 Valid, 1452 Invalid, 4940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 4680 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-01 18:01:15,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23535 states. [2022-03-01 18:01:15,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23535 to 21118. [2022-03-01 18:01:15,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21118 states, 21117 states have (on average 4.816119713974523) internal successors, (101702), 21117 states have internal predecessors, (101702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:16,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21118 states to 21118 states and 101702 transitions. [2022-03-01 18:01:16,101 INFO L78 Accepts]: Start accepts. Automaton has 21118 states and 101702 transitions. Word has length 33 [2022-03-01 18:01:16,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:16,101 INFO L470 AbstractCegarLoop]: Abstraction has 21118 states and 101702 transitions. [2022-03-01 18:01:16,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:16,102 INFO L276 IsEmpty]: Start isEmpty. Operand 21118 states and 101702 transitions. [2022-03-01 18:01:16,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:01:16,164 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:16,164 INFO L514 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] [2022-03-01 18:01:16,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2022-03-01 18:01:16,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2022-03-01 18:01:16,387 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:01:16,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:16,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1947014503, now seen corresponding path program 139 times [2022-03-01 18:01:16,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:16,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266540478] [2022-03-01 18:01:16,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:16,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:16,579 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:16,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266540478] [2022-03-01 18:01:16,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266540478] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:16,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952764268] [2022-03-01 18:01:16,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:01:16,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:16,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:16,581 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:16,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-03-01 18:01:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:16,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:01:16,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:17,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:17,060 INFO L387 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 37 treesize of output 21 [2022-03-01 18:01:17,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:17,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:17,472 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 18:01:17,472 INFO L387 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 27 treesize of output 48 [2022-03-01 18:01:17,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:17,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:17,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:17,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:17,540 INFO L387 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 27 treesize of output 7 [2022-03-01 18:01:17,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:17,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952764268] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:17,593 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:17,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-01 18:01:17,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100610987] [2022-03-01 18:01:17,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:17,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:01:17,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:17,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:01:17,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=966, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:01:17,594 INFO L87 Difference]: Start difference. First operand 21118 states and 101702 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:20,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:20,883 INFO L93 Difference]: Finished difference Result 22383 states and 106714 transitions. [2022-03-01 18:01:20,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-01 18:01:20,885 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:01:20,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:21,099 INFO L225 Difference]: With dead ends: 22383 [2022-03-01 18:01:21,100 INFO L226 Difference]: Without dead ends: 22247 [2022-03-01 18:01:21,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1348 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=445, Invalid=5105, Unknown=0, NotChecked=0, Total=5550 [2022-03-01 18:01:21,100 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 441 mSDsluCounter, 3534 mSDsCounter, 0 mSdLazyCounter, 4771 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 1538 SdHoareTripleChecker+Invalid, 4844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 4771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:01:21,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 1538 Invalid, 4844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 4771 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-01 18:01:21,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22247 states. [2022-03-01 18:01:21,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22247 to 21115. [2022-03-01 18:01:21,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21115 states, 21114 states have (on average 4.816567206592782) internal successors, (101697), 21114 states have internal predecessors, (101697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:21,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21115 states to 21115 states and 101697 transitions. [2022-03-01 18:01:21,837 INFO L78 Accepts]: Start accepts. Automaton has 21115 states and 101697 transitions. Word has length 33 [2022-03-01 18:01:21,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:21,837 INFO L470 AbstractCegarLoop]: Abstraction has 21115 states and 101697 transitions. [2022-03-01 18:01:21,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:21,837 INFO L276 IsEmpty]: Start isEmpty. Operand 21115 states and 101697 transitions. [2022-03-01 18:01:21,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:01:21,895 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:21,895 INFO L514 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] [2022-03-01 18:01:21,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2022-03-01 18:01:22,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2022-03-01 18:01:22,098 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:01:22,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:22,098 INFO L85 PathProgramCache]: Analyzing trace with hash 88830777, now seen corresponding path program 140 times [2022-03-01 18:01:22,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:22,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614760898] [2022-03-01 18:01:22,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:22,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:22,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:22,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:22,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614760898] [2022-03-01 18:01:22,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614760898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:22,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035405682] [2022-03-01 18:01:22,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:01:22,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:22,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:22,331 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:22,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-03-01 18:01:22,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:01:22,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:22,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:01:22,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:22,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:01:22,627 INFO L387 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 [2022-03-01 18:01:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:23,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:23,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:01:23,594 INFO L387 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 17 treesize of output 22 [2022-03-01 18:01:23,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:23,602 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 18:01:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:23,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035405682] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:23,643 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:23,643 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-01 18:01:23,643 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003089845] [2022-03-01 18:01:23,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:23,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:01:23,644 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:23,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:01:23,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:01:23,644 INFO L87 Difference]: Start difference. First operand 21115 states and 101697 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:25,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:25,142 INFO L93 Difference]: Finished difference Result 22105 states and 105613 transitions. [2022-03-01 18:01:25,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 18:01:25,142 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 18:01:25,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:25,230 INFO L225 Difference]: With dead ends: 22105 [2022-03-01 18:01:25,231 INFO L226 Difference]: Without dead ends: 22095 [2022-03-01 18:01:25,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=286, Invalid=2164, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 18:01:25,231 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 502 mSDsluCounter, 2110 mSDsCounter, 0 mSdLazyCounter, 2605 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 3033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 2605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:01:25,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 889 Invalid, 3033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 2605 Invalid, 0 Unknown, 358 Unchecked, 0.9s Time] [2022-03-01 18:01:25,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22095 states. [2022-03-01 18:01:25,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22095 to 21244. [2022-03-01 18:01:25,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21244 states, 21243 states have (on average 4.813397354422634) internal successors, (102251), 21243 states have internal predecessors, (102251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:25,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21244 states to 21244 states and 102251 transitions. [2022-03-01 18:01:25,832 INFO L78 Accepts]: Start accepts. Automaton has 21244 states and 102251 transitions. Word has length 33 [2022-03-01 18:01:25,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:25,832 INFO L470 AbstractCegarLoop]: Abstraction has 21244 states and 102251 transitions. [2022-03-01 18:01:25,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:25,832 INFO L276 IsEmpty]: Start isEmpty. Operand 21244 states and 102251 transitions. [2022-03-01 18:01:25,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:01:25,885 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:25,885 INFO L514 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] [2022-03-01 18:01:25,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Forceful destruction successful, exit code 0 [2022-03-01 18:01:26,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:26,103 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:01:26,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:26,103 INFO L85 PathProgramCache]: Analyzing trace with hash 976334458, now seen corresponding path program 20 times [2022-03-01 18:01:26,103 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:26,103 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780090662] [2022-03-01 18:01:26,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:26,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:26,255 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:26,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780090662] [2022-03-01 18:01:26,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780090662] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:26,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139624304] [2022-03-01 18:01:26,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:01:26,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:26,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:26,256 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:26,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-03-01 18:01:26,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:01:26,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:26,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:01:26,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:26,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:01:26,569 INFO L387 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 33 treesize of output 49 [2022-03-01 18:01:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:27,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:27,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:01:27,570 INFO L387 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 17 treesize of output 22 [2022-03-01 18:01:27,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:27,577 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 18:01:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:27,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139624304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:27,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:27,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-01 18:01:27,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536687310] [2022-03-01 18:01:27,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:27,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:01:27,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:27,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:01:27,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:01:27,615 INFO L87 Difference]: Start difference. First operand 21244 states and 102251 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:30,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:30,284 INFO L93 Difference]: Finished difference Result 22124 states and 105583 transitions. [2022-03-01 18:01:30,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 18:01:30,284 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 18:01:30,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:30,433 INFO L225 Difference]: With dead ends: 22124 [2022-03-01 18:01:30,433 INFO L226 Difference]: Without dead ends: 22073 [2022-03-01 18:01:30,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=333, Invalid=2319, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 18:01:30,433 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 412 mSDsluCounter, 2780 mSDsCounter, 0 mSdLazyCounter, 2914 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 3922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 945 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 18:01:30,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 1059 Invalid, 3922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2914 Invalid, 0 Unknown, 945 Unchecked, 1.0s Time] [2022-03-01 18:01:30,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22073 states. [2022-03-01 18:01:30,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22073 to 21234. [2022-03-01 18:01:31,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21234 states, 21233 states have (on average 4.814251401120897) internal successors, (102221), 21233 states have internal predecessors, (102221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:31,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21234 states to 21234 states and 102221 transitions. [2022-03-01 18:01:31,099 INFO L78 Accepts]: Start accepts. Automaton has 21234 states and 102221 transitions. Word has length 33 [2022-03-01 18:01:31,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:31,100 INFO L470 AbstractCegarLoop]: Abstraction has 21234 states and 102221 transitions. [2022-03-01 18:01:31,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:31,100 INFO L276 IsEmpty]: Start isEmpty. Operand 21234 states and 102221 transitions. [2022-03-01 18:01:31,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:01:31,155 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:31,155 INFO L514 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] [2022-03-01 18:01:31,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2022-03-01 18:01:31,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-03-01 18:01:31,370 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:01:31,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:31,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1392103383, now seen corresponding path program 141 times [2022-03-01 18:01:31,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:31,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647136878] [2022-03-01 18:01:31,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:31,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:31,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:31,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:31,688 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:31,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647136878] [2022-03-01 18:01:31,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647136878] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:31,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493779300] [2022-03-01 18:01:31,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:01:31,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:31,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:31,690 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:31,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-03-01 18:01:31,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:01:31,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:31,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:01:31,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:32,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:01:32,173 INFO L387 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 33 treesize of output 49 [2022-03-01 18:01:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:32,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:33,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:01:33,377 INFO L387 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 17 treesize of output 22 [2022-03-01 18:01:33,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:33,390 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 18:01:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:33,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493779300] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:33,451 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:33,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-01 18:01:33,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860599432] [2022-03-01 18:01:33,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:33,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:01:33,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:33,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:01:33,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:01:33,452 INFO L87 Difference]: Start difference. First operand 21234 states and 102221 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:35,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:35,689 INFO L93 Difference]: Finished difference Result 22058 states and 105290 transitions. [2022-03-01 18:01:35,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 18:01:35,689 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 18:01:35,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:35,901 INFO L225 Difference]: With dead ends: 22058 [2022-03-01 18:01:35,902 INFO L226 Difference]: Without dead ends: 22049 [2022-03-01 18:01:35,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=309, Invalid=2043, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 18:01:35,902 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 479 mSDsluCounter, 2631 mSDsCounter, 0 mSdLazyCounter, 2930 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 3719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 717 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:01:35,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 1023 Invalid, 3719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2930 Invalid, 0 Unknown, 717 Unchecked, 1.5s Time] [2022-03-01 18:01:35,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22049 states. [2022-03-01 18:01:36,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22049 to 21234. [2022-03-01 18:01:36,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21234 states, 21233 states have (on average 4.814251401120897) internal successors, (102221), 21233 states have internal predecessors, (102221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:36,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21234 states to 21234 states and 102221 transitions. [2022-03-01 18:01:36,668 INFO L78 Accepts]: Start accepts. Automaton has 21234 states and 102221 transitions. Word has length 33 [2022-03-01 18:01:36,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:36,668 INFO L470 AbstractCegarLoop]: Abstraction has 21234 states and 102221 transitions. [2022-03-01 18:01:36,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:36,669 INFO L276 IsEmpty]: Start isEmpty. Operand 21234 states and 102221 transitions. [2022-03-01 18:01:36,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:01:36,723 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:36,724 INFO L514 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] [2022-03-01 18:01:36,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2022-03-01 18:01:36,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2022-03-01 18:01:36,939 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:01:36,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:36,940 INFO L85 PathProgramCache]: Analyzing trace with hash -276290059, now seen corresponding path program 142 times [2022-03-01 18:01:36,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:36,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113334803] [2022-03-01 18:01:36,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:36,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:37,152 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:37,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113334803] [2022-03-01 18:01:37,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113334803] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:37,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43076406] [2022-03-01 18:01:37,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:01:37,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:37,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:37,153 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:37,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-03-01 18:01:37,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:01:37,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:37,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:01:37,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:37,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:37,546 INFO L387 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 37 treesize of output 21 [2022-03-01 18:01:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:37,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:37,958 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 18:01:37,959 INFO L387 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 27 treesize of output 48 [2022-03-01 18:01:38,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:38,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:38,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:38,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:38,019 INFO L387 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 27 treesize of output 7 [2022-03-01 18:01:38,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:38,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43076406] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:38,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:38,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-03-01 18:01:38,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228536463] [2022-03-01 18:01:38,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:38,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:01:38,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:38,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:01:38,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:01:38,185 INFO L87 Difference]: Start difference. First operand 21234 states and 102221 transitions. Second operand has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 30 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:41,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:41,122 INFO L93 Difference]: Finished difference Result 22994 states and 109134 transitions. [2022-03-01 18:01:41,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-01 18:01:41,123 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 30 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 18:01:41,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:41,236 INFO L225 Difference]: With dead ends: 22994 [2022-03-01 18:01:41,236 INFO L226 Difference]: Without dead ends: 22980 [2022-03-01 18:01:41,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=418, Invalid=3614, Unknown=0, NotChecked=0, Total=4032 [2022-03-01 18:01:41,237 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 679 mSDsluCounter, 3220 mSDsCounter, 0 mSdLazyCounter, 3796 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 4277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 3796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:01:41,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [679 Valid, 1461 Invalid, 4277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 3796 Invalid, 0 Unknown, 363 Unchecked, 1.7s Time] [2022-03-01 18:01:41,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22980 states. [2022-03-01 18:01:41,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22980 to 21520. [2022-03-01 18:01:41,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21520 states, 21519 states have (on average 4.807193642827269) internal successors, (103446), 21519 states have internal predecessors, (103446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:42,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21520 states to 21520 states and 103446 transitions. [2022-03-01 18:01:42,034 INFO L78 Accepts]: Start accepts. Automaton has 21520 states and 103446 transitions. Word has length 33 [2022-03-01 18:01:42,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:42,034 INFO L470 AbstractCegarLoop]: Abstraction has 21520 states and 103446 transitions. [2022-03-01 18:01:42,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 30 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:42,034 INFO L276 IsEmpty]: Start isEmpty. Operand 21520 states and 103446 transitions. [2022-03-01 18:01:42,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:01:42,098 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:42,098 INFO L514 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] [2022-03-01 18:01:42,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-03-01 18:01:42,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2022-03-01 18:01:42,311 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:01:42,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:42,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1438737227, now seen corresponding path program 143 times [2022-03-01 18:01:42,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:42,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462970604] [2022-03-01 18:01:42,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:42,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:42,546 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:42,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462970604] [2022-03-01 18:01:42,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462970604] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:42,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015823996] [2022-03-01 18:01:42,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 18:01:42,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:42,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:42,558 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:42,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-03-01 18:01:42,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 18:01:42,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:42,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-01 18:01:42,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:42,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:42,927 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:01:42,928 INFO L387 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 31 treesize of output 37 [2022-03-01 18:01:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:43,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:43,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:43,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:43,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:01:43,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 68 [2022-03-01 18:01:43,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:43,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015823996] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:43,971 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:43,971 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-03-01 18:01:43,971 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755040576] [2022-03-01 18:01:43,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:43,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:01:43,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:43,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:01:43,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:01:43,972 INFO L87 Difference]: Start difference. First operand 21520 states and 103446 transitions. Second operand has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 34 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:48,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:48,171 INFO L93 Difference]: Finished difference Result 23363 states and 110242 transitions. [2022-03-01 18:01:48,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-01 18:01:48,171 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 34 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:01:48,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:48,275 INFO L225 Difference]: With dead ends: 23363 [2022-03-01 18:01:48,275 INFO L226 Difference]: Without dead ends: 23299 [2022-03-01 18:01:48,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 46 SyntacticMatches, 11 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2685 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=872, Invalid=7318, Unknown=0, NotChecked=0, Total=8190 [2022-03-01 18:01:48,276 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 881 mSDsluCounter, 4301 mSDsCounter, 0 mSdLazyCounter, 3940 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 1761 SdHoareTripleChecker+Invalid, 5782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 3940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1687 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-01 18:01:48,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [881 Valid, 1761 Invalid, 5782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 3940 Invalid, 0 Unknown, 1687 Unchecked, 1.8s Time] [2022-03-01 18:01:48,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23299 states. [2022-03-01 18:01:48,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23299 to 21452. [2022-03-01 18:01:48,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21452 states, 21451 states have (on average 4.812689385110251) internal successors, (103237), 21451 states have internal predecessors, (103237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:48,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21452 states to 21452 states and 103237 transitions. [2022-03-01 18:01:48,990 INFO L78 Accepts]: Start accepts. Automaton has 21452 states and 103237 transitions. Word has length 33 [2022-03-01 18:01:48,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:48,990 INFO L470 AbstractCegarLoop]: Abstraction has 21452 states and 103237 transitions. [2022-03-01 18:01:48,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 34 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:48,991 INFO L276 IsEmpty]: Start isEmpty. Operand 21452 states and 103237 transitions. [2022-03-01 18:01:49,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:01:49,046 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:49,046 INFO L514 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] [2022-03-01 18:01:49,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-03-01 18:01:49,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:49,248 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:01:49,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:49,248 INFO L85 PathProgramCache]: Analyzing trace with hash 492741311, now seen corresponding path program 144 times [2022-03-01 18:01:49,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:49,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548750577] [2022-03-01 18:01:49,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:49,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:49,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:49,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548750577] [2022-03-01 18:01:49,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548750577] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:49,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732948414] [2022-03-01 18:01:49,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 18:01:49,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:49,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:49,464 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:49,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-03-01 18:01:49,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 18:01:49,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:01:49,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:01:49,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:49,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:49,752 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:01:49,752 INFO L387 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 33 treesize of output 57 [2022-03-01 18:01:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:49,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:50,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:50,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732948414] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:50,378 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:50,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 34 [2022-03-01 18:01:50,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020629707] [2022-03-01 18:01:50,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:50,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 18:01:50,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:50,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 18:01:50,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 18:01:50,379 INFO L87 Difference]: Start difference. First operand 21452 states and 103237 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:56,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:01:56,864 INFO L93 Difference]: Finished difference Result 25754 states and 118972 transitions. [2022-03-01 18:01:56,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-01 18:01:56,865 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:01:56,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:01:56,970 INFO L225 Difference]: With dead ends: 25754 [2022-03-01 18:01:56,971 INFO L226 Difference]: Without dead ends: 25667 [2022-03-01 18:01:56,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3173 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1330, Invalid=8570, Unknown=0, NotChecked=0, Total=9900 [2022-03-01 18:01:56,972 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1327 mSDsluCounter, 4398 mSDsCounter, 0 mSdLazyCounter, 5505 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 5781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 5505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-01 18:01:56,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1327 Valid, 1779 Invalid, 5781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 5505 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-01 18:01:57,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25667 states. [2022-03-01 18:01:57,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25667 to 21902. [2022-03-01 18:01:57,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21902 states, 21901 states have (on average 4.818638418337062) internal successors, (105533), 21901 states have internal predecessors, (105533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:57,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21902 states to 21902 states and 105533 transitions. [2022-03-01 18:01:57,856 INFO L78 Accepts]: Start accepts. Automaton has 21902 states and 105533 transitions. Word has length 33 [2022-03-01 18:01:57,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:01:57,856 INFO L470 AbstractCegarLoop]: Abstraction has 21902 states and 105533 transitions. [2022-03-01 18:01:57,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:01:57,856 INFO L276 IsEmpty]: Start isEmpty. Operand 21902 states and 105533 transitions. [2022-03-01 18:01:57,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:01:57,911 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:01:57,911 INFO L514 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] [2022-03-01 18:01:57,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Forceful destruction successful, exit code 0 [2022-03-01 18:01:58,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:58,128 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:01:58,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:01:58,128 INFO L85 PathProgramCache]: Analyzing trace with hash 608063097, now seen corresponding path program 145 times [2022-03-01 18:01:58,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:01:58,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485493053] [2022-03-01 18:01:58,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:01:58,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:01:58,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:58,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:01:58,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485493053] [2022-03-01 18:01:58,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485493053] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:01:58,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747881760] [2022-03-01 18:01:58,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 18:01:58,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:01:58,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:01:58,277 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:01:58,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-03-01 18:01:58,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:01:58,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:01:58,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:01:58,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:58,582 INFO L387 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 37 treesize of output 21 [2022-03-01 18:01:58,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:58,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:01:59,054 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 18:01:59,054 INFO L387 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 27 treesize of output 48 [2022-03-01 18:01:59,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:59,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:01:59,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:59,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:01:59,089 INFO L387 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 27 treesize of output 7 [2022-03-01 18:01:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:01:59,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747881760] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:01:59,121 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:01:59,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-01 18:01:59,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564688547] [2022-03-01 18:01:59,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:01:59,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:01:59,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:01:59,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:01:59,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:01:59,121 INFO L87 Difference]: Start difference. First operand 21902 states and 105533 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:01,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:01,980 INFO L93 Difference]: Finished difference Result 23043 states and 109950 transitions. [2022-03-01 18:02:01,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-01 18:02:01,981 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have 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 [2022-03-01 18:02:01,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:02,074 INFO L225 Difference]: With dead ends: 23043 [2022-03-01 18:02:02,074 INFO L226 Difference]: Without dead ends: 23031 [2022-03-01 18:02:02,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=511, Invalid=4601, Unknown=0, NotChecked=0, Total=5112 [2022-03-01 18:02:02,075 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 551 mSDsluCounter, 3416 mSDsCounter, 0 mSdLazyCounter, 4702 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 4839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 4702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:02:02,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 1456 Invalid, 4839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 4702 Invalid, 0 Unknown, 17 Unchecked, 1.7s Time] [2022-03-01 18:02:02,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23031 states. [2022-03-01 18:02:02,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23031 to 21977. [2022-03-01 18:02:02,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21977 states, 21976 states have (on average 4.811749180924645) internal successors, (105743), 21976 states have internal predecessors, (105743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:02,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21977 states to 21977 states and 105743 transitions. [2022-03-01 18:02:02,840 INFO L78 Accepts]: Start accepts. Automaton has 21977 states and 105743 transitions. Word has length 33 [2022-03-01 18:02:02,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:02,840 INFO L470 AbstractCegarLoop]: Abstraction has 21977 states and 105743 transitions. [2022-03-01 18:02:02,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:02,840 INFO L276 IsEmpty]: Start isEmpty. Operand 21977 states and 105743 transitions. [2022-03-01 18:02:02,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:02:02,895 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:02,895 INFO L514 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] [2022-03-01 18:02:02,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Forceful destruction successful, exit code 0 [2022-03-01 18:02:03,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable262 [2022-03-01 18:02:03,112 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:02:03,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:03,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1495566778, now seen corresponding path program 21 times [2022-03-01 18:02:03,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:03,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990891201] [2022-03-01 18:02:03,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:03,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:03,262 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:03,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990891201] [2022-03-01 18:02:03,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990891201] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:03,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587805713] [2022-03-01 18:02:03,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:02:03,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:03,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:03,263 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:02:03,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-03-01 18:02:03,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:02:03,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:03,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:02:03,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:03,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:03,651 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-01 18:02:03,651 INFO L387 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 [2022-03-01 18:02:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:03,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:04,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:02:04,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587805713] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:04,536 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:04,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-01 18:02:04,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371154629] [2022-03-01 18:02:04,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:04,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-01 18:02:04,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:04,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-01 18:02:04,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 18:02:04,537 INFO L87 Difference]: Start difference. First operand 21977 states and 105743 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:11,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:11,467 INFO L93 Difference]: Finished difference Result 24718 states and 116208 transitions. [2022-03-01 18:02:11,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-01 18:02:11,467 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 18:02:11,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:11,573 INFO L225 Difference]: With dead ends: 24718 [2022-03-01 18:02:11,573 INFO L226 Difference]: Without dead ends: 24575 [2022-03-01 18:02:11,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3026 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=912, Invalid=9594, Unknown=0, NotChecked=0, Total=10506 [2022-03-01 18:02:11,574 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 1134 mSDsluCounter, 4603 mSDsCounter, 0 mSdLazyCounter, 6325 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 1898 SdHoareTripleChecker+Invalid, 6585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 6325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-01 18:02:11,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1134 Valid, 1898 Invalid, 6585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 6325 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-01 18:02:11,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24575 states. [2022-03-01 18:02:12,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24575 to 22026. [2022-03-01 18:02:12,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22026 states, 22025 states have (on average 4.813620885357548) internal successors, (106020), 22025 states have internal predecessors, (106020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:12,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22026 states to 22026 states and 106020 transitions. [2022-03-01 18:02:12,393 INFO L78 Accepts]: Start accepts. Automaton has 22026 states and 106020 transitions. Word has length 33 [2022-03-01 18:02:12,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:12,393 INFO L470 AbstractCegarLoop]: Abstraction has 22026 states and 106020 transitions. [2022-03-01 18:02:12,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:12,393 INFO L276 IsEmpty]: Start isEmpty. Operand 22026 states and 106020 transitions. [2022-03-01 18:02:12,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:02:12,451 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:12,451 INFO L514 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] [2022-03-01 18:02:12,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Forceful destruction successful, exit code 0 [2022-03-01 18:02:12,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:12,669 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:02:12,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:12,669 INFO L85 PathProgramCache]: Analyzing trace with hash 44465673, now seen corresponding path program 146 times [2022-03-01 18:02:12,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:12,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792577376] [2022-03-01 18:02:12,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:12,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:12,866 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:12,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792577376] [2022-03-01 18:02:12,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792577376] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:12,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763939328] [2022-03-01 18:02:12,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 18:02:12,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:12,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:12,867 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:02:12,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-03-01 18:02:12,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 18:02:12,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:12,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:02:12,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:13,225 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:02:13,226 INFO L387 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 33 treesize of output 49 [2022-03-01 18:02:14,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:14,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:14,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 18:02:14,270 INFO L387 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 17 treesize of output 22 [2022-03-01 18:02:14,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:14,279 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-03-01 18:02:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:14,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763939328] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:14,325 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:14,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-03-01 18:02:14,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817084984] [2022-03-01 18:02:14,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:14,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-01 18:02:14,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:14,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-01 18:02:14,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-03-01 18:02:14,326 INFO L87 Difference]: Start difference. First operand 22026 states and 106020 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:17,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:17,288 INFO L93 Difference]: Finished difference Result 22796 states and 109021 transitions. [2022-03-01 18:02:17,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 18:02:17,289 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 18:02:17,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:17,391 INFO L225 Difference]: With dead ends: 22796 [2022-03-01 18:02:17,391 INFO L226 Difference]: Without dead ends: 22761 [2022-03-01 18:02:17,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=283, Invalid=2167, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 18:02:17,392 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 376 mSDsluCounter, 2884 mSDsCounter, 0 mSdLazyCounter, 3337 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 4128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 3337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 733 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-01 18:02:17,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 1128 Invalid, 4128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 3337 Invalid, 0 Unknown, 733 Unchecked, 1.5s Time] [2022-03-01 18:02:17,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22761 states. [2022-03-01 18:02:17,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22761 to 22037. [2022-03-01 18:02:18,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22037 states, 22036 states have (on average 4.812080232347069) internal successors, (106039), 22036 states have internal predecessors, (106039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:18,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22037 states to 22037 states and 106039 transitions. [2022-03-01 18:02:18,117 INFO L78 Accepts]: Start accepts. Automaton has 22037 states and 106039 transitions. Word has length 33 [2022-03-01 18:02:18,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:18,117 INFO L470 AbstractCegarLoop]: Abstraction has 22037 states and 106039 transitions. [2022-03-01 18:02:18,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:18,117 INFO L276 IsEmpty]: Start isEmpty. Operand 22037 states and 106039 transitions. [2022-03-01 18:02:18,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:02:18,173 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:18,173 INFO L514 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] [2022-03-01 18:02:18,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Forceful destruction successful, exit code 0 [2022-03-01 18:02:18,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:18,381 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:02:18,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:18,381 INFO L85 PathProgramCache]: Analyzing trace with hash -326759333, now seen corresponding path program 147 times [2022-03-01 18:02:18,381 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:18,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580502961] [2022-03-01 18:02:18,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:18,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:18,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:18,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:18,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580502961] [2022-03-01 18:02:18,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580502961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:18,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311692318] [2022-03-01 18:02:18,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 18:02:18,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:18,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:18,649 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:02:18,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-03-01 18:02:18,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 18:02:18,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:18,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-01 18:02:18,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:19,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:19,223 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-03-01 18:02:19,224 INFO L387 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 32 treesize of output 58 [2022-03-01 18:02:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:19,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:20,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 18:02:20,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311692318] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:20,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:20,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 31 [2022-03-01 18:02:20,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784610871] [2022-03-01 18:02:20,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:20,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 18:02:20,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:20,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 18:02:20,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-03-01 18:02:20,092 INFO L87 Difference]: Start difference. First operand 22037 states and 106039 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:25,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 18:02:25,623 INFO L93 Difference]: Finished difference Result 25205 states and 118635 transitions. [2022-03-01 18:02:25,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-01 18:02:25,624 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 18:02:25,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 18:02:25,744 INFO L225 Difference]: With dead ends: 25205 [2022-03-01 18:02:25,744 INFO L226 Difference]: Without dead ends: 25176 [2022-03-01 18:02:25,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2770 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=919, Invalid=8201, Unknown=0, NotChecked=0, Total=9120 [2022-03-01 18:02:25,745 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 1053 mSDsluCounter, 3923 mSDsCounter, 0 mSdLazyCounter, 5414 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 5634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 5414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-01 18:02:25,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1053 Valid, 1600 Invalid, 5634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 5414 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-01 18:02:25,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25176 states. [2022-03-01 18:02:26,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25176 to 22810. [2022-03-01 18:02:26,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22810 states, 22809 states have (on average 4.816169056074356) internal successors, (109852), 22809 states have internal predecessors, (109852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:26,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22810 states to 22810 states and 109852 transitions. [2022-03-01 18:02:26,601 INFO L78 Accepts]: Start accepts. Automaton has 22810 states and 109852 transitions. Word has length 33 [2022-03-01 18:02:26,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 18:02:26,601 INFO L470 AbstractCegarLoop]: Abstraction has 22810 states and 109852 transitions. [2022-03-01 18:02:26,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 18:02:26,602 INFO L276 IsEmpty]: Start isEmpty. Operand 22810 states and 109852 transitions. [2022-03-01 18:02:26,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 18:02:26,667 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 18:02:26,667 INFO L514 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] [2022-03-01 18:02:26,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Ended with exit code 0 [2022-03-01 18:02:26,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:26,882 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-03-01 18:02:26,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 18:02:26,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1137367353, now seen corresponding path program 148 times [2022-03-01 18:02:26,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 18:02:26,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152771798] [2022-03-01 18:02:26,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 18:02:26,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 18:02:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 18:02:27,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:27,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 18:02:27,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152771798] [2022-03-01 18:02:27,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152771798] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 18:02:27,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721463029] [2022-03-01 18:02:27,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 18:02:27,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 18:02:27,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 18:02:27,013 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 18:02:27,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-03-01 18:02:27,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 18:02:27,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 18:02:27,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 18:02:27,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 18:02:27,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:27,305 INFO L387 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 37 treesize of output 21 [2022-03-01 18:02:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:27,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 18:02:27,601 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-03-01 18:02:27,602 INFO L387 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 27 treesize of output 48 [2022-03-01 18:02:27,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:27,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 18:02:27,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:27,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 18:02:27,636 INFO L387 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 27 treesize of output 7 [2022-03-01 18:02:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 18:02:27,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721463029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 18:02:27,668 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 18:02:27,668 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-03-01 18:02:27,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228553291] [2022-03-01 18:02:27,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 18:02:27,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 18:02:27,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 18:02:27,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 18:02:27,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-03-01 18:02:27,669 INFO L87 Difference]: Start difference. First operand 22810 states and 109852 transitions. Second operand has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-03-01 18:02:28,930 WARN L244 SmtUtils]: Removed 13 from assertion stack [2022-03-01 18:02:28,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 18:02:28,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=235, Invalid=1835, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 18:02:28,931 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 214 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 1414 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 18:02:28,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 423 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1414 Invalid, 0 Unknown, 55 Unchecked, 0.6s Time] [2022-03-01 18:02:28,932 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (10 of 11 remaining) [2022-03-01 18:02:28,939 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 [2022-03-01 18:02:28,955 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 18:02:28,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Ended with exit code 0 [2022-03-01 18:02:29,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-03-01 18:02:29,133 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (22810states) and FLOYD_HOARE automaton (currently 27 states, 31 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 40 for 5ms.. [2022-03-01 18:02:29,134 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4INUSE_VIOLATION (9 of 11 remaining) [2022-03-01 18:02:29,134 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err6INUSE_VIOLATION (8 of 11 remaining) [2022-03-01 18:02:29,135 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (7 of 11 remaining) [2022-03-01 18:02:29,135 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7INUSE_VIOLATION (6 of 11 remaining) [2022-03-01 18:02:29,135 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err0INUSE_VIOLATION (5 of 11 remaining) [2022-03-01 18:02:29,135 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err8INUSE_VIOLATION (4 of 11 remaining) [2022-03-01 18:02:29,135 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Thread1of1ForFork1Err3INUSE_VIOLATION (3 of 11 remaining) [2022-03-01 18:02:29,135 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Thread1of1ForFork1Err5INUSE_VIOLATION (2 of 11 remaining) [2022-03-01 18:02:29,135 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Thread1of1ForFork4Err1INUSE_VIOLATION (1 of 11 remaining) [2022-03-01 18:02:29,135 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Thread1of1ForFork4Err9INUSE_VIOLATION (0 of 11 remaining) [2022-03-01 18:02:29,138 INFO L732 BasicCegarLoop]: Path program histogram: [148, 30, 29, 28, 21, 3, 2, 2, 2, 1, 1] [2022-03-01 18:02:29,148 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-01 18:02:29,148 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-01 18:02:29,149 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.03 06:02:29 BasicIcfg [2022-03-01 18:02:29,149 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-01 18:02:29,150 INFO L158 Benchmark]: Toolchain (without parser) took 878606.02ms. Allocated memory was 206.6MB in the beginning and 4.3GB in the end (delta: 4.1GB). Free memory was 171.1MB in the beginning and 3.7GB in the end (delta: -3.6GB). Peak memory consumption was 504.2MB. Max. memory is 8.0GB. [2022-03-01 18:02:29,150 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.62ms. Allocated memory is still 206.6MB. Free memory is still 172.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 18:02:29,150 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.57ms. Allocated memory is still 206.6MB. Free memory was 171.1MB in the beginning and 169.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:02:29,150 INFO L158 Benchmark]: Boogie Preprocessor took 11.26ms. Allocated memory is still 206.6MB. Free memory was 169.5MB in the beginning and 168.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 18:02:29,150 INFO L158 Benchmark]: RCFGBuilder took 297.35ms. Allocated memory is still 206.6MB. Free memory was 168.3MB in the beginning and 157.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-01 18:02:29,150 INFO L158 Benchmark]: TraceAbstraction took 878275.43ms. Allocated memory was 206.6MB in the beginning and 4.3GB in the end (delta: 4.1GB). Free memory was 157.2MB in the beginning and 3.7GB in the end (delta: -3.6GB). Peak memory consumption was 490.6MB. Max. memory is 8.0GB. [2022-03-01 18:02:29,150 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 0.62ms. Allocated memory is still 206.6MB. Free memory is still 172.3MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.57ms. Allocated memory is still 206.6MB. Free memory was 171.1MB in the beginning and 169.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 11.26ms. Allocated memory is still 206.6MB. Free memory was 169.5MB in the beginning and 168.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 297.35ms. Allocated memory is still 206.6MB. Free memory was 168.3MB in the beginning and 157.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 878275.43ms. Allocated memory was 206.6MB in the beginning and 4.3GB in the end (delta: 4.1GB). Free memory was 157.2MB in the beginning and 3.7GB in the end (delta: -3.6GB). Peak memory consumption was 490.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (22810states) and FLOYD_HOARE automaton (currently 27 states, 31 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 40 for 5ms.. - 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 constructing difference of abstraction (22810states) and FLOYD_HOARE automaton (currently 27 states, 31 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 40 for 5ms.. - 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 constructing difference of abstraction (22810states) and FLOYD_HOARE automaton (currently 27 states, 31 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 40 for 5ms.. - 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 constructing difference of abstraction (22810states) and FLOYD_HOARE automaton (currently 27 states, 31 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 40 for 5ms.. - 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 constructing difference of abstraction (22810states) and FLOYD_HOARE automaton (currently 27 states, 31 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 40 for 5ms.. - 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 constructing difference of abstraction (22810states) and FLOYD_HOARE automaton (currently 27 states, 31 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 40 for 5ms.. - 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 constructing difference of abstraction (22810states) and FLOYD_HOARE automaton (currently 27 states, 31 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 40 for 5ms.. - 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 constructing difference of abstraction (22810states) and FLOYD_HOARE automaton (currently 27 states, 31 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 40 for 5ms.. - 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 constructing difference of abstraction (22810states) and FLOYD_HOARE automaton (currently 27 states, 31 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 40 for 5ms.. - 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 constructing difference of abstraction (22810states) and FLOYD_HOARE automaton (currently 27 states, 31 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 40 for 5ms.. - 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 constructing difference of abstraction (22810states) and FLOYD_HOARE automaton (currently 27 states, 31 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 40 for 5ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 13 procedures, 76 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 878.1s, OverallIterations: 267, TraceHistogramMax: 2, PathProgramHistogramMax: 148, EmptinessCheckTime: 6.5s, AutomataDifference: 521.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 146588 SdHoareTripleChecker+Valid, 275.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 146588 mSDsluCounter, 234699 SdHoareTripleChecker+Invalid, 232.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 25565 IncrementalHoareTripleChecker+Unchecked, 575873 mSDsCounter, 23395 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 738302 IncrementalHoareTripleChecker+Invalid, 787262 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 23395 mSolverCounterUnsat, 14458 mSDtfsCounter, 738302 mSolverCounterSat, 2.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 26361 GetRequests, 11785 SyntacticMatches, 952 SemanticMatches, 13623 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255471 ImplicationChecksByTransitivity, 290.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22810occurred in iteration=266, InterpolantAutomatonStates: 10806, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 69.8s AutomataMinimizationTime, 266 MinimizatonAttempts, 361717 StatesRemovedByMinimization, 266 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.4s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 212.4s InterpolantComputationTime, 16451 NumberOfCodeBlocks, 16451 NumberOfCodeBlocksAsserted, 854 NumberOfCheckSat, 23820 ConstructedInterpolants, 377 QuantifiedInterpolants, 438289 SizeOfPredicates, 3502 NumberOfNonLiveVariables, 35503 ConjunctsInSsa, 9026 ConjunctsInUnsatCore, 791 InterpolantComputations, 5 PerfectInterpolantSequences, 82/4110 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