/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-44898dd [2022-02-09 03:00:25,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-09 03:00:25,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-09 03:00:25,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-09 03:00:25,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-09 03:00:25,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-09 03:00:25,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-09 03:00:25,168 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 [2022-02-09 03:00:25,211 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-09 03:00:25,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-09 03:00:25,211 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-09 03:00:25,211 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-09 03:00:25,212 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-09 03:00:25,212 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-09 03:00:25,212 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-09 03:00:25,212 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-09 03:00:25,212 INFO L138 SettingsManager]: * Use SBE=true [2022-02-09 03:00:25,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-09 03:00:25,213 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-09 03:00:25,213 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-09 03:00:25,213 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-09 03:00:25,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-09 03:00:25,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-09 03:00:25,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-09 03:00:25,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-09 03:00:25,213 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-09 03:00:25,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-09 03:00:25,213 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-09 03:00:25,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-09 03:00:25,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-09 03:00:25,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-09 03:00:25,214 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-09 03:00:25,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-09 03:00:25,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-09 03:00:25,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-09 03:00:25,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-09 03:00:25,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-09 03:00:25,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-09 03:00:25,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-09 03:00:25,214 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-09 03:00:25,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-09 03:00:25,215 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-09 03:00:25,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-09 03:00:25,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-09 03:00:25,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-09 03:00:25,586 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-09 03:00:25,587 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-09 03:00:25,588 INFO L432 ainManager$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 [2022-02-09 03:00:25,588 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl' [2022-02-09 03:00:25,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-09 03:00:25,637 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-09 03:00:25,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-09 03:00:25,638 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-09 03:00:25,638 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-09 03:00:25,646 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 09.02 03:00:25" (1/1) ... [2022-02-09 03:00:25,658 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 09.02 03:00:25" (1/1) ... [2022-02-09 03:00:25,664 INFO L137 Inliner]: procedures = 7, calls = 6, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-09 03:00:25,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-09 03:00:25,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-09 03:00:25,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-09 03:00:25,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-09 03:00:25,675 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 09.02 03:00:25" (1/1) ... [2022-02-09 03:00:25,675 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 09.02 03:00:25" (1/1) ... [2022-02-09 03:00:25,700 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 09.02 03:00:25" (1/1) ... [2022-02-09 03:00:25,700 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 09.02 03:00:25" (1/1) ... [2022-02-09 03:00:25,703 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 09.02 03:00:25" (1/1) ... [2022-02-09 03:00:25,705 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 09.02 03:00:25" (1/1) ... [2022-02-09 03:00:25,705 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 09.02 03:00:25" (1/1) ... [2022-02-09 03:00:25,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-09 03:00:25,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-09 03:00:25,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-09 03:00:25,707 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-09 03:00:25,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 03:00:25" (1/1) ... [2022-02-09 03:00:25,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-09 03:00:25,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:00:25,768 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) [2022-02-09 03:00:25,771 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 [2022-02-09 03:00:25,818 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-09 03:00:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-09 03:00:25,828 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-09 03:00:25,828 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-09 03:00:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-09 03:00:25,828 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-09 03:00:25,829 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-09 03:00:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-09 03:00:25,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-09 03:00:25,829 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-09 03:00:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-09 03:00:25,830 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-09 03:00:25,830 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-02-09 03:00:25,831 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-02-09 03:00:25,831 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-02-09 03:00:25,831 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2022-02-09 03:00:25,832 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2022-02-09 03:00:25,832 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2022-02-09 03:00:25,834 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2022-02-09 03:00:25,834 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2022-02-09 03:00:25,835 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2022-02-09 03:00:25,836 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-09 03:00:25,871 INFO L234 CfgBuilder]: Building ICFG [2022-02-09 03:00:25,872 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-09 03:00:25,976 INFO L275 CfgBuilder]: Performing block encoding [2022-02-09 03:00:25,990 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-09 03:00:25,991 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-02-09 03:00:25,991 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-02-09 03:00:25,991 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2022-02-09 03:00:25,991 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2022-02-09 03:00:25,992 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2022-02-09 03:00:25,993 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.02 03:00:25 BoogieIcfgContainer [2022-02-09 03:00:25,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-09 03:00:25,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-09 03:00:25,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-09 03:00:26,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-09 03:00:26,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 03:00:25" (1/2) ... [2022-02-09 03:00:26,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c08e7f8 and model type parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.02 03:00:26, skipping insertion in model container [2022-02-09 03:00:26,013 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 09.02 03:00:25" (2/2) ... [2022-02-09 03:00:26,014 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-2.wvr.bpl [2022-02-09 03:00:26,017 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-09 03:00:26,017 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-09 03:00:26,017 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-09 03:00:26,018 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-09 03:00:26,075 INFO L148 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2022-02-09 03:00:26,126 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-09 03:00:26,132 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 [2022-02-09 03:00:26,133 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-02-09 03:00:26,156 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 55 transitions, 182 flow [2022-02-09 03:00:26,211 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) [2022-02-09 03:00:26,215 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) [2022-02-09 03:00:26,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-09 03:00:26,228 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:00:26,228 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] [2022-02-09 03:00:26,228 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:00:26,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:00:26,232 INFO L85 PathProgramCache]: Analyzing trace with hash 614274337, now seen corresponding path program 1 times [2022-02-09 03:00:26,238 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:00:26,238 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539127637] [2022-02-09 03:00:26,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:26,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:00:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:26,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:00:26,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539127637] [2022-02-09 03:00:26,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539127637] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-09 03:00:26,444 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-09 03:00:26,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-09 03:00:26,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519843613] [2022-02-09 03:00:26,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-09 03:00:26,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-09 03:00:26,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:00:26,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-09 03:00:26,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-09 03:00:26,486 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) [2022-02-09 03:00:26,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:00:26,716 INFO L93 Difference]: Finished difference Result 893 states and 3368 transitions. [2022-02-09 03:00:26,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-09 03:00:26,720 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 [2022-02-09 03:00:26,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:00:26,755 INFO L225 Difference]: With dead ends: 893 [2022-02-09 03:00:26,755 INFO L226 Difference]: Without dead ends: 874 [2022-02-09 03:00:26,769 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 [2022-02-09 03:00:26,772 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 [2022-02-09 03:00:26,773 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] [2022-02-09 03:00:26,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2022-02-09 03:00:26,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 598. [2022-02-09 03:00:26,859 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) [2022-02-09 03:00:26,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 2274 transitions. [2022-02-09 03:00:26,863 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 2274 transitions. Word has length 25 [2022-02-09 03:00:26,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:00:26,864 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 2274 transitions. [2022-02-09 03:00:26,864 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) [2022-02-09 03:00:26,864 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 2274 transitions. [2022-02-09 03:00:26,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-09 03:00:26,869 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:00:26,869 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] [2022-02-09 03:00:26,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-09 03:00:26,870 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:00:26,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:00:26,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1825623495, now seen corresponding path program 2 times [2022-02-09 03:00:26,870 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:00:26,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122071728] [2022-02-09 03:00:26,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:26,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:00:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:26,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:00:26,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122071728] [2022-02-09 03:00:26,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122071728] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-09 03:00:26,987 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-09 03:00:26,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-09 03:00:26,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152580719] [2022-02-09 03:00:26,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-09 03:00:26,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-09 03:00:26,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:00:26,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-09 03:00:26,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-09 03:00:26,989 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) [2022-02-09 03:00:27,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:00:27,152 INFO L93 Difference]: Finished difference Result 872 states and 3319 transitions. [2022-02-09 03:00:27,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-09 03:00:27,152 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 [2022-02-09 03:00:27,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:00:27,158 INFO L225 Difference]: With dead ends: 872 [2022-02-09 03:00:27,158 INFO L226 Difference]: Without dead ends: 841 [2022-02-09 03:00:27,162 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 [2022-02-09 03:00:27,168 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 [2022-02-09 03:00:27,168 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] [2022-02-09 03:00:27,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-02-09 03:00:27,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 596. [2022-02-09 03:00:27,205 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) [2022-02-09 03:00:27,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 2241 transitions. [2022-02-09 03:00:27,209 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 2241 transitions. Word has length 25 [2022-02-09 03:00:27,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:00:27,209 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 2241 transitions. [2022-02-09 03:00:27,209 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) [2022-02-09 03:00:27,210 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 2241 transitions. [2022-02-09 03:00:27,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-09 03:00:27,213 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:00:27,213 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] [2022-02-09 03:00:27,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-09 03:00:27,214 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:00:27,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:00:27,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1890170752, now seen corresponding path program 1 times [2022-02-09 03:00:27,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:00:27,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055978094] [2022-02-09 03:00:27,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:27,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:00:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:27,261 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:00:27,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055978094] [2022-02-09 03:00:27,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055978094] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-09 03:00:27,261 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-09 03:00:27,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-09 03:00:27,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324151704] [2022-02-09 03:00:27,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-09 03:00:27,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-09 03:00:27,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:00:27,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-09 03:00:27,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-09 03:00:27,262 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) [2022-02-09 03:00:27,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:00:27,335 INFO L93 Difference]: Finished difference Result 867 states and 3197 transitions. [2022-02-09 03:00:27,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-09 03:00:27,335 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 [2022-02-09 03:00:27,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:00:27,340 INFO L225 Difference]: With dead ends: 867 [2022-02-09 03:00:27,340 INFO L226 Difference]: Without dead ends: 836 [2022-02-09 03:00:27,340 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 [2022-02-09 03:00:27,341 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 62 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-02-09 03:00:27,341 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] [2022-02-09 03:00:27,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-02-09 03:00:27,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 734. [2022-02-09 03:00:27,360 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) [2022-02-09 03:00:27,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2834 transitions. [2022-02-09 03:00:27,364 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2834 transitions. Word has length 27 [2022-02-09 03:00:27,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:00:27,364 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 2834 transitions. [2022-02-09 03:00:27,364 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) [2022-02-09 03:00:27,364 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2834 transitions. [2022-02-09 03:00:27,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-09 03:00:27,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:00:27,366 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] [2022-02-09 03:00:27,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-09 03:00:27,366 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:00:27,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:00:27,367 INFO L85 PathProgramCache]: Analyzing trace with hash 153525504, now seen corresponding path program 2 times [2022-02-09 03:00:27,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:00:27,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054285077] [2022-02-09 03:00:27,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:27,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:00:27,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:27,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:00:27,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054285077] [2022-02-09 03:00:27,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054285077] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-09 03:00:27,394 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-09 03:00:27,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-09 03:00:27,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850673060] [2022-02-09 03:00:27,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-09 03:00:27,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-09 03:00:27,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:00:27,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-09 03:00:27,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-09 03:00:27,396 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) [2022-02-09 03:00:27,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:00:27,454 INFO L93 Difference]: Finished difference Result 736 states and 2873 transitions. [2022-02-09 03:00:27,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-09 03:00:27,455 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 [2022-02-09 03:00:27,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:00:27,458 INFO L225 Difference]: With dead ends: 736 [2022-02-09 03:00:27,458 INFO L226 Difference]: Without dead ends: 655 [2022-02-09 03:00:27,459 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 [2022-02-09 03:00:27,459 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, 0.0s IncrementalHoareTripleChecker+Time [2022-02-09 03:00:27,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 50 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-09 03:00:27,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-02-09 03:00:27,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 571. [2022-02-09 03:00:27,473 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) [2022-02-09 03:00:27,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 2196 transitions. [2022-02-09 03:00:27,475 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 2196 transitions. Word has length 27 [2022-02-09 03:00:27,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:00:27,475 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 2196 transitions. [2022-02-09 03:00:27,475 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) [2022-02-09 03:00:27,476 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 2196 transitions. [2022-02-09 03:00:27,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-09 03:00:27,477 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:00:27,477 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] [2022-02-09 03:00:27,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-09 03:00:27,477 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:00:27,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:00:27,478 INFO L85 PathProgramCache]: Analyzing trace with hash -481159728, now seen corresponding path program 1 times [2022-02-09 03:00:27,478 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:00:27,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394572270] [2022-02-09 03:00:27,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:27,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:00:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:27,503 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:00:27,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394572270] [2022-02-09 03:00:27,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394572270] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:00:27,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448236440] [2022-02-09 03:00:27,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:27,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:00:27,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:00:27,505 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) [2022-02-09 03:00:27,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-09 03:00:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:27,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-09 03:00:27,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:00:27,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:27,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:00:27,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:27,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448236440] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:00:27,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:00:27,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-02-09 03:00:27,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830531761] [2022-02-09 03:00:27,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:00:27,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-09 03:00:27,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:00:27,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-09 03:00:27,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-09 03:00:27,679 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) [2022-02-09 03:00:27,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:00:27,741 INFO L93 Difference]: Finished difference Result 898 states and 3436 transitions. [2022-02-09 03:00:27,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-09 03:00:27,741 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 [2022-02-09 03:00:27,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:00:27,745 INFO L225 Difference]: With dead ends: 898 [2022-02-09 03:00:27,745 INFO L226 Difference]: Without dead ends: 838 [2022-02-09 03:00:27,746 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 [2022-02-09 03:00:27,746 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 [2022-02-09 03:00:27,747 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] [2022-02-09 03:00:27,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-02-09 03:00:27,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 754. [2022-02-09 03:00:27,806 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) [2022-02-09 03:00:27,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2945 transitions. [2022-02-09 03:00:27,809 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2945 transitions. Word has length 27 [2022-02-09 03:00:27,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:00:27,809 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 2945 transitions. [2022-02-09 03:00:27,809 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) [2022-02-09 03:00:27,809 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2945 transitions. [2022-02-09 03:00:27,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-09 03:00:27,812 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:00:27,812 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] [2022-02-09 03:00:27,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-09 03:00:28,027 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 [2022-02-09 03:00:28,028 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:00:28,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:00:28,028 INFO L85 PathProgramCache]: Analyzing trace with hash -522499450, now seen corresponding path program 2 times [2022-02-09 03:00:28,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:00:28,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323928589] [2022-02-09 03:00:28,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:28,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:00:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:28,054 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:00:28,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323928589] [2022-02-09 03:00:28,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323928589] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-09 03:00:28,054 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-09 03:00:28,054 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-09 03:00:28,054 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681763981] [2022-02-09 03:00:28,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-09 03:00:28,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-09 03:00:28,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:00:28,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-09 03:00:28,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-09 03:00:28,055 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) [2022-02-09 03:00:28,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:00:28,126 INFO L93 Difference]: Finished difference Result 854 states and 3195 transitions. [2022-02-09 03:00:28,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-09 03:00:28,127 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 [2022-02-09 03:00:28,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:00:28,134 INFO L225 Difference]: With dead ends: 854 [2022-02-09 03:00:28,134 INFO L226 Difference]: Without dead ends: 812 [2022-02-09 03:00:28,134 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 [2022-02-09 03:00:28,135 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, 0.1s IncrementalHoareTripleChecker+Time [2022-02-09 03:00:28,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 52 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-09 03:00:28,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-02-09 03:00:28,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 733. [2022-02-09 03:00:28,160 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) [2022-02-09 03:00:28,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2865 transitions. [2022-02-09 03:00:28,164 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2865 transitions. Word has length 27 [2022-02-09 03:00:28,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:00:28,164 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 2865 transitions. [2022-02-09 03:00:28,165 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) [2022-02-09 03:00:28,165 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2865 transitions. [2022-02-09 03:00:28,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:00:28,167 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:00:28,168 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] [2022-02-09 03:00:28,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-09 03:00:28,168 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:00:28,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:00:28,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1959647599, now seen corresponding path program 1 times [2022-02-09 03:00:28,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:00:28,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758295604] [2022-02-09 03:00:28,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:28,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:00:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:28,421 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:00:28,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758295604] [2022-02-09 03:00:28,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758295604] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:00:28,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012460512] [2022-02-09 03:00:28,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:28,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:00:28,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:00:28,436 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) [2022-02-09 03:00:28,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-09 03:00:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:28,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:00:28,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:00:28,857 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 [2022-02-09 03:00:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:28,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:00:29,160 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:00:29,161 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 [2022-02-09 03:00:29,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:00:29,181 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 [2022-02-09 03:00:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:29,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012460512] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:00:29,255 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:00:29,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-09 03:00:29,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170768625] [2022-02-09 03:00:29,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:00:29,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-09 03:00:29,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:00:29,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-09 03:00:29,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-02-09 03:00:29,257 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) [2022-02-09 03:00:30,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:00:30,500 INFO L93 Difference]: Finished difference Result 1214 states and 4693 transitions. [2022-02-09 03:00:30,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-09 03:00:30,501 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 [2022-02-09 03:00:30,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:00:30,507 INFO L225 Difference]: With dead ends: 1214 [2022-02-09 03:00:30,507 INFO L226 Difference]: Without dead ends: 1195 [2022-02-09 03:00:30,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-02-09 03:00:30,510 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 346 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:00:30,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 452 Invalid, 1622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1581 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-09 03:00:30,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-02-09 03:00:30,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 839. [2022-02-09 03:00:30,534 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) [2022-02-09 03:00:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 3275 transitions. [2022-02-09 03:00:30,538 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 3275 transitions. Word has length 29 [2022-02-09 03:00:30,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:00:30,539 INFO L470 AbstractCegarLoop]: Abstraction has 839 states and 3275 transitions. [2022-02-09 03:00:30,539 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) [2022-02-09 03:00:30,539 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 3275 transitions. [2022-02-09 03:00:30,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:00:30,542 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:00:30,542 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] [2022-02-09 03:00:30,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-09 03:00:30,765 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 [2022-02-09 03:00:30,766 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:00:30,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:00:30,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1724936761, now seen corresponding path program 2 times [2022-02-09 03:00:30,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:00:30,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982086188] [2022-02-09 03:00:30,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:30,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:00:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:30,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:30,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:00:30,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982086188] [2022-02-09 03:00:30,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982086188] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:00:30,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311641353] [2022-02-09 03:00:30,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:00:30,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:00:30,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:00:30,919 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) [2022-02-09 03:00:30,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-09 03:00:30,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:00:30,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:00:30,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:00:30,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:00:31,183 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:00:31,184 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 [2022-02-09 03:00:31,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:31,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:00:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:31,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311641353] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:00:31,561 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:00:31,562 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-09 03:00:31,562 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235840238] [2022-02-09 03:00:31,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:00:31,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:00:31,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:00:31,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:00:31,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:00:31,563 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) [2022-02-09 03:00:32,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:00:32,128 INFO L93 Difference]: Finished difference Result 1161 states and 4488 transitions. [2022-02-09 03:00:32,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-09 03:00:32,129 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 [2022-02-09 03:00:32,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:00:32,139 INFO L225 Difference]: With dead ends: 1161 [2022-02-09 03:00:32,139 INFO L226 Difference]: Without dead ends: 1142 [2022-02-09 03:00:32,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-02-09 03:00:32,140 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:00:32,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 291 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:00:32,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-02-09 03:00:32,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 842. [2022-02-09 03:00:32,165 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) [2022-02-09 03:00:32,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 3285 transitions. [2022-02-09 03:00:32,170 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 3285 transitions. Word has length 29 [2022-02-09 03:00:32,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:00:32,171 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 3285 transitions. [2022-02-09 03:00:32,172 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) [2022-02-09 03:00:32,172 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 3285 transitions. [2022-02-09 03:00:32,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:00:32,176 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:00:32,176 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] [2022-02-09 03:00:32,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-09 03:00:32,395 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 [2022-02-09 03:00:32,396 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:00:32,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:00:32,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1161339337, now seen corresponding path program 3 times [2022-02-09 03:00:32,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:00:32,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701044998] [2022-02-09 03:00:32,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:32,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:00:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:32,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:00:32,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701044998] [2022-02-09 03:00:32,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701044998] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:00:32,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732975363] [2022-02-09 03:00:32,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:00:32,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:00:32,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:00:32,600 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) [2022-02-09 03:00:32,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-09 03:00:32,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-09 03:00:32,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:00:32,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:00:32,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:00:32,862 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:00:32,863 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 [2022-02-09 03:00:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:33,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:00:33,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:33,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732975363] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:00:33,193 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:00:33,193 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-09 03:00:33,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678248495] [2022-02-09 03:00:33,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:00:33,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:00:33,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:00:33,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:00:33,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:00:33,195 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) [2022-02-09 03:00:33,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:00:33,818 INFO L93 Difference]: Finished difference Result 1188 states and 4549 transitions. [2022-02-09 03:00:33,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-09 03:00:33,818 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 [2022-02-09 03:00:33,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:00:33,824 INFO L225 Difference]: With dead ends: 1188 [2022-02-09 03:00:33,825 INFO L226 Difference]: Without dead ends: 1169 [2022-02-09 03:00:33,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-02-09 03:00:33,826 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 198 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:00:33,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 330 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:00:33,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-02-09 03:00:33,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 850. [2022-02-09 03:00:33,849 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) [2022-02-09 03:00:33,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 3307 transitions. [2022-02-09 03:00:33,852 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 3307 transitions. Word has length 29 [2022-02-09 03:00:33,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:00:33,852 INFO L470 AbstractCegarLoop]: Abstraction has 850 states and 3307 transitions. [2022-02-09 03:00:33,852 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) [2022-02-09 03:00:33,853 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 3307 transitions. [2022-02-09 03:00:33,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:00:33,855 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:00:33,856 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] [2022-02-09 03:00:33,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-09 03:00:34,062 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 [2022-02-09 03:00:34,063 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:00:34,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:00:34,063 INFO L85 PathProgramCache]: Analyzing trace with hash 790114331, now seen corresponding path program 4 times [2022-02-09 03:00:34,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:00:34,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030932599] [2022-02-09 03:00:34,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:34,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:00:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:34,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:00:34,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030932599] [2022-02-09 03:00:34,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030932599] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:00:34,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317360043] [2022-02-09 03:00:34,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:00:34,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:00:34,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:00:34,204 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) [2022-02-09 03:00:34,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-09 03:00:34,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:00:34,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:00:34,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:00:34,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:00:34,455 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 [2022-02-09 03:00:34,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:34,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:00:34,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:00:34,766 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 [2022-02-09 03:00:34,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:00:34,779 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 [2022-02-09 03:00:34,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:34,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317360043] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:00:34,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:00:34,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:00:34,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930482538] [2022-02-09 03:00:34,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:00:34,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:00:34,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:00:34,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:00:34,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:00:34,839 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) [2022-02-09 03:00:35,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:00:35,931 INFO L93 Difference]: Finished difference Result 1755 states and 6735 transitions. [2022-02-09 03:00:35,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-09 03:00:35,931 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 [2022-02-09 03:00:35,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:00:35,943 INFO L225 Difference]: With dead ends: 1755 [2022-02-09 03:00:35,943 INFO L226 Difference]: Without dead ends: 1727 [2022-02-09 03:00:35,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2022-02-09 03:00:35,944 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 316 mSDsluCounter, 1369 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:00:35,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 540 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1811 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-09 03:00:35,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2022-02-09 03:00:35,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 963. [2022-02-09 03:00:35,980 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) [2022-02-09 03:00:35,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3864 transitions. [2022-02-09 03:00:35,985 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3864 transitions. Word has length 29 [2022-02-09 03:00:35,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:00:35,985 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 3864 transitions. [2022-02-09 03:00:35,986 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) [2022-02-09 03:00:35,986 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3864 transitions. [2022-02-09 03:00:35,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:00:35,989 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:00:35,989 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] [2022-02-09 03:00:36,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-02-09 03:00:36,212 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 [2022-02-09 03:00:36,213 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:00:36,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:00:36,213 INFO L85 PathProgramCache]: Analyzing trace with hash -2099674321, now seen corresponding path program 5 times [2022-02-09 03:00:36,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:00:36,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094015741] [2022-02-09 03:00:36,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:36,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:00:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:36,392 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:00:36,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094015741] [2022-02-09 03:00:36,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094015741] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:00:36,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075844019] [2022-02-09 03:00:36,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:00:36,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:00:36,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:00:36,394 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) [2022-02-09 03:00:36,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-09 03:00:36,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:00:36,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:00:36,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-09 03:00:36,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:00:36,694 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 [2022-02-09 03:00:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:36,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:00:37,038 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:00:37,038 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 [2022-02-09 03:00:37,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:00:37,069 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 [2022-02-09 03:00:37,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:37,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075844019] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:00:37,130 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:00:37,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 22 [2022-02-09 03:00:37,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528571606] [2022-02-09 03:00:37,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:00:37,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-09 03:00:37,131 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:00:37,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-09 03:00:37,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-02-09 03:00:37,132 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) [2022-02-09 03:00:38,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:00:38,826 INFO L93 Difference]: Finished difference Result 2261 states and 8768 transitions. [2022-02-09 03:00:38,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-09 03:00:38,826 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 [2022-02-09 03:00:38,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:00:38,837 INFO L225 Difference]: With dead ends: 2261 [2022-02-09 03:00:38,838 INFO L226 Difference]: Without dead ends: 2188 [2022-02-09 03:00:38,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=340, Invalid=2312, Unknown=0, NotChecked=0, Total=2652 [2022-02-09 03:00:38,839 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 [2022-02-09 03:00:38,839 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] [2022-02-09 03:00:38,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2022-02-09 03:00:38,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 947. [2022-02-09 03:00:38,866 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) [2022-02-09 03:00:38,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3811 transitions. [2022-02-09 03:00:38,870 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3811 transitions. Word has length 29 [2022-02-09 03:00:38,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:00:38,870 INFO L470 AbstractCegarLoop]: Abstraction has 947 states and 3811 transitions. [2022-02-09 03:00:38,870 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) [2022-02-09 03:00:38,870 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3811 transitions. [2022-02-09 03:00:38,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:00:38,872 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:00:38,872 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] [2022-02-09 03:00:38,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-09 03:00:39,095 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 [2022-02-09 03:00:39,096 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:00:39,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:00:39,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1181516803, now seen corresponding path program 6 times [2022-02-09 03:00:39,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:00:39,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951432727] [2022-02-09 03:00:39,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:39,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:00:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:39,264 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:00:39,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951432727] [2022-02-09 03:00:39,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951432727] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:00:39,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392122253] [2022-02-09 03:00:39,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:00:39,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:00:39,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:00:39,279 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) [2022-02-09 03:00:39,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-09 03:00:39,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-09 03:00:39,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:00:39,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-09 03:00:39,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:00:39,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:00:39,394 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 [2022-02-09 03:00:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:39,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:00:39,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:39,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392122253] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:00:39,751 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:00:39,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-09 03:00:39,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427496213] [2022-02-09 03:00:39,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:00:39,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-09 03:00:39,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:00:39,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-09 03:00:39,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-02-09 03:00:39,753 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) [2022-02-09 03:00:40,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:00:40,142 INFO L93 Difference]: Finished difference Result 1340 states and 5308 transitions. [2022-02-09 03:00:40,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-09 03:00:40,142 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 [2022-02-09 03:00:40,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:00:40,161 INFO L225 Difference]: With dead ends: 1340 [2022-02-09 03:00:40,161 INFO L226 Difference]: Without dead ends: 1321 [2022-02-09 03:00:40,162 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 [2022-02-09 03:00:40,163 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 [2022-02-09 03:00:40,163 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] [2022-02-09 03:00:40,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2022-02-09 03:00:40,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1034. [2022-02-09 03:00:40,208 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) [2022-02-09 03:00:40,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 4213 transitions. [2022-02-09 03:00:40,212 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 4213 transitions. Word has length 29 [2022-02-09 03:00:40,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:00:40,212 INFO L470 AbstractCegarLoop]: Abstraction has 1034 states and 4213 transitions. [2022-02-09 03:00:40,212 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) [2022-02-09 03:00:40,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 4213 transitions. [2022-02-09 03:00:40,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:00:40,215 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:00:40,215 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] [2022-02-09 03:00:40,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-09 03:00:40,429 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 [2022-02-09 03:00:40,430 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:00:40,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:00:40,430 INFO L85 PathProgramCache]: Analyzing trace with hash 121755803, now seen corresponding path program 7 times [2022-02-09 03:00:40,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:00:40,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990134545] [2022-02-09 03:00:40,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:40,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:00:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:40,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:00:40,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990134545] [2022-02-09 03:00:40,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990134545] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:00:40,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088506725] [2022-02-09 03:00:40,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:00:40,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:00:40,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:00:40,556 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) [2022-02-09 03:00:40,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-09 03:00:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:40,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:00:40,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:00:40,734 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 [2022-02-09 03:00:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:40,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:00:40,984 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:00:40,984 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 [2022-02-09 03:00:40,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:00:40,994 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 [2022-02-09 03:00:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:41,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088506725] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:00:41,034 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:00:41,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:00:41,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968034304] [2022-02-09 03:00:41,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:00:41,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:00:41,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:00:41,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:00:41,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:00:41,036 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) [2022-02-09 03:00:41,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:00:41,791 INFO L93 Difference]: Finished difference Result 1788 states and 6981 transitions. [2022-02-09 03:00:41,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-09 03:00:41,792 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 [2022-02-09 03:00:41,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:00:41,798 INFO L225 Difference]: With dead ends: 1788 [2022-02-09 03:00:41,799 INFO L226 Difference]: Without dead ends: 1760 [2022-02-09 03:00:41,799 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 [2022-02-09 03:00:41,800 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 [2022-02-09 03:00:41,800 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] [2022-02-09 03:00:41,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2022-02-09 03:00:41,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1124. [2022-02-09 03:00:41,828 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) [2022-02-09 03:00:41,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 4650 transitions. [2022-02-09 03:00:41,832 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 4650 transitions. Word has length 29 [2022-02-09 03:00:41,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:00:41,833 INFO L470 AbstractCegarLoop]: Abstraction has 1124 states and 4650 transitions. [2022-02-09 03:00:41,833 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) [2022-02-09 03:00:41,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 4650 transitions. [2022-02-09 03:00:41,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:00:41,836 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:00:41,836 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] [2022-02-09 03:00:41,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-09 03:00:42,051 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 [2022-02-09 03:00:42,051 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:00:42,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:00:42,052 INFO L85 PathProgramCache]: Analyzing trace with hash 68369283, now seen corresponding path program 8 times [2022-02-09 03:00:42,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:00:42,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963951095] [2022-02-09 03:00:42,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:42,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:00:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:42,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:00:42,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963951095] [2022-02-09 03:00:42,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963951095] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:00:42,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726634231] [2022-02-09 03:00:42,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:00:42,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:00:42,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:00:42,164 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) [2022-02-09 03:00:42,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-09 03:00:42,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:00:42,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:00:42,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:00:42,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:00:42,384 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:00:42,384 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 [2022-02-09 03:00:42,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:42,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:00:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:42,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726634231] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:00:42,771 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:00:42,771 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-02-09 03:00:42,771 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137832751] [2022-02-09 03:00:42,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:00:42,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:00:42,771 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:00:42,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:00:42,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:00:42,772 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) [2022-02-09 03:00:43,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:00:43,324 INFO L93 Difference]: Finished difference Result 1434 states and 5758 transitions. [2022-02-09 03:00:43,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-09 03:00:43,324 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 [2022-02-09 03:00:43,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:00:43,328 INFO L225 Difference]: With dead ends: 1434 [2022-02-09 03:00:43,329 INFO L226 Difference]: Without dead ends: 1411 [2022-02-09 03:00:43,329 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 [2022-02-09 03:00:43,329 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 [2022-02-09 03:00:43,330 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] [2022-02-09 03:00:43,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2022-02-09 03:00:43,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1084. [2022-02-09 03:00:43,368 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) [2022-02-09 03:00:43,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 4475 transitions. [2022-02-09 03:00:43,373 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 4475 transitions. Word has length 29 [2022-02-09 03:00:43,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:00:43,373 INFO L470 AbstractCegarLoop]: Abstraction has 1084 states and 4475 transitions. [2022-02-09 03:00:43,373 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) [2022-02-09 03:00:43,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 4475 transitions. [2022-02-09 03:00:43,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:00:43,376 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:00:43,376 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] [2022-02-09 03:00:43,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-09 03:00:43,590 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 [2022-02-09 03:00:43,591 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:00:43,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:00:43,591 INFO L85 PathProgramCache]: Analyzing trace with hash 2131198379, now seen corresponding path program 9 times [2022-02-09 03:00:43,591 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:00:43,591 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88808425] [2022-02-09 03:00:43,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:43,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:00:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:43,738 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:00:43,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88808425] [2022-02-09 03:00:43,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88808425] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:00:43,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111555619] [2022-02-09 03:00:43,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:00:43,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:00:43,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:00:43,760 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) [2022-02-09 03:00:43,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-09 03:00:43,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-09 03:00:43,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:00:43,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-09 03:00:43,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:00:43,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:00:43,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-02-09 03:00:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:44,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:00:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:44,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111555619] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:00:44,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:00:44,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-09 03:00:44,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015880447] [2022-02-09 03:00:44,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:00:44,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-09 03:00:44,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:00:44,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-09 03:00:44,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-02-09 03:00:44,296 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) [2022-02-09 03:00:44,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:00:44,761 INFO L93 Difference]: Finished difference Result 1290 states and 5264 transitions. [2022-02-09 03:00:44,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-09 03:00:44,761 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 [2022-02-09 03:00:44,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:00:44,765 INFO L225 Difference]: With dead ends: 1290 [2022-02-09 03:00:44,765 INFO L226 Difference]: Without dead ends: 1275 [2022-02-09 03:00:44,766 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 [2022-02-09 03:00:44,766 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:00:44,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 315 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:00:44,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-02-09 03:00:44,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1090. [2022-02-09 03:00:44,795 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) [2022-02-09 03:00:44,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 4492 transitions. [2022-02-09 03:00:44,798 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 4492 transitions. Word has length 29 [2022-02-09 03:00:44,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:00:44,799 INFO L470 AbstractCegarLoop]: Abstraction has 1090 states and 4492 transitions. [2022-02-09 03:00:44,799 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) [2022-02-09 03:00:44,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 4492 transitions. [2022-02-09 03:00:44,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:00:44,801 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:00:44,801 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] [2022-02-09 03:00:44,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-09 03:00:45,017 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 [2022-02-09 03:00:45,018 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:00:45,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:00:45,018 INFO L85 PathProgramCache]: Analyzing trace with hash -79176119, now seen corresponding path program 10 times [2022-02-09 03:00:45,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:00:45,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350696925] [2022-02-09 03:00:45,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:45,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:00:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:45,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:45,135 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:00:45,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350696925] [2022-02-09 03:00:45,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350696925] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:00:45,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115546941] [2022-02-09 03:00:45,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:00:45,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:00:45,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:00:45,136 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) [2022-02-09 03:00:45,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-09 03:00:45,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:00:45,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:00:45,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:00:45,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:00:45,356 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 [2022-02-09 03:00:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:45,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:00:45,658 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:00:45,658 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 [2022-02-09 03:00:45,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:00:45,670 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 [2022-02-09 03:00:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:45,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115546941] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:00:45,721 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:00:45,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:00:45,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927100952] [2022-02-09 03:00:45,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:00:45,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:00:45,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:00:45,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:00:45,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:00:45,722 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) [2022-02-09 03:00:46,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:00:46,562 INFO L93 Difference]: Finished difference Result 1640 states and 6539 transitions. [2022-02-09 03:00:46,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-09 03:00:46,562 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 [2022-02-09 03:00:46,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:00:46,567 INFO L225 Difference]: With dead ends: 1640 [2022-02-09 03:00:46,567 INFO L226 Difference]: Without dead ends: 1616 [2022-02-09 03:00:46,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:00:46,568 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 338 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:00:46,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 424 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 03:00:46,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2022-02-09 03:00:46,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1094. [2022-02-09 03:00:46,587 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) [2022-02-09 03:00:46,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 4506 transitions. [2022-02-09 03:00:46,590 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 4506 transitions. Word has length 29 [2022-02-09 03:00:46,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:00:46,590 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 4506 transitions. [2022-02-09 03:00:46,590 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) [2022-02-09 03:00:46,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 4506 transitions. [2022-02-09 03:00:46,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:00:46,592 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:00:46,592 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] [2022-02-09 03:00:46,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-09 03:00:46,809 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 [2022-02-09 03:00:46,809 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:00:46,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:00:46,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1082425977, now seen corresponding path program 11 times [2022-02-09 03:00:46,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:00:46,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934061221] [2022-02-09 03:00:46,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:46,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:00:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:46,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:00:46,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934061221] [2022-02-09 03:00:46,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934061221] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:00:46,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634589900] [2022-02-09 03:00:46,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:00:46,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:00:46,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:00:46,946 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) [2022-02-09 03:00:46,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-09 03:00:46,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-09 03:00:46,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:00:46,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-09 03:00:46,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:00:47,180 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-02-09 03:00:47,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:47,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:00:47,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:00:47,531 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 [2022-02-09 03:00:47,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:00:47,545 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 [2022-02-09 03:00:47,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:47,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634589900] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:00:47,599 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:00:47,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 21 [2022-02-09 03:00:47,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971057909] [2022-02-09 03:00:47,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:00:47,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-09 03:00:47,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:00:47,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-09 03:00:47,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-02-09 03:00:47,600 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) [2022-02-09 03:00:48,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:00:48,598 INFO L93 Difference]: Finished difference Result 2131 states and 8371 transitions. [2022-02-09 03:00:48,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-09 03:00:48,599 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 [2022-02-09 03:00:48,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:00:48,633 INFO L225 Difference]: With dead ends: 2131 [2022-02-09 03:00:48,634 INFO L226 Difference]: Without dead ends: 2093 [2022-02-09 03:00:48,634 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 [2022-02-09 03:00:48,635 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 504 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 1771 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-02-09 03:00:48,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 512 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1771 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-09 03:00:48,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2022-02-09 03:00:48,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 1262. [2022-02-09 03:00:48,673 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) [2022-02-09 03:00:48,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 5306 transitions. [2022-02-09 03:00:48,678 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 5306 transitions. Word has length 29 [2022-02-09 03:00:48,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:00:48,678 INFO L470 AbstractCegarLoop]: Abstraction has 1262 states and 5306 transitions. [2022-02-09 03:00:48,678 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) [2022-02-09 03:00:48,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 5306 transitions. [2022-02-09 03:00:48,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:00:48,681 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:00:48,681 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] [2022-02-09 03:00:48,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-02-09 03:00:48,895 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 [2022-02-09 03:00:48,896 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:00:48,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:00:48,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1909268713, now seen corresponding path program 12 times [2022-02-09 03:00:48,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:00:48,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599287687] [2022-02-09 03:00:48,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:48,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:00:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:48,988 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:00:48,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599287687] [2022-02-09 03:00:48,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599287687] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:00:48,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665996149] [2022-02-09 03:00:48,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:00:48,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:00:48,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:00:48,991 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) [2022-02-09 03:00:48,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-09 03:00:49,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-09 03:00:49,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:00:49,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-09 03:00:49,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:00:49,097 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:00:49,098 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 [2022-02-09 03:00:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:49,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:00:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:49,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665996149] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:00:49,324 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:00:49,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 18 [2022-02-09 03:00:49,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605629082] [2022-02-09 03:00:49,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:00:49,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-09 03:00:49,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:00:49,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-09 03:00:49,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-02-09 03:00:49,334 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) [2022-02-09 03:00:49,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:00:49,552 INFO L93 Difference]: Finished difference Result 1616 states and 6533 transitions. [2022-02-09 03:00:49,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-09 03:00:49,553 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 [2022-02-09 03:00:49,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:00:49,610 INFO L225 Difference]: With dead ends: 1616 [2022-02-09 03:00:49,610 INFO L226 Difference]: Without dead ends: 1603 [2022-02-09 03:00:49,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-02-09 03:00:49,611 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 194 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-02-09 03:00:49,611 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] [2022-02-09 03:00:49,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2022-02-09 03:00:49,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1262. [2022-02-09 03:00:49,631 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) [2022-02-09 03:00:49,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 5303 transitions. [2022-02-09 03:00:49,635 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 5303 transitions. Word has length 29 [2022-02-09 03:00:49,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:00:49,635 INFO L470 AbstractCegarLoop]: Abstraction has 1262 states and 5303 transitions. [2022-02-09 03:00:49,636 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) [2022-02-09 03:00:49,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 5303 transitions. [2022-02-09 03:00:49,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:00:49,638 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:00:49,638 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] [2022-02-09 03:00:49,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-09 03:00:49,869 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 [2022-02-09 03:00:49,870 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:00:49,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:00:49,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1486336511, now seen corresponding path program 13 times [2022-02-09 03:00:49,870 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:00:49,870 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444380915] [2022-02-09 03:00:49,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:49,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:00:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:49,979 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:00:49,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444380915] [2022-02-09 03:00:49,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444380915] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:00:49,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175803868] [2022-02-09 03:00:49,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:00:49,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:00:49,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:00:49,980 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) [2022-02-09 03:00:49,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-09 03:00:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:50,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:00:50,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:00:50,128 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 [2022-02-09 03:00:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:50,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:00:50,366 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:00:50,366 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 [2022-02-09 03:00:50,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:00:50,377 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-02-09 03:00:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:50,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175803868] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:00:50,428 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:00:50,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-02-09 03:00:50,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515653679] [2022-02-09 03:00:50,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:00:50,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:00:50,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:00:50,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:00:50,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:00:50,429 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) [2022-02-09 03:00:51,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:00:51,408 INFO L93 Difference]: Finished difference Result 2003 states and 7967 transitions. [2022-02-09 03:00:51,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-09 03:00:51,408 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 [2022-02-09 03:00:51,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:00:51,413 INFO L225 Difference]: With dead ends: 2003 [2022-02-09 03:00:51,414 INFO L226 Difference]: Without dead ends: 1957 [2022-02-09 03:00:51,414 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 [2022-02-09 03:00:51,414 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 [2022-02-09 03:00:51,415 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] [2022-02-09 03:00:51,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2022-02-09 03:00:51,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1229. [2022-02-09 03:00:51,439 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) [2022-02-09 03:00:51,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 5149 transitions. [2022-02-09 03:00:51,443 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 5149 transitions. Word has length 29 [2022-02-09 03:00:51,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:00:51,443 INFO L470 AbstractCegarLoop]: Abstraction has 1229 states and 5149 transitions. [2022-02-09 03:00:51,443 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) [2022-02-09 03:00:51,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 5149 transitions. [2022-02-09 03:00:51,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:00:51,446 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:00:51,446 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] [2022-02-09 03:00:51,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-02-09 03:00:51,666 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 [2022-02-09 03:00:51,667 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:00:51,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:00:51,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1601658297, now seen corresponding path program 14 times [2022-02-09 03:00:51,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:00:51,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55619405] [2022-02-09 03:00:51,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:51,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:00:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:51,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:51,872 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:00:51,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55619405] [2022-02-09 03:00:51,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55619405] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:00:51,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645753301] [2022-02-09 03:00:51,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:00:51,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:00:51,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:00:51,873 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) [2022-02-09 03:00:51,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-09 03:00:51,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:00:51,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:00:51,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:00:51,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:00:52,076 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:00:52,076 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 [2022-02-09 03:00:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:52,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:00:52,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:52,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645753301] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:00:52,483 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:00:52,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-09 03:00:52,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210065889] [2022-02-09 03:00:52,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:00:52,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:00:52,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:00:52,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:00:52,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:00:52,485 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) [2022-02-09 03:00:53,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:00:53,047 INFO L93 Difference]: Finished difference Result 1449 states and 5983 transitions. [2022-02-09 03:00:53,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-09 03:00:53,048 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 [2022-02-09 03:00:53,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:00:53,051 INFO L225 Difference]: With dead ends: 1449 [2022-02-09 03:00:53,051 INFO L226 Difference]: Without dead ends: 1430 [2022-02-09 03:00:53,052 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 [2022-02-09 03:00:53,053 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 [2022-02-09 03:00:53,053 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] [2022-02-09 03:00:53,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2022-02-09 03:00:53,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1214. [2022-02-09 03:00:53,082 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) [2022-02-09 03:00:53,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 5090 transitions. [2022-02-09 03:00:53,086 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 5090 transitions. Word has length 29 [2022-02-09 03:00:53,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:00:53,086 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 5090 transitions. [2022-02-09 03:00:53,086 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) [2022-02-09 03:00:53,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 5090 transitions. [2022-02-09 03:00:53,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:00:53,089 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:00:53,089 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] [2022-02-09 03:00:53,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-09 03:00:53,306 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 [2022-02-09 03:00:53,307 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:00:53,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:00:53,307 INFO L85 PathProgramCache]: Analyzing trace with hash -801130063, now seen corresponding path program 1 times [2022-02-09 03:00:53,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:00:53,307 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502761544] [2022-02-09 03:00:53,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:53,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:00:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:53,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:53,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:00:53,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502761544] [2022-02-09 03:00:53,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502761544] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:00:53,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730819927] [2022-02-09 03:00:53,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:53,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:00:53,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:00:53,433 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) [2022-02-09 03:00:53,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-09 03:00:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:53,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:00:53,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:00:53,606 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 [2022-02-09 03:00:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:53,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:00:53,880 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:00:53,880 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 [2022-02-09 03:00:53,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:00:53,890 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 [2022-02-09 03:00:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:53,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730819927] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:00:53,938 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:00:53,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-02-09 03:00:53,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922052904] [2022-02-09 03:00:53,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:00:53,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:00:53,939 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:00:53,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:00:53,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:00:53,939 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) [2022-02-09 03:00:54,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:00:54,942 INFO L93 Difference]: Finished difference Result 2164 states and 8762 transitions. [2022-02-09 03:00:54,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-09 03:00:54,942 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 [2022-02-09 03:00:54,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:00:54,948 INFO L225 Difference]: With dead ends: 2164 [2022-02-09 03:00:54,948 INFO L226 Difference]: Without dead ends: 2126 [2022-02-09 03:00:54,948 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 [2022-02-09 03:00:54,949 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 [2022-02-09 03:00:54,949 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] [2022-02-09 03:00:54,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2022-02-09 03:00:54,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1426. [2022-02-09 03:00:54,978 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) [2022-02-09 03:00:54,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 6084 transitions. [2022-02-09 03:00:54,983 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 6084 transitions. Word has length 29 [2022-02-09 03:00:54,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:00:54,983 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 6084 transitions. [2022-02-09 03:00:54,983 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) [2022-02-09 03:00:54,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 6084 transitions. [2022-02-09 03:00:54,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:00:54,987 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:00:54,987 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] [2022-02-09 03:00:55,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-09 03:00:55,204 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 [2022-02-09 03:00:55,205 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:00:55,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:00:55,205 INFO L85 PathProgramCache]: Analyzing trace with hash 621224763, now seen corresponding path program 2 times [2022-02-09 03:00:55,206 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:00:55,206 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067809311] [2022-02-09 03:00:55,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:55,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:00:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:55,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:00:55,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067809311] [2022-02-09 03:00:55,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067809311] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:00:55,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294028538] [2022-02-09 03:00:55,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:00:55,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:00:55,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:00:55,331 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) [2022-02-09 03:00:55,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-09 03:00:55,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:00:55,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:00:55,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:00:55,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:00:55,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:00:55,507 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 [2022-02-09 03:00:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:55,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:00:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:55,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294028538] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:00:55,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:00:55,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-02-09 03:00:55,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337702626] [2022-02-09 03:00:55,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:00:55,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:00:55,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:00:55,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:00:55,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:00:55,923 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) [2022-02-09 03:00:56,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:00:56,605 INFO L93 Difference]: Finished difference Result 1744 states and 7265 transitions. [2022-02-09 03:00:56,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-09 03:00:56,605 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 [2022-02-09 03:00:56,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:00:56,609 INFO L225 Difference]: With dead ends: 1744 [2022-02-09 03:00:56,609 INFO L226 Difference]: Without dead ends: 1731 [2022-02-09 03:00:56,610 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 [2022-02-09 03:00:56,610 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 [2022-02-09 03:00:56,610 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] [2022-02-09 03:00:56,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2022-02-09 03:00:56,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1426. [2022-02-09 03:00:56,635 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) [2022-02-09 03:00:56,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 6081 transitions. [2022-02-09 03:00:56,640 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 6081 transitions. Word has length 29 [2022-02-09 03:00:56,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:00:56,640 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 6081 transitions. [2022-02-09 03:00:56,640 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) [2022-02-09 03:00:56,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 6081 transitions. [2022-02-09 03:00:56,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:00:56,644 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:00:56,644 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] [2022-02-09 03:00:56,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-09 03:00:56,860 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 [2022-02-09 03:00:56,860 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:00:56,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:00:56,861 INFO L85 PathProgramCache]: Analyzing trace with hash 176122743, now seen corresponding path program 3 times [2022-02-09 03:00:56,861 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:00:56,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768477895] [2022-02-09 03:00:56,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:56,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:00:56,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:56,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:56,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:00:56,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768477895] [2022-02-09 03:00:56,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768477895] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:00:56,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983592416] [2022-02-09 03:00:56,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:00:56,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:00:56,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:00:56,993 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) [2022-02-09 03:00:56,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-09 03:00:57,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-09 03:00:57,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:00:57,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-09 03:00:57,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:00:57,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:00:57,128 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 [2022-02-09 03:00:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:57,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:00:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:57,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983592416] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:00:57,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:00:57,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-09 03:00:57,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979402269] [2022-02-09 03:00:57,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:00:57,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-09 03:00:57,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:00:57,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-09 03:00:57,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-02-09 03:00:57,462 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) [2022-02-09 03:00:57,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:00:57,952 INFO L93 Difference]: Finished difference Result 1768 states and 7335 transitions. [2022-02-09 03:00:57,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-09 03:00:57,952 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 [2022-02-09 03:00:57,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:00:57,957 INFO L225 Difference]: With dead ends: 1768 [2022-02-09 03:00:57,957 INFO L226 Difference]: Without dead ends: 1740 [2022-02-09 03:00:57,957 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 [2022-02-09 03:00:57,957 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:00:57,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 240 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:00:57,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2022-02-09 03:00:57,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1383. [2022-02-09 03:00:57,987 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) [2022-02-09 03:00:57,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 5900 transitions. [2022-02-09 03:00:57,992 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 5900 transitions. Word has length 29 [2022-02-09 03:00:57,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:00:57,992 INFO L470 AbstractCegarLoop]: Abstraction has 1383 states and 5900 transitions. [2022-02-09 03:00:57,996 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) [2022-02-09 03:00:57,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 5900 transitions. [2022-02-09 03:00:57,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:00:57,999 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:00:57,999 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] [2022-02-09 03:00:58,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-09 03:00:58,217 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 [2022-02-09 03:00:58,217 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:00:58,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:00:58,217 INFO L85 PathProgramCache]: Analyzing trace with hash 660102987, now seen corresponding path program 4 times [2022-02-09 03:00:58,217 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:00:58,218 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898923976] [2022-02-09 03:00:58,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:00:58,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:00:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:00:58,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:58,348 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:00:58,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898923976] [2022-02-09 03:00:58,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898923976] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:00:58,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992925800] [2022-02-09 03:00:58,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:00:58,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:00:58,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:00:58,349 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) [2022-02-09 03:00:58,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-09 03:00:58,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:00:58,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:00:58,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:00:58,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:00:58,545 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 [2022-02-09 03:00:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:58,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:00:58,884 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:00:58,884 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 [2022-02-09 03:00:58,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:00:58,905 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 [2022-02-09 03:00:58,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:00:58,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992925800] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:00:58,959 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:00:58,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-09 03:00:58,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098134407] [2022-02-09 03:00:58,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:00:58,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-09 03:00:58,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:00:58,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-09 03:00:58,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-02-09 03:00:58,961 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) [2022-02-09 03:01:00,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:00,415 INFO L93 Difference]: Finished difference Result 2052 states and 8368 transitions. [2022-02-09 03:01:00,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-09 03:01:00,415 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 [2022-02-09 03:01:00,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:00,420 INFO L225 Difference]: With dead ends: 2052 [2022-02-09 03:01:00,420 INFO L226 Difference]: Without dead ends: 2003 [2022-02-09 03:01:00,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=207, Invalid=1433, Unknown=0, NotChecked=0, Total=1640 [2022-02-09 03:01:00,421 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 394 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:00,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 495 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1601 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-09 03:01:00,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2022-02-09 03:01:00,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1377. [2022-02-09 03:01:00,454 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) [2022-02-09 03:01:00,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1377 states to 1377 states and 5874 transitions. [2022-02-09 03:01:00,460 INFO L78 Accepts]: Start accepts. Automaton has 1377 states and 5874 transitions. Word has length 29 [2022-02-09 03:01:00,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:00,461 INFO L470 AbstractCegarLoop]: Abstraction has 1377 states and 5874 transitions. [2022-02-09 03:01:00,461 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) [2022-02-09 03:01:00,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1377 states and 5874 transitions. [2022-02-09 03:01:00,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:00,464 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:00,464 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] [2022-02-09 03:01:00,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:00,679 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 [2022-02-09 03:01:00,679 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:00,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:00,680 INFO L85 PathProgramCache]: Analyzing trace with hash -703947667, now seen corresponding path program 5 times [2022-02-09 03:01:00,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:00,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476225804] [2022-02-09 03:01:00,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:00,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:00,805 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:00,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476225804] [2022-02-09 03:01:00,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476225804] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:00,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608357388] [2022-02-09 03:01:00,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:01:00,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:00,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:00,806 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) [2022-02-09 03:01:00,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-09 03:01:00,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-09 03:01:00,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:00,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-09 03:01:00,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:00,962 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 [2022-02-09 03:01:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:01,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:01,259 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:01,259 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 [2022-02-09 03:01:01,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:01:01,269 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 [2022-02-09 03:01:01,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:01,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608357388] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:01,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:01,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 21 [2022-02-09 03:01:01,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803840076] [2022-02-09 03:01:01,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:01,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-09 03:01:01,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:01,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-09 03:01:01,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-02-09 03:01:01,322 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) [2022-02-09 03:01:02,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:02,279 INFO L93 Difference]: Finished difference Result 2556 states and 10250 transitions. [2022-02-09 03:01:02,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-09 03:01:02,279 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 [2022-02-09 03:01:02,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:02,286 INFO L225 Difference]: With dead ends: 2556 [2022-02-09 03:01:02,286 INFO L226 Difference]: Without dead ends: 2518 [2022-02-09 03:01:02,287 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 [2022-02-09 03:01:02,287 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 538 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:02,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 503 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 03:01:02,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2022-02-09 03:01:02,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 1503. [2022-02-09 03:01:02,324 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) [2022-02-09 03:01:02,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 6456 transitions. [2022-02-09 03:01:02,330 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 6456 transitions. Word has length 29 [2022-02-09 03:01:02,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:02,330 INFO L470 AbstractCegarLoop]: Abstraction has 1503 states and 6456 transitions. [2022-02-09 03:01:02,330 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) [2022-02-09 03:01:02,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 6456 transitions. [2022-02-09 03:01:02,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:02,334 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:02,334 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] [2022-02-09 03:01:02,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-02-09 03:01:02,556 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 [2022-02-09 03:01:02,557 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:02,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:02,557 INFO L85 PathProgramCache]: Analyzing trace with hash 718407159, now seen corresponding path program 6 times [2022-02-09 03:01:02,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:02,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385685243] [2022-02-09 03:01:02,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:02,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:02,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:02,692 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:02,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385685243] [2022-02-09 03:01:02,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385685243] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:02,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067905715] [2022-02-09 03:01:02,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:01:02,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:02,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:02,693 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) [2022-02-09 03:01:02,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-09 03:01:02,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-09 03:01:02,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:02,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-09 03:01:02,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:02,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:02,875 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 [2022-02-09 03:01:03,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:03,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:03,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067905715] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:03,328 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:03,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 18 [2022-02-09 03:01:03,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629837204] [2022-02-09 03:01:03,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:03,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-09 03:01:03,332 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:03,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-09 03:01:03,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-02-09 03:01:03,333 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) [2022-02-09 03:01:03,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:03,782 INFO L93 Difference]: Finished difference Result 1897 states and 7821 transitions. [2022-02-09 03:01:03,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-09 03:01:03,782 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 [2022-02-09 03:01:03,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:03,787 INFO L225 Difference]: With dead ends: 1897 [2022-02-09 03:01:03,788 INFO L226 Difference]: Without dead ends: 1884 [2022-02-09 03:01:03,788 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 [2022-02-09 03:01:03,789 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:03,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 285 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:01:03,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2022-02-09 03:01:03,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1503. [2022-02-09 03:01:03,828 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) [2022-02-09 03:01:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 6453 transitions. [2022-02-09 03:01:03,850 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 6453 transitions. Word has length 29 [2022-02-09 03:01:03,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:03,850 INFO L470 AbstractCegarLoop]: Abstraction has 1503 states and 6453 transitions. [2022-02-09 03:01:03,850 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) [2022-02-09 03:01:03,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 6453 transitions. [2022-02-09 03:01:03,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:03,854 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:03,854 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] [2022-02-09 03:01:03,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:04,075 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 [2022-02-09 03:01:04,075 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:04,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:04,076 INFO L85 PathProgramCache]: Analyzing trace with hash 273305139, now seen corresponding path program 7 times [2022-02-09 03:01:04,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:04,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797017743] [2022-02-09 03:01:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:04,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:04,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:04,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:04,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797017743] [2022-02-09 03:01:04,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797017743] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:04,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077824032] [2022-02-09 03:01:04,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:01:04,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:04,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:04,218 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) [2022-02-09 03:01:04,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-09 03:01:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:04,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:04,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:04,393 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 [2022-02-09 03:01:04,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:04,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:04,697 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:04,697 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 [2022-02-09 03:01:04,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:01:04,709 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 [2022-02-09 03:01:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:04,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077824032] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:04,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:04,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-02-09 03:01:04,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235362108] [2022-02-09 03:01:04,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:04,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:01:04,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:04,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:01:04,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:01:04,774 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) [2022-02-09 03:01:05,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:05,774 INFO L93 Difference]: Finished difference Result 2408 states and 9776 transitions. [2022-02-09 03:01:05,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-09 03:01:05,774 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 [2022-02-09 03:01:05,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:05,780 INFO L225 Difference]: With dead ends: 2408 [2022-02-09 03:01:05,780 INFO L226 Difference]: Without dead ends: 2362 [2022-02-09 03:01:05,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-02-09 03:01:05,781 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 475 mSDsluCounter, 1127 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:05,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 442 Invalid, 1525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-09 03:01:05,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2022-02-09 03:01:05,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 1463. [2022-02-09 03:01:05,824 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) [2022-02-09 03:01:05,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 6275 transitions. [2022-02-09 03:01:05,830 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 6275 transitions. Word has length 29 [2022-02-09 03:01:05,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:05,830 INFO L470 AbstractCegarLoop]: Abstraction has 1463 states and 6275 transitions. [2022-02-09 03:01:05,830 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) [2022-02-09 03:01:05,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 6275 transitions. [2022-02-09 03:01:05,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:05,834 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:05,834 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] [2022-02-09 03:01:05,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:06,047 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 [2022-02-09 03:01:06,047 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:06,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:06,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1839456173, now seen corresponding path program 8 times [2022-02-09 03:01:06,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:06,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300975697] [2022-02-09 03:01:06,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:06,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:06,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:06,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300975697] [2022-02-09 03:01:06,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300975697] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:06,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450564483] [2022-02-09 03:01:06,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:01:06,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:06,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:06,292 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) [2022-02-09 03:01:06,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-09 03:01:06,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:01:06,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:06,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:06,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:06,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:06,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-02-09 03:01:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:06,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:06,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450564483] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:06,921 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:06,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-09 03:01:06,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823730769] [2022-02-09 03:01:06,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:06,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:01:06,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:06,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:01:06,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:01:06,922 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) [2022-02-09 03:01:07,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:07,471 INFO L93 Difference]: Finished difference Result 1689 states and 7120 transitions. [2022-02-09 03:01:07,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-09 03:01:07,471 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 [2022-02-09 03:01:07,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:07,477 INFO L225 Difference]: With dead ends: 1689 [2022-02-09 03:01:07,477 INFO L226 Difference]: Without dead ends: 1670 [2022-02-09 03:01:07,477 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 [2022-02-09 03:01:07,477 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:07,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 387 Invalid, 1336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:01:07,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2022-02-09 03:01:07,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1472. [2022-02-09 03:01:07,506 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) [2022-02-09 03:01:07,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 6299 transitions. [2022-02-09 03:01:07,511 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 6299 transitions. Word has length 29 [2022-02-09 03:01:07,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:07,511 INFO L470 AbstractCegarLoop]: Abstraction has 1472 states and 6299 transitions. [2022-02-09 03:01:07,511 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) [2022-02-09 03:01:07,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 6299 transitions. [2022-02-09 03:01:07,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:07,515 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:07,515 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] [2022-02-09 03:01:07,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-02-09 03:01:07,722 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 [2022-02-09 03:01:07,723 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:07,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:07,723 INFO L85 PathProgramCache]: Analyzing trace with hash -329809185, now seen corresponding path program 9 times [2022-02-09 03:01:07,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:07,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146110122] [2022-02-09 03:01:07,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:07,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:07,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:07,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146110122] [2022-02-09 03:01:07,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146110122] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:07,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602593346] [2022-02-09 03:01:07,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:01:07,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:07,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:07,812 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) [2022-02-09 03:01:07,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-09 03:01:07,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-09 03:01:07,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:07,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-09 03:01:07,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:07,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:07,912 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 [2022-02-09 03:01:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:08,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:08,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602593346] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:08,120 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:08,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-02-09 03:01:08,120 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121510469] [2022-02-09 03:01:08,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:08,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-09 03:01:08,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:08,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-09 03:01:08,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-02-09 03:01:08,122 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) [2022-02-09 03:01:08,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:08,525 INFO L93 Difference]: Finished difference Result 2079 states and 8528 transitions. [2022-02-09 03:01:08,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-09 03:01:08,534 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 [2022-02-09 03:01:08,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:08,540 INFO L225 Difference]: With dead ends: 2079 [2022-02-09 03:01:08,541 INFO L226 Difference]: Without dead ends: 2060 [2022-02-09 03:01:08,541 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 [2022-02-09 03:01:08,542 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:08,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 268 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 03:01:08,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2022-02-09 03:01:08,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1500. [2022-02-09 03:01:08,575 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) [2022-02-09 03:01:08,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 6416 transitions. [2022-02-09 03:01:08,580 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 6416 transitions. Word has length 29 [2022-02-09 03:01:08,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:08,580 INFO L470 AbstractCegarLoop]: Abstraction has 1500 states and 6416 transitions. [2022-02-09 03:01:08,580 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) [2022-02-09 03:01:08,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 6416 transitions. [2022-02-09 03:01:08,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:08,584 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:08,584 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] [2022-02-09 03:01:08,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-02-09 03:01:08,808 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 [2022-02-09 03:01:08,808 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:08,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:08,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1092545641, now seen corresponding path program 10 times [2022-02-09 03:01:08,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:08,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383169751] [2022-02-09 03:01:08,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:08,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:08,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:08,918 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:08,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383169751] [2022-02-09 03:01:08,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383169751] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:08,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324356525] [2022-02-09 03:01:08,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:01:08,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:08,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:08,919 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) [2022-02-09 03:01:08,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-09 03:01:08,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:01:08,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:08,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:08,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:09,082 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 19 treesize of output 11 [2022-02-09 03:01:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:09,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:09,334 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:09,334 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 [2022-02-09 03:01:09,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:01:09,345 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 [2022-02-09 03:01:09,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:09,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324356525] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:09,409 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:09,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:01:09,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140079049] [2022-02-09 03:01:09,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:09,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:01:09,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:09,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:01:09,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:01:09,410 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) [2022-02-09 03:01:10,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:10,217 INFO L93 Difference]: Finished difference Result 2826 states and 11385 transitions. [2022-02-09 03:01:10,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-09 03:01:10,217 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 [2022-02-09 03:01:10,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:10,224 INFO L225 Difference]: With dead ends: 2826 [2022-02-09 03:01:10,224 INFO L226 Difference]: Without dead ends: 2798 [2022-02-09 03:01:10,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:01:10,225 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 511 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:10,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 403 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1310 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-09 03:01:10,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2022-02-09 03:01:10,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 1634. [2022-02-09 03:01:10,262 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) [2022-02-09 03:01:10,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 7047 transitions. [2022-02-09 03:01:10,267 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 7047 transitions. Word has length 29 [2022-02-09 03:01:10,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:10,267 INFO L470 AbstractCegarLoop]: Abstraction has 1634 states and 7047 transitions. [2022-02-09 03:01:10,267 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) [2022-02-09 03:01:10,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 7047 transitions. [2022-02-09 03:01:10,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:10,271 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:10,271 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] [2022-02-09 03:01:10,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:10,485 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 [2022-02-09 03:01:10,485 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:10,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:10,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1493419173, now seen corresponding path program 11 times [2022-02-09 03:01:10,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:10,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388661593] [2022-02-09 03:01:10,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:10,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:10,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:10,585 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:10,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388661593] [2022-02-09 03:01:10,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388661593] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:10,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184977194] [2022-02-09 03:01:10,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:01:10,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:10,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:10,587 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) [2022-02-09 03:01:10,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-09 03:01:10,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-09 03:01:10,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:10,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:10,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:10,800 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 [2022-02-09 03:01:10,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:10,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:11,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:11,048 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 [2022-02-09 03:01:11,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:01:11,058 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 [2022-02-09 03:01:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:11,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184977194] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:11,109 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:11,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:01:11,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563032325] [2022-02-09 03:01:11,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:11,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:01:11,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:11,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:01:11,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:01:11,110 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) [2022-02-09 03:01:12,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:12,085 INFO L93 Difference]: Finished difference Result 2812 states and 11355 transitions. [2022-02-09 03:01:12,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-09 03:01:12,085 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 [2022-02-09 03:01:12,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:12,093 INFO L225 Difference]: With dead ends: 2812 [2022-02-09 03:01:12,093 INFO L226 Difference]: Without dead ends: 2767 [2022-02-09 03:01:12,093 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 [2022-02-09 03:01:12,093 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 344 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:12,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 562 Invalid, 1792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1765 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-09 03:01:12,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2767 states. [2022-02-09 03:01:12,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2767 to 1629. [2022-02-09 03:01:12,128 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) [2022-02-09 03:01:12,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 7045 transitions. [2022-02-09 03:01:12,133 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 7045 transitions. Word has length 29 [2022-02-09 03:01:12,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:12,133 INFO L470 AbstractCegarLoop]: Abstraction has 1629 states and 7045 transitions. [2022-02-09 03:01:12,134 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) [2022-02-09 03:01:12,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 7045 transitions. [2022-02-09 03:01:12,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:12,137 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:12,137 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] [2022-02-09 03:01:12,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:12,354 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 [2022-02-09 03:01:12,354 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:12,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:12,355 INFO L85 PathProgramCache]: Analyzing trace with hash -2081372641, now seen corresponding path program 12 times [2022-02-09 03:01:12,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:12,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599145002] [2022-02-09 03:01:12,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:12,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:12,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:12,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:12,472 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:12,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599145002] [2022-02-09 03:01:12,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599145002] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:12,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583249773] [2022-02-09 03:01:12,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:01:12,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:12,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:12,474 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) [2022-02-09 03:01:12,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-09 03:01:12,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-09 03:01:12,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:12,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:12,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:12,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:12,673 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 [2022-02-09 03:01:12,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:12,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:13,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:13,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583249773] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:13,050 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:13,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-09 03:01:13,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870858179] [2022-02-09 03:01:13,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:13,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:01:13,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:13,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:01:13,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:01:13,051 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) [2022-02-09 03:01:13,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:13,637 INFO L93 Difference]: Finished difference Result 1983 states and 8362 transitions. [2022-02-09 03:01:13,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-09 03:01:13,637 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 [2022-02-09 03:01:13,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:13,642 INFO L225 Difference]: With dead ends: 1983 [2022-02-09 03:01:13,642 INFO L226 Difference]: Without dead ends: 1964 [2022-02-09 03:01:13,643 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 [2022-02-09 03:01:13,643 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 130 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:13,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 332 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:01:13,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2022-02-09 03:01:13,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1617. [2022-02-09 03:01:13,669 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) [2022-02-09 03:01:13,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 7000 transitions. [2022-02-09 03:01:13,674 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 7000 transitions. Word has length 29 [2022-02-09 03:01:13,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:13,674 INFO L470 AbstractCegarLoop]: Abstraction has 1617 states and 7000 transitions. [2022-02-09 03:01:13,674 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) [2022-02-09 03:01:13,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 7000 transitions. [2022-02-09 03:01:13,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:13,678 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:13,678 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] [2022-02-09 03:01:13,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:13,894 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 [2022-02-09 03:01:13,894 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:13,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:13,895 INFO L85 PathProgramCache]: Analyzing trace with hash 74229341, now seen corresponding path program 13 times [2022-02-09 03:01:13,895 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:13,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563362009] [2022-02-09 03:01:13,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:13,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:13,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:13,995 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:13,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563362009] [2022-02-09 03:01:13,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563362009] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:13,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369488723] [2022-02-09 03:01:13,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:01:13,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:13,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:13,997 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) [2022-02-09 03:01:14,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-09 03:01:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:14,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:14,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:14,276 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 [2022-02-09 03:01:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:14,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:14,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:14,508 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 [2022-02-09 03:01:14,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:01:14,518 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 [2022-02-09 03:01:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:14,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369488723] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:14,571 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:14,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-09 03:01:14,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631547367] [2022-02-09 03:01:14,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:14,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-09 03:01:14,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:14,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-09 03:01:14,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-02-09 03:01:14,572 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) [2022-02-09 03:01:15,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:15,578 INFO L93 Difference]: Finished difference Result 2035 states and 8556 transitions. [2022-02-09 03:01:15,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-09 03:01:15,578 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 [2022-02-09 03:01:15,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:15,583 INFO L225 Difference]: With dead ends: 2035 [2022-02-09 03:01:15,584 INFO L226 Difference]: Without dead ends: 2016 [2022-02-09 03:01:15,584 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 [2022-02-09 03:01:15,584 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 [2022-02-09 03:01:15,585 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] [2022-02-09 03:01:15,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2022-02-09 03:01:15,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1620. [2022-02-09 03:01:15,609 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) [2022-02-09 03:01:15,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 7005 transitions. [2022-02-09 03:01:15,614 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 7005 transitions. Word has length 29 [2022-02-09 03:01:15,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:15,614 INFO L470 AbstractCegarLoop]: Abstraction has 1620 states and 7005 transitions. [2022-02-09 03:01:15,614 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) [2022-02-09 03:01:15,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 7005 transitions. [2022-02-09 03:01:15,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:15,617 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:15,617 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] [2022-02-09 03:01:15,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:15,833 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 [2022-02-09 03:01:15,834 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:15,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:15,834 INFO L85 PathProgramCache]: Analyzing trace with hash 2144591933, now seen corresponding path program 14 times [2022-02-09 03:01:15,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:15,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315165150] [2022-02-09 03:01:15,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:15,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:15,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:15,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315165150] [2022-02-09 03:01:15,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315165150] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:15,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524195578] [2022-02-09 03:01:15,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:01:15,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:15,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:15,940 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) [2022-02-09 03:01:15,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-09 03:01:15,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:01:15,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:15,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:15,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:16,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:16,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-02-09 03:01:16,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:16,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:16,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524195578] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:16,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:16,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-09 03:01:16,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236175650] [2022-02-09 03:01:16,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:16,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:01:16,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:16,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:01:16,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:01:16,520 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) [2022-02-09 03:01:17,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:17,033 INFO L93 Difference]: Finished difference Result 1952 states and 8242 transitions. [2022-02-09 03:01:17,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-09 03:01:17,033 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 [2022-02-09 03:01:17,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:17,038 INFO L225 Difference]: With dead ends: 1952 [2022-02-09 03:01:17,038 INFO L226 Difference]: Without dead ends: 1933 [2022-02-09 03:01:17,039 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 [2022-02-09 03:01:17,039 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 148 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:17,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 272 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:01:17,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2022-02-09 03:01:17,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1617. [2022-02-09 03:01:17,063 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) [2022-02-09 03:01:17,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 6996 transitions. [2022-02-09 03:01:17,068 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 6996 transitions. Word has length 29 [2022-02-09 03:01:17,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:17,068 INFO L470 AbstractCegarLoop]: Abstraction has 1617 states and 6996 transitions. [2022-02-09 03:01:17,068 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) [2022-02-09 03:01:17,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 6996 transitions. [2022-02-09 03:01:17,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:17,072 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:17,072 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] [2022-02-09 03:01:17,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:17,288 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 [2022-02-09 03:01:17,288 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:17,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:17,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1194824863, now seen corresponding path program 15 times [2022-02-09 03:01:17,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:17,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237001224] [2022-02-09 03:01:17,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:17,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:17,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:17,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237001224] [2022-02-09 03:01:17,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237001224] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:17,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763649006] [2022-02-09 03:01:17,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:01:17,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:17,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:17,393 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) [2022-02-09 03:01:17,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-09 03:01:17,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-09 03:01:17,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:17,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:17,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:17,614 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:17,614 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 [2022-02-09 03:01:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:17,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:17,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763649006] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:17,946 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:17,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-09 03:01:17,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272232428] [2022-02-09 03:01:17,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:17,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:01:17,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:17,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:01:17,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:01:17,947 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) [2022-02-09 03:01:18,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:18,611 INFO L93 Difference]: Finished difference Result 2176 states and 9141 transitions. [2022-02-09 03:01:18,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-09 03:01:18,611 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 [2022-02-09 03:01:18,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:18,616 INFO L225 Difference]: With dead ends: 2176 [2022-02-09 03:01:18,617 INFO L226 Difference]: Without dead ends: 2157 [2022-02-09 03:01:18,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2022-02-09 03:01:18,627 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 329 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:18,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 333 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 03:01:18,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2022-02-09 03:01:18,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1698. [2022-02-09 03:01:18,684 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) [2022-02-09 03:01:18,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 7370 transitions. [2022-02-09 03:01:18,689 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 7370 transitions. Word has length 29 [2022-02-09 03:01:18,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:18,689 INFO L470 AbstractCegarLoop]: Abstraction has 1698 states and 7370 transitions. [2022-02-09 03:01:18,689 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) [2022-02-09 03:01:18,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 7370 transitions. [2022-02-09 03:01:18,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:18,696 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:18,696 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] [2022-02-09 03:01:18,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:18,914 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 [2022-02-09 03:01:18,914 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:18,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:18,915 INFO L85 PathProgramCache]: Analyzing trace with hash 108447743, now seen corresponding path program 16 times [2022-02-09 03:01:18,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:18,915 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885337692] [2022-02-09 03:01:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:18,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:19,061 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:19,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885337692] [2022-02-09 03:01:19,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885337692] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:19,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270437536] [2022-02-09 03:01:19,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:01:19,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:19,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:19,062 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) [2022-02-09 03:01:19,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-09 03:01:19,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:01:19,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:19,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:19,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:19,299 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 [2022-02-09 03:01:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:19,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:19,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:19,519 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 [2022-02-09 03:01:19,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:01:19,535 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 [2022-02-09 03:01:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:19,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270437536] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:19,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:19,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:01:19,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200242132] [2022-02-09 03:01:19,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:19,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:01:19,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:19,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:01:19,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:01:19,604 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) [2022-02-09 03:01:20,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:20,470 INFO L93 Difference]: Finished difference Result 2754 states and 11325 transitions. [2022-02-09 03:01:20,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-09 03:01:20,471 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 [2022-02-09 03:01:20,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:20,478 INFO L225 Difference]: With dead ends: 2754 [2022-02-09 03:01:20,478 INFO L226 Difference]: Without dead ends: 2726 [2022-02-09 03:01:20,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:01:20,479 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 381 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:20,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 472 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1548 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-09 03:01:20,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2022-02-09 03:01:20,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 1807. [2022-02-09 03:01:20,517 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) [2022-02-09 03:01:20,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 7906 transitions. [2022-02-09 03:01:20,523 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 7906 transitions. Word has length 29 [2022-02-09 03:01:20,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:20,523 INFO L470 AbstractCegarLoop]: Abstraction has 1807 states and 7906 transitions. [2022-02-09 03:01:20,524 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) [2022-02-09 03:01:20,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 7906 transitions. [2022-02-09 03:01:20,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:20,528 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:20,528 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] [2022-02-09 03:01:20,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:20,744 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 [2022-02-09 03:01:20,744 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:20,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:20,744 INFO L85 PathProgramCache]: Analyzing trace with hash 55061223, now seen corresponding path program 17 times [2022-02-09 03:01:20,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:20,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597112601] [2022-02-09 03:01:20,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:20,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:20,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:20,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597112601] [2022-02-09 03:01:20,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597112601] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:20,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158306569] [2022-02-09 03:01:20,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:01:20,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:20,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:20,841 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) [2022-02-09 03:01:20,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-09 03:01:20,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:01:20,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:20,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:20,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:21,091 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 [2022-02-09 03:01:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:21,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:21,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:21,318 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 [2022-02-09 03:01:21,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:01:21,330 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 [2022-02-09 03:01:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:21,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158306569] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:21,418 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:21,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:01:21,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264625613] [2022-02-09 03:01:21,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:21,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:01:21,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:21,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:01:21,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:01:21,420 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) [2022-02-09 03:01:22,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:22,089 INFO L93 Difference]: Finished difference Result 2761 states and 11342 transitions. [2022-02-09 03:01:22,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-09 03:01:22,090 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 [2022-02-09 03:01:22,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:22,097 INFO L225 Difference]: With dead ends: 2761 [2022-02-09 03:01:22,097 INFO L226 Difference]: Without dead ends: 2728 [2022-02-09 03:01:22,097 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 [2022-02-09 03:01:22,098 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 383 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:22,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 455 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1502 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 03:01:22,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2022-02-09 03:01:22,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 1767. [2022-02-09 03:01:22,133 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) [2022-02-09 03:01:22,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 7731 transitions. [2022-02-09 03:01:22,138 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 7731 transitions. Word has length 29 [2022-02-09 03:01:22,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:22,138 INFO L470 AbstractCegarLoop]: Abstraction has 1767 states and 7731 transitions. [2022-02-09 03:01:22,138 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) [2022-02-09 03:01:22,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 7731 transitions. [2022-02-09 03:01:22,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:22,142 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:22,142 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] [2022-02-09 03:01:22,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:22,356 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 [2022-02-09 03:01:22,356 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:22,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:22,357 INFO L85 PathProgramCache]: Analyzing trace with hash 2117890319, now seen corresponding path program 18 times [2022-02-09 03:01:22,357 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:22,357 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182305623] [2022-02-09 03:01:22,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:22,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:22,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:22,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182305623] [2022-02-09 03:01:22,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182305623] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:22,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556491892] [2022-02-09 03:01:22,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:01:22,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:22,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:22,466 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) [2022-02-09 03:01:22,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-09 03:01:22,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-09 03:01:22,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:22,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:22,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:22,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:22,697 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 [2022-02-09 03:01:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:22,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:23,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:23,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556491892] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:23,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:23,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-09 03:01:23,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799255663] [2022-02-09 03:01:23,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:23,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:01:23,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:23,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:01:23,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:01:23,037 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) [2022-02-09 03:01:23,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:23,472 INFO L93 Difference]: Finished difference Result 2094 states and 8952 transitions. [2022-02-09 03:01:23,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-09 03:01:23,472 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 [2022-02-09 03:01:23,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:23,493 INFO L225 Difference]: With dead ends: 2094 [2022-02-09 03:01:23,493 INFO L226 Difference]: Without dead ends: 2079 [2022-02-09 03:01:23,493 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 [2022-02-09 03:01:23,493 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:23,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 319 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 03:01:23,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2022-02-09 03:01:23,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 1755. [2022-02-09 03:01:23,517 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) [2022-02-09 03:01:23,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 7682 transitions. [2022-02-09 03:01:23,522 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 7682 transitions. Word has length 29 [2022-02-09 03:01:23,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:23,522 INFO L470 AbstractCegarLoop]: Abstraction has 1755 states and 7682 transitions. [2022-02-09 03:01:23,522 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) [2022-02-09 03:01:23,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 7682 transitions. [2022-02-09 03:01:23,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:23,526 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:23,527 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] [2022-02-09 03:01:23,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:23,730 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 [2022-02-09 03:01:23,730 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:23,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:23,731 INFO L85 PathProgramCache]: Analyzing trace with hash -101621211, now seen corresponding path program 19 times [2022-02-09 03:01:23,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:23,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52583075] [2022-02-09 03:01:23,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:23,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:23,853 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:23,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52583075] [2022-02-09 03:01:23,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52583075] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:23,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115236229] [2022-02-09 03:01:23,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:01:23,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:23,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:23,854 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) [2022-02-09 03:01:23,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-09 03:01:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:23,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:23,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:24,095 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 [2022-02-09 03:01:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:24,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:24,257 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:24,258 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 [2022-02-09 03:01:24,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:01:24,266 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 [2022-02-09 03:01:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:24,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115236229] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:24,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:24,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-09 03:01:24,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398578670] [2022-02-09 03:01:24,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:24,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-09 03:01:24,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:24,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-09 03:01:24,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-02-09 03:01:24,318 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) [2022-02-09 03:01:25,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:25,215 INFO L93 Difference]: Finished difference Result 2126 states and 9072 transitions. [2022-02-09 03:01:25,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-09 03:01:25,215 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 [2022-02-09 03:01:25,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:25,220 INFO L225 Difference]: With dead ends: 2126 [2022-02-09 03:01:25,222 INFO L226 Difference]: Without dead ends: 2111 [2022-02-09 03:01:25,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-02-09 03:01:25,243 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 252 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 1718 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 [2022-02-09 03:01:25,243 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] [2022-02-09 03:01:25,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2022-02-09 03:01:25,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1767. [2022-02-09 03:01:25,284 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) [2022-02-09 03:01:25,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 7714 transitions. [2022-02-09 03:01:25,289 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 7714 transitions. Word has length 29 [2022-02-09 03:01:25,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:25,289 INFO L470 AbstractCegarLoop]: Abstraction has 1767 states and 7714 transitions. [2022-02-09 03:01:25,290 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) [2022-02-09 03:01:25,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 7714 transitions. [2022-02-09 03:01:25,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:25,293 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:25,293 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] [2022-02-09 03:01:25,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:25,507 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 [2022-02-09 03:01:25,508 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:25,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:25,508 INFO L85 PathProgramCache]: Analyzing trace with hash 332408135, now seen corresponding path program 20 times [2022-02-09 03:01:25,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:25,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466482257] [2022-02-09 03:01:25,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:25,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:25,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:25,591 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:25,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466482257] [2022-02-09 03:01:25,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466482257] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:25,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700684478] [2022-02-09 03:01:25,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:01:25,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:25,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:25,592 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) [2022-02-09 03:01:25,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-09 03:01:25,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:01:25,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:25,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:25,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:25,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:25,789 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 15 treesize of output 19 [2022-02-09 03:01:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:25,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:26,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700684478] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:26,008 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:26,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-09 03:01:26,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063001127] [2022-02-09 03:01:26,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:26,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-09 03:01:26,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:26,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-09 03:01:26,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-02-09 03:01:26,009 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) [2022-02-09 03:01:26,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:26,526 INFO L93 Difference]: Finished difference Result 2191 states and 9154 transitions. [2022-02-09 03:01:26,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-09 03:01:26,527 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 [2022-02-09 03:01:26,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:26,532 INFO L225 Difference]: With dead ends: 2191 [2022-02-09 03:01:26,532 INFO L226 Difference]: Without dead ends: 2176 [2022-02-09 03:01:26,533 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 [2022-02-09 03:01:26,533 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 [2022-02-09 03:01:26,533 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] [2022-02-09 03:01:26,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2022-02-09 03:01:26,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1764. [2022-02-09 03:01:26,576 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) [2022-02-09 03:01:26,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 7704 transitions. [2022-02-09 03:01:26,581 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 7704 transitions. Word has length 29 [2022-02-09 03:01:26,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:26,581 INFO L470 AbstractCegarLoop]: Abstraction has 1764 states and 7704 transitions. [2022-02-09 03:01:26,581 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) [2022-02-09 03:01:26,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 7704 transitions. [2022-02-09 03:01:26,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:26,596 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:26,596 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] [2022-02-09 03:01:26,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-02-09 03:01:26,813 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 [2022-02-09 03:01:26,816 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:26,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:26,817 INFO L85 PathProgramCache]: Analyzing trace with hash 754462757, now seen corresponding path program 21 times [2022-02-09 03:01:26,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:26,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72704160] [2022-02-09 03:01:26,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:26,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:26,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:26,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:26,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:26,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72704160] [2022-02-09 03:01:26,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72704160] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:26,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833419051] [2022-02-09 03:01:26,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:01:26,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:26,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:26,938 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) [2022-02-09 03:01:26,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-09 03:01:27,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-09 03:01:27,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:27,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:27,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:27,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:27,138 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 [2022-02-09 03:01:27,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:27,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:27,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833419051] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:27,576 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:27,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-09 03:01:27,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514004066] [2022-02-09 03:01:27,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:27,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:01:27,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:27,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:01:27,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:01:27,577 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) [2022-02-09 03:01:28,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:28,205 INFO L93 Difference]: Finished difference Result 2126 states and 9065 transitions. [2022-02-09 03:01:28,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-09 03:01:28,205 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 [2022-02-09 03:01:28,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:28,212 INFO L225 Difference]: With dead ends: 2126 [2022-02-09 03:01:28,212 INFO L226 Difference]: Without dead ends: 2107 [2022-02-09 03:01:28,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-02-09 03:01:28,213 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 [2022-02-09 03:01:28,213 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] [2022-02-09 03:01:28,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2022-02-09 03:01:28,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 1794. [2022-02-09 03:01:28,248 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) [2022-02-09 03:01:28,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 7846 transitions. [2022-02-09 03:01:28,255 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 7846 transitions. Word has length 29 [2022-02-09 03:01:28,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:28,255 INFO L470 AbstractCegarLoop]: Abstraction has 1794 states and 7846 transitions. [2022-02-09 03:01:28,255 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) [2022-02-09 03:01:28,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 7846 transitions. [2022-02-09 03:01:28,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:28,261 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:28,261 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] [2022-02-09 03:01:28,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-02-09 03:01:28,484 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 [2022-02-09 03:01:28,484 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:28,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:28,484 INFO L85 PathProgramCache]: Analyzing trace with hash 2057735363, now seen corresponding path program 22 times [2022-02-09 03:01:28,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:28,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634846955] [2022-02-09 03:01:28,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:28,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:28,601 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:28,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634846955] [2022-02-09 03:01:28,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634846955] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:28,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347511559] [2022-02-09 03:01:28,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:01:28,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:28,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:28,603 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) [2022-02-09 03:01:28,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-09 03:01:28,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:01:28,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:28,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:28,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:28,786 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 [2022-02-09 03:01:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:28,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:29,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:29,028 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 [2022-02-09 03:01:29,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:01:29,037 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 [2022-02-09 03:01:29,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:29,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347511559] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:29,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:29,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:01:29,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119516314] [2022-02-09 03:01:29,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:29,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:01:29,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:29,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:01:29,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:01:29,099 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) [2022-02-09 03:01:29,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:29,779 INFO L93 Difference]: Finished difference Result 2562 states and 10721 transitions. [2022-02-09 03:01:29,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-09 03:01:29,779 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 [2022-02-09 03:01:29,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:29,787 INFO L225 Difference]: With dead ends: 2562 [2022-02-09 03:01:29,787 INFO L226 Difference]: Without dead ends: 2534 [2022-02-09 03:01:29,787 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 [2022-02-09 03:01:29,788 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:29,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 415 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1434 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:01:29,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2022-02-09 03:01:29,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 1885. [2022-02-09 03:01:29,839 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) [2022-02-09 03:01:29,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 8284 transitions. [2022-02-09 03:01:29,844 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 8284 transitions. Word has length 29 [2022-02-09 03:01:29,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:29,845 INFO L470 AbstractCegarLoop]: Abstraction has 1885 states and 8284 transitions. [2022-02-09 03:01:29,845 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) [2022-02-09 03:01:29,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 8284 transitions. [2022-02-09 03:01:29,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:29,849 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:29,849 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] [2022-02-09 03:01:29,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:30,074 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 [2022-02-09 03:01:30,075 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:30,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:30,075 INFO L85 PathProgramCache]: Analyzing trace with hash 2004348843, now seen corresponding path program 23 times [2022-02-09 03:01:30,075 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:30,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021599476] [2022-02-09 03:01:30,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:30,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:30,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:30,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021599476] [2022-02-09 03:01:30,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021599476] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:30,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96545534] [2022-02-09 03:01:30,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:01:30,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:30,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:30,215 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) [2022-02-09 03:01:30,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-09 03:01:30,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:01:30,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:30,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:30,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:30,397 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 [2022-02-09 03:01:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:30,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:30,577 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:30,577 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-02-09 03:01:30,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:01:30,584 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 [2022-02-09 03:01:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:30,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96545534] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:30,625 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:30,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:01:30,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985473158] [2022-02-09 03:01:30,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:30,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:01:30,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:30,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:01:30,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:01:30,626 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) [2022-02-09 03:01:31,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:31,172 INFO L93 Difference]: Finished difference Result 2569 states and 10738 transitions. [2022-02-09 03:01:31,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-09 03:01:31,172 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 [2022-02-09 03:01:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:31,178 INFO L225 Difference]: With dead ends: 2569 [2022-02-09 03:01:31,179 INFO L226 Difference]: Without dead ends: 2536 [2022-02-09 03:01:31,179 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 [2022-02-09 03:01:31,179 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 400 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:31,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 355 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 03:01:31,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2536 states. [2022-02-09 03:01:31,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2536 to 1824. [2022-02-09 03:01:31,214 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) [2022-02-09 03:01:31,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 8009 transitions. [2022-02-09 03:01:31,222 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 8009 transitions. Word has length 29 [2022-02-09 03:01:31,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:31,222 INFO L470 AbstractCegarLoop]: Abstraction has 1824 states and 8009 transitions. [2022-02-09 03:01:31,222 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) [2022-02-09 03:01:31,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 8009 transitions. [2022-02-09 03:01:31,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:31,227 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:31,227 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] [2022-02-09 03:01:31,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:31,451 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 [2022-02-09 03:01:31,451 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:31,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:31,451 INFO L85 PathProgramCache]: Analyzing trace with hash -227789357, now seen corresponding path program 24 times [2022-02-09 03:01:31,451 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:31,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488874225] [2022-02-09 03:01:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:31,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:31,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:31,548 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:31,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488874225] [2022-02-09 03:01:31,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488874225] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:31,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654361742] [2022-02-09 03:01:31,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:01:31,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:31,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:31,549 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) [2022-02-09 03:01:31,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-09 03:01:31,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-09 03:01:31,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:31,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:31,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:31,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:31,702 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 [2022-02-09 03:01:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:31,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:31,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654361742] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:31,973 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:31,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-09 03:01:31,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544384179] [2022-02-09 03:01:31,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:31,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:01:31,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:31,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:01:31,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:01:31,974 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) [2022-02-09 03:01:32,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:32,392 INFO L93 Difference]: Finished difference Result 1999 states and 8662 transitions. [2022-02-09 03:01:32,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-09 03:01:32,392 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 [2022-02-09 03:01:32,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:32,399 INFO L225 Difference]: With dead ends: 1999 [2022-02-09 03:01:32,399 INFO L226 Difference]: Without dead ends: 1984 [2022-02-09 03:01:32,400 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 [2022-02-09 03:01:32,400 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 125 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:32,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 343 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 03:01:32,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2022-02-09 03:01:32,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1809. [2022-02-09 03:01:32,430 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) [2022-02-09 03:01:32,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 7950 transitions. [2022-02-09 03:01:32,435 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 7950 transitions. Word has length 29 [2022-02-09 03:01:32,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:32,435 INFO L470 AbstractCegarLoop]: Abstraction has 1809 states and 7950 transitions. [2022-02-09 03:01:32,436 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) [2022-02-09 03:01:32,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 7950 transitions. [2022-02-09 03:01:32,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:32,439 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:32,439 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] [2022-02-09 03:01:32,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:32,652 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 [2022-02-09 03:01:32,652 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:32,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:32,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1276561759, now seen corresponding path program 25 times [2022-02-09 03:01:32,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:32,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894408377] [2022-02-09 03:01:32,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:32,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:32,764 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:32,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894408377] [2022-02-09 03:01:32,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894408377] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:32,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901883697] [2022-02-09 03:01:32,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:01:32,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:32,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:32,766 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) [2022-02-09 03:01:32,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-09 03:01:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:32,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:32,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:32,908 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 [2022-02-09 03:01:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:32,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:33,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:33,074 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-02-09 03:01:33,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:01:33,082 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 [2022-02-09 03:01:33,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:33,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901883697] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:33,124 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:33,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-02-09 03:01:33,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025116445] [2022-02-09 03:01:33,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:33,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:01:33,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:33,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:01:33,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:01:33,125 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) [2022-02-09 03:01:33,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:33,854 INFO L93 Difference]: Finished difference Result 2655 states and 11037 transitions. [2022-02-09 03:01:33,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-09 03:01:33,854 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 [2022-02-09 03:01:33,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:33,864 INFO L225 Difference]: With dead ends: 2655 [2022-02-09 03:01:33,864 INFO L226 Difference]: Without dead ends: 2617 [2022-02-09 03:01:33,864 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 [2022-02-09 03:01:33,865 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 601 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:33,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [601 Valid, 403 Invalid, 1468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1388 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:01:33,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2617 states. [2022-02-09 03:01:33,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2617 to 1921. [2022-02-09 03:01:33,909 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) [2022-02-09 03:01:33,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 8491 transitions. [2022-02-09 03:01:33,915 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 8491 transitions. Word has length 29 [2022-02-09 03:01:33,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:33,915 INFO L470 AbstractCegarLoop]: Abstraction has 1921 states and 8491 transitions. [2022-02-09 03:01:33,915 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) [2022-02-09 03:01:33,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 8491 transitions. [2022-02-09 03:01:33,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:33,923 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:33,923 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] [2022-02-09 03:01:33,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:34,140 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 [2022-02-09 03:01:34,140 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:34,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:34,140 INFO L85 PathProgramCache]: Analyzing trace with hash 26710847, now seen corresponding path program 26 times [2022-02-09 03:01:34,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:34,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996164593] [2022-02-09 03:01:34,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:34,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:34,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:34,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996164593] [2022-02-09 03:01:34,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996164593] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:34,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607326331] [2022-02-09 03:01:34,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:01:34,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:34,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:34,225 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) [2022-02-09 03:01:34,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-09 03:01:34,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:01:34,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:34,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:34,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:34,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:34,385 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 [2022-02-09 03:01:34,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:34,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:34,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607326331] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:34,624 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:34,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-02-09 03:01:34,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445879524] [2022-02-09 03:01:34,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:34,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:01:34,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:34,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:01:34,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:01:34,625 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) [2022-02-09 03:01:35,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:35,025 INFO L93 Difference]: Finished difference Result 2244 states and 9582 transitions. [2022-02-09 03:01:35,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-09 03:01:35,025 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 [2022-02-09 03:01:35,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:35,031 INFO L225 Difference]: With dead ends: 2244 [2022-02-09 03:01:35,031 INFO L226 Difference]: Without dead ends: 2231 [2022-02-09 03:01:35,032 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 [2022-02-09 03:01:35,032 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 274 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:35,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 310 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 03:01:35,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2022-02-09 03:01:35,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 1921. [2022-02-09 03:01:35,062 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) [2022-02-09 03:01:35,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 8488 transitions. [2022-02-09 03:01:35,088 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 8488 transitions. Word has length 29 [2022-02-09 03:01:35,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:35,088 INFO L470 AbstractCegarLoop]: Abstraction has 1921 states and 8488 transitions. [2022-02-09 03:01:35,089 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) [2022-02-09 03:01:35,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 8488 transitions. [2022-02-09 03:01:35,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:35,093 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:35,093 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] [2022-02-09 03:01:35,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:35,307 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 [2022-02-09 03:01:35,308 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:35,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:35,308 INFO L85 PathProgramCache]: Analyzing trace with hash -872651225, now seen corresponding path program 27 times [2022-02-09 03:01:35,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:35,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68516515] [2022-02-09 03:01:35,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:35,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:35,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:35,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:35,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68516515] [2022-02-09 03:01:35,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68516515] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:35,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987416366] [2022-02-09 03:01:35,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:01:35,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:35,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:35,407 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) [2022-02-09 03:01:35,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-09 03:01:35,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-09 03:01:35,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:35,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:35,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:35,574 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:35,574 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 [2022-02-09 03:01:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:35,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:35,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:35,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987416366] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:35,901 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:35,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-09 03:01:35,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112612522] [2022-02-09 03:01:35,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:35,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:01:35,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:35,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:01:35,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:01:35,902 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) [2022-02-09 03:01:36,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:36,427 INFO L93 Difference]: Finished difference Result 2209 states and 9500 transitions. [2022-02-09 03:01:36,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-09 03:01:36,428 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 [2022-02-09 03:01:36,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:36,433 INFO L225 Difference]: With dead ends: 2209 [2022-02-09 03:01:36,433 INFO L226 Difference]: Without dead ends: 2181 [2022-02-09 03:01:36,434 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 [2022-02-09 03:01:36,434 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 303 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-02-09 03:01:36,434 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] [2022-02-09 03:01:36,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2022-02-09 03:01:36,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 1881. [2022-02-09 03:01:36,459 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) [2022-02-09 03:01:36,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 8313 transitions. [2022-02-09 03:01:36,465 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 8313 transitions. Word has length 29 [2022-02-09 03:01:36,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:36,465 INFO L470 AbstractCegarLoop]: Abstraction has 1881 states and 8313 transitions. [2022-02-09 03:01:36,465 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) [2022-02-09 03:01:36,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 8313 transitions. [2022-02-09 03:01:36,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:36,469 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:36,469 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] [2022-02-09 03:01:36,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:36,683 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 [2022-02-09 03:01:36,684 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:36,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:36,684 INFO L85 PathProgramCache]: Analyzing trace with hash -757329439, now seen corresponding path program 28 times [2022-02-09 03:01:36,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:36,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743326619] [2022-02-09 03:01:36,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:36,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:36,804 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:36,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743326619] [2022-02-09 03:01:36,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743326619] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:36,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927755072] [2022-02-09 03:01:36,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:01:36,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:36,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:36,805 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) [2022-02-09 03:01:36,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-09 03:01:36,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:01:36,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:36,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:36,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:36,948 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 [2022-02-09 03:01:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:37,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:37,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:37,131 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 [2022-02-09 03:01:37,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:01:37,148 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 [2022-02-09 03:01:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:37,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927755072] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:37,187 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:37,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-09 03:01:37,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943807220] [2022-02-09 03:01:37,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:37,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-09 03:01:37,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:37,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-09 03:01:37,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-02-09 03:01:37,188 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) [2022-02-09 03:01:38,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:38,041 INFO L93 Difference]: Finished difference Result 2425 states and 10268 transitions. [2022-02-09 03:01:38,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-09 03:01:38,041 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 [2022-02-09 03:01:38,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:38,049 INFO L225 Difference]: With dead ends: 2425 [2022-02-09 03:01:38,049 INFO L226 Difference]: Without dead ends: 2387 [2022-02-09 03:01:38,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2022-02-09 03:01:38,060 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 384 mSDsluCounter, 1335 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:38,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 520 Invalid, 1786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1734 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 03:01:38,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2022-02-09 03:01:38,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 1881. [2022-02-09 03:01:38,107 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) [2022-02-09 03:01:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 8313 transitions. [2022-02-09 03:01:38,113 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 8313 transitions. Word has length 29 [2022-02-09 03:01:38,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:38,113 INFO L470 AbstractCegarLoop]: Abstraction has 1881 states and 8313 transitions. [2022-02-09 03:01:38,114 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) [2022-02-09 03:01:38,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 8313 transitions. [2022-02-09 03:01:38,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:38,118 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:38,118 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] [2022-02-09 03:01:38,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:38,331 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 [2022-02-09 03:01:38,331 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:38,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:38,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1692151869, now seen corresponding path program 29 times [2022-02-09 03:01:38,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:38,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666845501] [2022-02-09 03:01:38,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:38,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:38,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:38,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666845501] [2022-02-09 03:01:38,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666845501] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:38,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012767435] [2022-02-09 03:01:38,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:01:38,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:38,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:38,433 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) [2022-02-09 03:01:38,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-09 03:01:38,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-09 03:01:38,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:38,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-09 03:01:38,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:38,576 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 [2022-02-09 03:01:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:38,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:38,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:38,752 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 [2022-02-09 03:01:38,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:01:38,760 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 [2022-02-09 03:01:38,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:38,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012767435] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:38,808 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:38,808 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2022-02-09 03:01:38,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080412575] [2022-02-09 03:01:38,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:38,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:01:38,809 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:38,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:01:38,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:01:38,809 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) [2022-02-09 03:01:39,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:39,784 INFO L93 Difference]: Finished difference Result 2447 states and 10393 transitions. [2022-02-09 03:01:39,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-09 03:01:39,784 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 [2022-02-09 03:01:39,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:39,792 INFO L225 Difference]: With dead ends: 2447 [2022-02-09 03:01:39,792 INFO L226 Difference]: Without dead ends: 2425 [2022-02-09 03:01:39,794 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 [2022-02-09 03:01:39,795 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 [2022-02-09 03:01:39,795 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] [2022-02-09 03:01:39,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2022-02-09 03:01:39,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1869. [2022-02-09 03:01:39,833 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) [2022-02-09 03:01:39,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 8264 transitions. [2022-02-09 03:01:39,842 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 8264 transitions. Word has length 29 [2022-02-09 03:01:39,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:39,842 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 8264 transitions. [2022-02-09 03:01:39,842 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) [2022-02-09 03:01:39,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 8264 transitions. [2022-02-09 03:01:39,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:39,847 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:39,847 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] [2022-02-09 03:01:39,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:40,064 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 [2022-02-09 03:01:40,066 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:40,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:40,066 INFO L85 PathProgramCache]: Analyzing trace with hash -285338559, now seen corresponding path program 15 times [2022-02-09 03:01:40,067 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:40,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516541760] [2022-02-09 03:01:40,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:40,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:40,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:40,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:40,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516541760] [2022-02-09 03:01:40,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516541760] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:40,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968576089] [2022-02-09 03:01:40,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:01:40,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:40,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:40,250 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) [2022-02-09 03:01:40,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-09 03:01:40,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-09 03:01:40,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:40,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:40,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:40,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:40,481 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 [2022-02-09 03:01:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:40,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:40,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:40,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968576089] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:40,888 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:40,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-09 03:01:40,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947836509] [2022-02-09 03:01:40,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:40,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:01:40,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:40,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:01:40,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:01:40,889 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) [2022-02-09 03:01:41,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:41,626 INFO L93 Difference]: Finished difference Result 2494 states and 10689 transitions. [2022-02-09 03:01:41,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-09 03:01:41,626 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 [2022-02-09 03:01:41,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:41,633 INFO L225 Difference]: With dead ends: 2494 [2022-02-09 03:01:41,633 INFO L226 Difference]: Without dead ends: 2475 [2022-02-09 03:01:41,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2022-02-09 03:01:41,633 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 357 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:41,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 360 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 03:01:41,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2022-02-09 03:01:41,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 1968. [2022-02-09 03:01:41,664 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) [2022-02-09 03:01:41,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 8708 transitions. [2022-02-09 03:01:41,671 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 8708 transitions. Word has length 29 [2022-02-09 03:01:41,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:41,671 INFO L470 AbstractCegarLoop]: Abstraction has 1968 states and 8708 transitions. [2022-02-09 03:01:41,671 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) [2022-02-09 03:01:41,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 8708 transitions. [2022-02-09 03:01:41,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:41,675 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:41,675 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] [2022-02-09 03:01:41,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:41,891 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 [2022-02-09 03:01:41,892 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:41,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:41,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1137016267, now seen corresponding path program 16 times [2022-02-09 03:01:41,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:41,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073440644] [2022-02-09 03:01:41,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:41,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:41,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:41,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073440644] [2022-02-09 03:01:41,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073440644] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:41,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369844025] [2022-02-09 03:01:41,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:01:41,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:41,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:41,991 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) [2022-02-09 03:01:41,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-09 03:01:42,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:01:42,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:42,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:42,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:42,226 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 [2022-02-09 03:01:42,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:42,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:42,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:42,457 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 [2022-02-09 03:01:42,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:01:42,467 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 [2022-02-09 03:01:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:42,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369844025] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:42,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:42,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:01:42,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714507898] [2022-02-09 03:01:42,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:42,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:01:42,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:42,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:01:42,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:01:42,522 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) [2022-02-09 03:01:43,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:43,245 INFO L93 Difference]: Finished difference Result 3178 states and 13290 transitions. [2022-02-09 03:01:43,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-09 03:01:43,246 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 [2022-02-09 03:01:43,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:43,254 INFO L225 Difference]: With dead ends: 3178 [2022-02-09 03:01:43,254 INFO L226 Difference]: Without dead ends: 3150 [2022-02-09 03:01:43,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:01:43,255 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 498 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:43,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 466 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 03:01:43,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3150 states. [2022-02-09 03:01:43,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3150 to 2117. [2022-02-09 03:01:43,295 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) [2022-02-09 03:01:43,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 9423 transitions. [2022-02-09 03:01:43,302 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 9423 transitions. Word has length 29 [2022-02-09 03:01:43,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:43,302 INFO L470 AbstractCegarLoop]: Abstraction has 2117 states and 9423 transitions. [2022-02-09 03:01:43,302 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) [2022-02-09 03:01:43,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 9423 transitions. [2022-02-09 03:01:43,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:43,307 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:43,307 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] [2022-02-09 03:01:43,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:43,521 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 [2022-02-09 03:01:43,522 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:43,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:43,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1537889799, now seen corresponding path program 17 times [2022-02-09 03:01:43,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:43,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203352023] [2022-02-09 03:01:43,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:43,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:43,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:43,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:43,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203352023] [2022-02-09 03:01:43,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203352023] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:43,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552908446] [2022-02-09 03:01:43,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:01:43,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:43,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:43,616 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) [2022-02-09 03:01:43,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-09 03:01:43,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:01:43,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:43,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:43,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:43,781 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 [2022-02-09 03:01:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:43,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:43,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:43,941 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 [2022-02-09 03:01:43,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:01:43,948 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 [2022-02-09 03:01:43,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:43,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552908446] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:43,986 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:43,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:01:43,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233104494] [2022-02-09 03:01:43,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:43,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:01:43,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:43,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:01:43,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:01:43,988 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) [2022-02-09 03:01:44,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:44,615 INFO L93 Difference]: Finished difference Result 3185 states and 13307 transitions. [2022-02-09 03:01:44,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-09 03:01:44,615 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 [2022-02-09 03:01:44,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:44,624 INFO L225 Difference]: With dead ends: 3185 [2022-02-09 03:01:44,624 INFO L226 Difference]: Without dead ends: 3152 [2022-02-09 03:01:44,624 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 [2022-02-09 03:01:44,626 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:44,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 431 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:01:44,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3152 states. [2022-02-09 03:01:44,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3152 to 2007. [2022-02-09 03:01:44,666 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) [2022-02-09 03:01:44,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2007 states to 2007 states and 8900 transitions. [2022-02-09 03:01:44,672 INFO L78 Accepts]: Start accepts. Automaton has 2007 states and 8900 transitions. Word has length 29 [2022-02-09 03:01:44,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:44,672 INFO L470 AbstractCegarLoop]: Abstraction has 2007 states and 8900 transitions. [2022-02-09 03:01:44,672 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) [2022-02-09 03:01:44,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2007 states and 8900 transitions. [2022-02-09 03:01:44,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:44,676 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:44,676 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] [2022-02-09 03:01:44,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:44,892 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 [2022-02-09 03:01:44,892 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:44,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:44,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1175894491, now seen corresponding path program 18 times [2022-02-09 03:01:44,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:44,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106395136] [2022-02-09 03:01:44,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:44,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:44,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:44,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:44,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:44,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106395136] [2022-02-09 03:01:44,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106395136] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:44,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599967494] [2022-02-09 03:01:44,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:01:44,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:44,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:45,004 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) [2022-02-09 03:01:45,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-09 03:01:45,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-09 03:01:45,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:45,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:45,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:45,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:45,143 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 15 treesize of output 19 [2022-02-09 03:01:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:45,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:45,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599967494] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:45,405 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:45,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-09 03:01:45,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076115125] [2022-02-09 03:01:45,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:45,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:01:45,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:45,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:01:45,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:01:45,405 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) [2022-02-09 03:01:45,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:45,808 INFO L93 Difference]: Finished difference Result 2343 states and 10168 transitions. [2022-02-09 03:01:45,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-09 03:01:45,809 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 [2022-02-09 03:01:45,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:45,816 INFO L225 Difference]: With dead ends: 2343 [2022-02-09 03:01:45,816 INFO L226 Difference]: Without dead ends: 2328 [2022-02-09 03:01:45,816 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 [2022-02-09 03:01:45,816 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, 0.3s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:45,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 333 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1127 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-09 03:01:45,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2022-02-09 03:01:45,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 1989. [2022-02-09 03:01:45,849 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) [2022-02-09 03:01:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 8822 transitions. [2022-02-09 03:01:45,855 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 8822 transitions. Word has length 29 [2022-02-09 03:01:45,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:45,855 INFO L470 AbstractCegarLoop]: Abstraction has 1989 states and 8822 transitions. [2022-02-09 03:01:45,855 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) [2022-02-09 03:01:45,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 8822 transitions. [2022-02-09 03:01:45,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:45,859 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:45,859 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] [2022-02-09 03:01:45,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:46,076 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 [2022-02-09 03:01:46,076 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:46,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:46,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1539061893, now seen corresponding path program 19 times [2022-02-09 03:01:46,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:46,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670182373] [2022-02-09 03:01:46,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:46,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:46,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:46,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:46,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670182373] [2022-02-09 03:01:46,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670182373] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:46,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167389292] [2022-02-09 03:01:46,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:01:46,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:46,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:46,152 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) [2022-02-09 03:01:46,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-09 03:01:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:46,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:46,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:46,365 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 [2022-02-09 03:01:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:46,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:46,511 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:46,511 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 [2022-02-09 03:01:46,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:01:46,518 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 [2022-02-09 03:01:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:46,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167389292] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:46,559 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:46,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-09 03:01:46,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526192148] [2022-02-09 03:01:46,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:46,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-09 03:01:46,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:46,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-09 03:01:46,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-02-09 03:01:46,560 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) [2022-02-09 03:01:47,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:47,368 INFO L93 Difference]: Finished difference Result 2370 states and 10258 transitions. [2022-02-09 03:01:47,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-09 03:01:47,369 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 [2022-02-09 03:01:47,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:47,374 INFO L225 Difference]: With dead ends: 2370 [2022-02-09 03:01:47,374 INFO L226 Difference]: Without dead ends: 2355 [2022-02-09 03:01:47,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-02-09 03:01:47,374 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 294 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:47,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 482 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1664 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 03:01:47,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2022-02-09 03:01:47,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 1989. [2022-02-09 03:01:47,399 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) [2022-02-09 03:01:47,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 8822 transitions. [2022-02-09 03:01:47,405 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 8822 transitions. Word has length 29 [2022-02-09 03:01:47,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:47,405 INFO L470 AbstractCegarLoop]: Abstraction has 1989 states and 8822 transitions. [2022-02-09 03:01:47,431 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) [2022-02-09 03:01:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 8822 transitions. [2022-02-09 03:01:47,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:47,435 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:47,435 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] [2022-02-09 03:01:47,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:47,651 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 [2022-02-09 03:01:47,651 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:47,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:47,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1973091239, now seen corresponding path program 20 times [2022-02-09 03:01:47,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:47,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262362818] [2022-02-09 03:01:47,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:47,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:47,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:47,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:47,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262362818] [2022-02-09 03:01:47,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262362818] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:47,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265266417] [2022-02-09 03:01:47,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:01:47,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:47,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:47,755 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) [2022-02-09 03:01:47,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-09 03:01:47,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:01:47,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:47,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:47,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:47,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:47,945 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 [2022-02-09 03:01:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:48,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:48,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265266417] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:48,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:48,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-02-09 03:01:48,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907018113] [2022-02-09 03:01:48,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:48,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-09 03:01:48,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:48,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-09 03:01:48,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-02-09 03:01:48,178 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) [2022-02-09 03:01:48,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:48,725 INFO L93 Difference]: Finished difference Result 2428 states and 10312 transitions. [2022-02-09 03:01:48,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-09 03:01:48,725 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 [2022-02-09 03:01:48,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:48,731 INFO L225 Difference]: With dead ends: 2428 [2022-02-09 03:01:48,732 INFO L226 Difference]: Without dead ends: 2413 [2022-02-09 03:01:48,732 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 [2022-02-09 03:01:48,732 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 246 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-02-09 03:01:48,732 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] [2022-02-09 03:01:48,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2022-02-09 03:01:48,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 1962. [2022-02-09 03:01:48,774 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) [2022-02-09 03:01:48,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 8724 transitions. [2022-02-09 03:01:48,781 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 8724 transitions. Word has length 29 [2022-02-09 03:01:48,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:48,781 INFO L470 AbstractCegarLoop]: Abstraction has 1962 states and 8724 transitions. [2022-02-09 03:01:48,781 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) [2022-02-09 03:01:48,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 8724 transitions. [2022-02-09 03:01:48,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:48,785 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:48,785 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] [2022-02-09 03:01:48,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:49,006 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 [2022-02-09 03:01:49,007 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:49,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:49,007 INFO L85 PathProgramCache]: Analyzing trace with hash 2139067589, now seen corresponding path program 21 times [2022-02-09 03:01:49,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:49,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800148152] [2022-02-09 03:01:49,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:49,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:49,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:49,134 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:49,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800148152] [2022-02-09 03:01:49,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800148152] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:49,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376902050] [2022-02-09 03:01:49,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:01:49,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:49,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:49,135 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) [2022-02-09 03:01:49,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-09 03:01:49,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-09 03:01:49,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:49,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:49,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:49,258 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:49,258 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 [2022-02-09 03:01:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:49,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:49,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:49,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376902050] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:49,511 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:49,512 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-09 03:01:49,512 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004513056] [2022-02-09 03:01:49,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:49,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:01:49,512 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:49,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:01:49,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:01:49,513 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) [2022-02-09 03:01:50,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:50,107 INFO L93 Difference]: Finished difference Result 2348 states and 10185 transitions. [2022-02-09 03:01:50,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-09 03:01:50,108 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 [2022-02-09 03:01:50,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:50,115 INFO L225 Difference]: With dead ends: 2348 [2022-02-09 03:01:50,115 INFO L226 Difference]: Without dead ends: 2329 [2022-02-09 03:01:50,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-02-09 03:01:50,116 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:50,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 333 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:01:50,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2329 states. [2022-02-09 03:01:50,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2329 to 1998. [2022-02-09 03:01:50,152 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) [2022-02-09 03:01:50,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1998 states to 1998 states and 8889 transitions. [2022-02-09 03:01:50,159 INFO L78 Accepts]: Start accepts. Automaton has 1998 states and 8889 transitions. Word has length 29 [2022-02-09 03:01:50,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:50,159 INFO L470 AbstractCegarLoop]: Abstraction has 1998 states and 8889 transitions. [2022-02-09 03:01:50,159 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) [2022-02-09 03:01:50,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1998 states and 8889 transitions. [2022-02-09 03:01:50,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:50,163 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:50,163 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] [2022-02-09 03:01:50,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:50,364 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 [2022-02-09 03:01:50,364 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:50,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:50,365 INFO L85 PathProgramCache]: Analyzing trace with hash -733544881, now seen corresponding path program 22 times [2022-02-09 03:01:50,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:50,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938365779] [2022-02-09 03:01:50,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:50,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:50,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:50,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938365779] [2022-02-09 03:01:50,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938365779] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:50,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879878691] [2022-02-09 03:01:50,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:01:50,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:50,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:50,507 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-09 03:01:50,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-09 03:01:50,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:01:50,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:50,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:50,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:50,656 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 [2022-02-09 03:01:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:50,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:50,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:50,942 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 [2022-02-09 03:01:50,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:01:50,955 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 [2022-02-09 03:01:51,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:51,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879878691] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:51,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:51,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:01:51,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139757520] [2022-02-09 03:01:51,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:51,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:01:51,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:51,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:01:51,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:01:51,039 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) [2022-02-09 03:01:51,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:51,880 INFO L93 Difference]: Finished difference Result 2888 states and 12212 transitions. [2022-02-09 03:01:51,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-09 03:01:51,880 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 [2022-02-09 03:01:51,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:51,888 INFO L225 Difference]: With dead ends: 2888 [2022-02-09 03:01:51,888 INFO L226 Difference]: Without dead ends: 2860 [2022-02-09 03:01:51,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:01:51,894 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 337 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 1395 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:51,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 422 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1395 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-09 03:01:51,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2022-02-09 03:01:51,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 2123. [2022-02-09 03:01:51,935 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) [2022-02-09 03:01:51,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 9471 transitions. [2022-02-09 03:01:51,942 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 9471 transitions. Word has length 29 [2022-02-09 03:01:51,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:51,942 INFO L470 AbstractCegarLoop]: Abstraction has 2123 states and 9471 transitions. [2022-02-09 03:01:51,942 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) [2022-02-09 03:01:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 9471 transitions. [2022-02-09 03:01:51,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:51,948 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:51,948 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] [2022-02-09 03:01:51,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:52,161 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 [2022-02-09 03:01:52,161 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:52,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:52,162 INFO L85 PathProgramCache]: Analyzing trace with hash -332671349, now seen corresponding path program 23 times [2022-02-09 03:01:52,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:52,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635067983] [2022-02-09 03:01:52,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:52,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:52,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:52,318 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:52,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635067983] [2022-02-09 03:01:52,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635067983] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:52,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574995506] [2022-02-09 03:01:52,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:01:52,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:52,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:52,320 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) [2022-02-09 03:01:52,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-09 03:01:52,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:01:52,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:52,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:52,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:52,495 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 [2022-02-09 03:01:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:52,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:52,754 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:52,755 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 [2022-02-09 03:01:52,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:01:52,765 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 [2022-02-09 03:01:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:52,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574995506] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:52,820 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:52,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:01:52,820 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360855214] [2022-02-09 03:01:52,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:52,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:01:52,820 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:52,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:01:52,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:01:52,821 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) [2022-02-09 03:01:53,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:53,664 INFO L93 Difference]: Finished difference Result 2895 states and 12229 transitions. [2022-02-09 03:01:53,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-09 03:01:53,665 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 [2022-02-09 03:01:53,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:53,673 INFO L225 Difference]: With dead ends: 2895 [2022-02-09 03:01:53,674 INFO L226 Difference]: Without dead ends: 2862 [2022-02-09 03:01:53,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:01:53,674 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:53,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 388 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1281 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 03:01:53,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2862 states. [2022-02-09 03:01:53,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2862 to 2028. [2022-02-09 03:01:53,715 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) [2022-02-09 03:01:53,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 9043 transitions. [2022-02-09 03:01:53,723 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 9043 transitions. Word has length 29 [2022-02-09 03:01:53,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:53,723 INFO L470 AbstractCegarLoop]: Abstraction has 2028 states and 9043 transitions. [2022-02-09 03:01:53,723 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) [2022-02-09 03:01:53,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 9043 transitions. [2022-02-09 03:01:53,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:53,728 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:53,728 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] [2022-02-09 03:01:53,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:53,935 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 [2022-02-09 03:01:53,936 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:53,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:53,936 INFO L85 PathProgramCache]: Analyzing trace with hash -694666657, now seen corresponding path program 24 times [2022-02-09 03:01:53,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:53,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513291686] [2022-02-09 03:01:53,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:53,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:54,037 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:54,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513291686] [2022-02-09 03:01:54,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513291686] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:54,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442035024] [2022-02-09 03:01:54,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:01:54,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:54,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:54,038 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) [2022-02-09 03:01:54,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-09 03:01:54,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-09 03:01:54,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:54,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:54,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:54,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:54,189 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 [2022-02-09 03:01:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:54,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:54,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:54,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442035024] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:54,585 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:54,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-09 03:01:54,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251989797] [2022-02-09 03:01:54,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:54,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:01:54,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:54,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:01:54,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:01:54,586 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) [2022-02-09 03:01:55,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:55,040 INFO L93 Difference]: Finished difference Result 2182 states and 9610 transitions. [2022-02-09 03:01:55,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-09 03:01:55,040 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 [2022-02-09 03:01:55,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:55,045 INFO L225 Difference]: With dead ends: 2182 [2022-02-09 03:01:55,046 INFO L226 Difference]: Without dead ends: 2167 [2022-02-09 03:01:55,046 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 [2022-02-09 03:01:55,047 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 [2022-02-09 03:01:55,047 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] [2022-02-09 03:01:55,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2022-02-09 03:01:55,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 2007. [2022-02-09 03:01:55,078 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) [2022-02-09 03:01:55,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2007 states to 2007 states and 8955 transitions. [2022-02-09 03:01:55,086 INFO L78 Accepts]: Start accepts. Automaton has 2007 states and 8955 transitions. Word has length 29 [2022-02-09 03:01:55,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:55,086 INFO L470 AbstractCegarLoop]: Abstraction has 2007 states and 8955 transitions. [2022-02-09 03:01:55,086 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) [2022-02-09 03:01:55,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2007 states and 8955 transitions. [2022-02-09 03:01:55,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:55,090 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:55,090 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] [2022-02-09 03:01:55,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:55,291 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 [2022-02-09 03:01:55,292 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:55,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:55,292 INFO L85 PathProgramCache]: Analyzing trace with hash -2058717311, now seen corresponding path program 25 times [2022-02-09 03:01:55,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:55,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562791478] [2022-02-09 03:01:55,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:55,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:55,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:55,403 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:55,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562791478] [2022-02-09 03:01:55,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562791478] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:55,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173217590] [2022-02-09 03:01:55,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:01:55,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:55,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:55,404 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) [2022-02-09 03:01:55,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-09 03:01:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:55,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:55,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:55,557 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 [2022-02-09 03:01:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:55,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:55,810 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:55,810 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 [2022-02-09 03:01:55,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:01:55,822 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-02-09 03:01:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:55,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173217590] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:55,881 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:55,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-02-09 03:01:55,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862860191] [2022-02-09 03:01:55,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:55,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:01:55,881 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:55,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:01:55,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:01:55,882 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) [2022-02-09 03:01:56,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:56,879 INFO L93 Difference]: Finished difference Result 2978 states and 12458 transitions. [2022-02-09 03:01:56,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-09 03:01:56,879 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 [2022-02-09 03:01:56,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:56,887 INFO L225 Difference]: With dead ends: 2978 [2022-02-09 03:01:56,887 INFO L226 Difference]: Without dead ends: 2940 [2022-02-09 03:01:56,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-02-09 03:01:56,887 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 522 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:56,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 424 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-09 03:01:56,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2022-02-09 03:01:56,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2133. [2022-02-09 03:01:56,928 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) [2022-02-09 03:01:56,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2133 states to 2133 states and 9537 transitions. [2022-02-09 03:01:56,934 INFO L78 Accepts]: Start accepts. Automaton has 2133 states and 9537 transitions. Word has length 29 [2022-02-09 03:01:56,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:56,935 INFO L470 AbstractCegarLoop]: Abstraction has 2133 states and 9537 transitions. [2022-02-09 03:01:56,935 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) [2022-02-09 03:01:56,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2133 states and 9537 transitions. [2022-02-09 03:01:56,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:56,939 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:56,939 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] [2022-02-09 03:01:56,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:57,155 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 [2022-02-09 03:01:57,155 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:57,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:57,156 INFO L85 PathProgramCache]: Analyzing trace with hash -636362485, now seen corresponding path program 26 times [2022-02-09 03:01:57,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:57,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147487543] [2022-02-09 03:01:57,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:57,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:57,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:57,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:57,255 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:57,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147487543] [2022-02-09 03:01:57,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147487543] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:57,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086100588] [2022-02-09 03:01:57,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:01:57,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:57,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:57,257 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) [2022-02-09 03:01:57,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-09 03:01:57,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:01:57,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:57,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:57,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:57,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:57,404 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 [2022-02-09 03:01:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:57,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:57,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086100588] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:57,798 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:57,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-02-09 03:01:57,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945886493] [2022-02-09 03:01:57,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:57,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:01:57,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:57,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:01:57,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:01:57,799 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) [2022-02-09 03:01:58,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:58,344 INFO L93 Difference]: Finished difference Result 2472 states and 10662 transitions. [2022-02-09 03:01:58,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-09 03:01:58,345 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 [2022-02-09 03:01:58,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:58,351 INFO L225 Difference]: With dead ends: 2472 [2022-02-09 03:01:58,352 INFO L226 Difference]: Without dead ends: 2459 [2022-02-09 03:01:58,352 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 [2022-02-09 03:01:58,352 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 [2022-02-09 03:01:58,352 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] [2022-02-09 03:01:58,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2022-02-09 03:01:58,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2133. [2022-02-09 03:01:58,398 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) [2022-02-09 03:01:58,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2133 states to 2133 states and 9534 transitions. [2022-02-09 03:01:58,405 INFO L78 Accepts]: Start accepts. Automaton has 2133 states and 9534 transitions. Word has length 29 [2022-02-09 03:01:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:58,405 INFO L470 AbstractCegarLoop]: Abstraction has 2133 states and 9534 transitions. [2022-02-09 03:01:58,405 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) [2022-02-09 03:01:58,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2133 states and 9534 transitions. [2022-02-09 03:01:58,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:58,409 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:58,409 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] [2022-02-09 03:01:58,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-02-09 03:01:58,625 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 [2022-02-09 03:01:58,625 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:01:58,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:01:58,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1081464505, now seen corresponding path program 27 times [2022-02-09 03:01:58,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:01:58,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466664280] [2022-02-09 03:01:58,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:01:58,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:01:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:01:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:58,738 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:01:58,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466664280] [2022-02-09 03:01:58,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466664280] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:01:58,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593530169] [2022-02-09 03:01:58,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:01:58,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:01:58,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:01:58,739 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) [2022-02-09 03:01:58,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-09 03:01:58,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-09 03:01:58,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:01:58,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:01:58,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:01:58,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:01:58,892 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 [2022-02-09 03:01:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:59,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:01:59,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:01:59,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593530169] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:01:59,307 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:01:59,307 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-09 03:01:59,307 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57863109] [2022-02-09 03:01:59,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:01:59,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:01:59,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:01:59,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:01:59,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:01:59,308 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) [2022-02-09 03:01:59,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:01:59,933 INFO L93 Difference]: Finished difference Result 2427 states and 10549 transitions. [2022-02-09 03:01:59,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-09 03:01:59,934 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 [2022-02-09 03:01:59,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:01:59,940 INFO L225 Difference]: With dead ends: 2427 [2022-02-09 03:01:59,940 INFO L226 Difference]: Without dead ends: 2399 [2022-02-09 03:01:59,940 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 [2022-02-09 03:01:59,940 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 279 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:01:59,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 280 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:01:59,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2022-02-09 03:01:59,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2079. [2022-02-09 03:01:59,971 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) [2022-02-09 03:01:59,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 9294 transitions. [2022-02-09 03:01:59,978 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 9294 transitions. Word has length 29 [2022-02-09 03:01:59,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:01:59,978 INFO L470 AbstractCegarLoop]: Abstraction has 2079 states and 9294 transitions. [2022-02-09 03:01:59,978 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) [2022-02-09 03:01:59,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 9294 transitions. [2022-02-09 03:01:59,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:01:59,982 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:01:59,982 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] [2022-02-09 03:02:00,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:00,183 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 [2022-02-09 03:02:00,183 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:00,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:00,183 INFO L85 PathProgramCache]: Analyzing trace with hash 484686529, now seen corresponding path program 28 times [2022-02-09 03:02:00,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:00,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958300188] [2022-02-09 03:02:00,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:00,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:00,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:00,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:00,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958300188] [2022-02-09 03:02:00,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958300188] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:00,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106191810] [2022-02-09 03:02:00,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:02:00,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:00,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:00,307 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) [2022-02-09 03:02:00,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-09 03:02:00,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:02:00,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:00,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:00,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:00,519 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 [2022-02-09 03:02:00,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:00,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:00,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:00,818 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 [2022-02-09 03:02:00,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:02:00,831 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-02-09 03:02:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:00,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106191810] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:00,893 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:00,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-09 03:02:00,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63836200] [2022-02-09 03:02:00,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:00,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-09 03:02:00,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:00,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-09 03:02:00,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-02-09 03:02:00,894 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) [2022-02-09 03:02:01,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:01,973 INFO L93 Difference]: Finished difference Result 2708 states and 11522 transitions. [2022-02-09 03:02:01,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-09 03:02:01,974 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 [2022-02-09 03:02:01,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:01,981 INFO L225 Difference]: With dead ends: 2708 [2022-02-09 03:02:01,982 INFO L226 Difference]: Without dead ends: 2670 [2022-02-09 03:02:01,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2022-02-09 03:02:01,982 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 376 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 2041 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:02:01,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 632 Invalid, 2097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2041 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-09 03:02:01,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2670 states. [2022-02-09 03:02:02,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2670 to 2082. [2022-02-09 03:02:02,020 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) [2022-02-09 03:02:02,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 9303 transitions. [2022-02-09 03:02:02,027 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 9303 transitions. Word has length 29 [2022-02-09 03:02:02,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:02,027 INFO L470 AbstractCegarLoop]: Abstraction has 2082 states and 9303 transitions. [2022-02-09 03:02:02,027 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) [2022-02-09 03:02:02,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 9303 transitions. [2022-02-09 03:02:02,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:02,031 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:02,031 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] [2022-02-09 03:02:02,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:02,248 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 [2022-02-09 03:02:02,248 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:02,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:02,248 INFO L85 PathProgramCache]: Analyzing trace with hash -838291121, now seen corresponding path program 29 times [2022-02-09 03:02:02,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:02,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559383805] [2022-02-09 03:02:02,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:02,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:02,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:02,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559383805] [2022-02-09 03:02:02,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559383805] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:02,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161871672] [2022-02-09 03:02:02,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:02:02,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:02,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:02,356 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) [2022-02-09 03:02:02,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-09 03:02:02,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-09 03:02:02,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:02,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-09 03:02:02,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:02,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:02,520 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 [2022-02-09 03:02:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:02,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:02,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:02,823 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 [2022-02-09 03:02:02,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:02:02,831 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-02-09 03:02:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:02,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161871672] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:02,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:02,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-02-09 03:02:02,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30616626] [2022-02-09 03:02:02,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:02,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-09 03:02:02,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:02,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-09 03:02:02,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-02-09 03:02:02,888 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) [2022-02-09 03:02:03,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:03,412 INFO L93 Difference]: Finished difference Result 2482 states and 10735 transitions. [2022-02-09 03:02:03,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-09 03:02:03,412 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 [2022-02-09 03:02:03,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:03,419 INFO L225 Difference]: With dead ends: 2482 [2022-02-09 03:02:03,419 INFO L226 Difference]: Without dead ends: 2456 [2022-02-09 03:02:03,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2022-02-09 03:02:03,420 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-09 03:02:03,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 412 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 807 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2022-02-09 03:02:03,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2022-02-09 03:02:03,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 2114. [2022-02-09 03:02:03,510 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) [2022-02-09 03:02:03,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 9450 transitions. [2022-02-09 03:02:03,523 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 9450 transitions. Word has length 29 [2022-02-09 03:02:03,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:03,523 INFO L470 AbstractCegarLoop]: Abstraction has 2114 states and 9450 transitions. [2022-02-09 03:02:03,524 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) [2022-02-09 03:02:03,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 9450 transitions. [2022-02-09 03:02:03,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:03,528 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:03,528 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] [2022-02-09 03:02:03,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:03,728 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 [2022-02-09 03:02:03,728 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:03,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:03,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1504652747, now seen corresponding path program 30 times [2022-02-09 03:02:03,729 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:03,729 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050779910] [2022-02-09 03:02:03,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:03,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:03,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:03,798 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:03,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050779910] [2022-02-09 03:02:03,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050779910] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:03,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925646792] [2022-02-09 03:02:03,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:02:03,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:03,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:03,799 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) [2022-02-09 03:02:03,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-09 03:02:03,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-09 03:02:03,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:03,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-09 03:02:03,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:03,964 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 [2022-02-09 03:02:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:04,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:04,173 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:04,174 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 [2022-02-09 03:02:04,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:02:04,184 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 [2022-02-09 03:02:04,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:04,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925646792] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:04,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:04,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:02:04,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432792297] [2022-02-09 03:02:04,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:04,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:02:04,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:04,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:02:04,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:02:04,226 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) [2022-02-09 03:02:04,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:04,885 INFO L93 Difference]: Finished difference Result 2705 states and 11560 transitions. [2022-02-09 03:02:04,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-09 03:02:04,885 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 [2022-02-09 03:02:04,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:04,892 INFO L225 Difference]: With dead ends: 2705 [2022-02-09 03:02:04,893 INFO L226 Difference]: Without dead ends: 2683 [2022-02-09 03:02:04,893 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 [2022-02-09 03:02:04,894 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 321 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:02:04,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 381 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:02:04,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2683 states. [2022-02-09 03:02:04,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2683 to 2067. [2022-02-09 03:02:04,932 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) [2022-02-09 03:02:04,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 9249 transitions. [2022-02-09 03:02:04,939 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 9249 transitions. Word has length 29 [2022-02-09 03:02:04,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:04,940 INFO L470 AbstractCegarLoop]: Abstraction has 2067 states and 9249 transitions. [2022-02-09 03:02:04,940 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) [2022-02-09 03:02:04,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 9249 transitions. [2022-02-09 03:02:04,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:04,944 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:04,944 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] [2022-02-09 03:02:04,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:05,160 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 [2022-02-09 03:02:05,161 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:05,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:05,161 INFO L85 PathProgramCache]: Analyzing trace with hash -2032401569, now seen corresponding path program 1 times [2022-02-09 03:02:05,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:05,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292734510] [2022-02-09 03:02:05,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:05,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:05,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:05,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292734510] [2022-02-09 03:02:05,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292734510] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:05,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118246343] [2022-02-09 03:02:05,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:05,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:05,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:05,267 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) [2022-02-09 03:02:05,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-09 03:02:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:05,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:05,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:05,472 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 [2022-02-09 03:02:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:05,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:05,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:05,627 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 [2022-02-09 03:02:05,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:02:05,633 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 [2022-02-09 03:02:05,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:05,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118246343] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:05,656 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:05,656 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-09 03:02:05,656 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782775332] [2022-02-09 03:02:05,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:05,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-09 03:02:05,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:05,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-09 03:02:05,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-02-09 03:02:05,672 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) [2022-02-09 03:02:06,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:06,457 INFO L93 Difference]: Finished difference Result 2547 states and 11053 transitions. [2022-02-09 03:02:06,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-09 03:02:06,457 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 [2022-02-09 03:02:06,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:06,464 INFO L225 Difference]: With dead ends: 2547 [2022-02-09 03:02:06,464 INFO L226 Difference]: Without dead ends: 2528 [2022-02-09 03:02:06,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-02-09 03:02:06,469 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 361 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 1588 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:02:06,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 427 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1588 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 03:02:06,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2022-02-09 03:02:06,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 2169. [2022-02-09 03:02:06,503 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) [2022-02-09 03:02:06,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 9660 transitions. [2022-02-09 03:02:06,510 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 9660 transitions. Word has length 29 [2022-02-09 03:02:06,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:06,510 INFO L470 AbstractCegarLoop]: Abstraction has 2169 states and 9660 transitions. [2022-02-09 03:02:06,510 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) [2022-02-09 03:02:06,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 9660 transitions. [2022-02-09 03:02:06,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:06,514 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:06,514 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] [2022-02-09 03:02:06,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:06,727 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 [2022-02-09 03:02:06,727 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:06,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:06,728 INFO L85 PathProgramCache]: Analyzing trace with hash -2037171777, now seen corresponding path program 1 times [2022-02-09 03:02:06,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:06,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61743620] [2022-02-09 03:02:06,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:06,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:06,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:06,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61743620] [2022-02-09 03:02:06,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61743620] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:06,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390676132] [2022-02-09 03:02:06,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:06,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:06,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:06,826 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) [2022-02-09 03:02:06,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-09 03:02:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:06,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:06,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:07,007 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 [2022-02-09 03:02:07,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:07,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:07,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:07,179 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 [2022-02-09 03:02:07,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:02:07,196 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 [2022-02-09 03:02:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:07,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390676132] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:07,234 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:07,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-09 03:02:07,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602330634] [2022-02-09 03:02:07,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:07,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-09 03:02:07,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:07,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-09 03:02:07,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-02-09 03:02:07,235 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) [2022-02-09 03:02:08,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:08,250 INFO L93 Difference]: Finished difference Result 2568 states and 11112 transitions. [2022-02-09 03:02:08,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-09 03:02:08,250 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 [2022-02-09 03:02:08,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:08,257 INFO L225 Difference]: With dead ends: 2568 [2022-02-09 03:02:08,258 INFO L226 Difference]: Without dead ends: 2549 [2022-02-09 03:02:08,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-02-09 03:02:08,260 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 340 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-02-09 03:02:08,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 419 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1500 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-09 03:02:08,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2022-02-09 03:02:08,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 2171. [2022-02-09 03:02:08,314 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) [2022-02-09 03:02:08,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 9668 transitions. [2022-02-09 03:02:08,321 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 9668 transitions. Word has length 29 [2022-02-09 03:02:08,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:08,321 INFO L470 AbstractCegarLoop]: Abstraction has 2171 states and 9668 transitions. [2022-02-09 03:02:08,321 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) [2022-02-09 03:02:08,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 9668 transitions. [2022-02-09 03:02:08,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:08,325 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:08,325 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] [2022-02-09 03:02:08,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:08,555 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 [2022-02-09 03:02:08,556 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:08,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:08,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1254794295, now seen corresponding path program 2 times [2022-02-09 03:02:08,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:08,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662219436] [2022-02-09 03:02:08,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:08,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:08,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:08,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:08,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662219436] [2022-02-09 03:02:08,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662219436] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:08,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697807620] [2022-02-09 03:02:08,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:02:08,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:08,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:08,668 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) [2022-02-09 03:02:08,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-09 03:02:08,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:02:08,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:08,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:08,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:08,919 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:08,920 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 [2022-02-09 03:02:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:09,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:09,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:09,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697807620] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:09,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:09,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-09 03:02:09,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3347467] [2022-02-09 03:02:09,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:09,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:02:09,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:09,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:02:09,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:02:09,212 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) [2022-02-09 03:02:09,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:09,723 INFO L93 Difference]: Finished difference Result 2471 states and 10753 transitions. [2022-02-09 03:02:09,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-09 03:02:09,723 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 [2022-02-09 03:02:09,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:09,730 INFO L225 Difference]: With dead ends: 2471 [2022-02-09 03:02:09,730 INFO L226 Difference]: Without dead ends: 2452 [2022-02-09 03:02:09,730 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 [2022-02-09 03:02:09,731 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 133 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:02:09,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 323 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:02:09,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2022-02-09 03:02:09,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2171. [2022-02-09 03:02:09,792 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) [2022-02-09 03:02:09,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 9668 transitions. [2022-02-09 03:02:09,799 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 9668 transitions. Word has length 29 [2022-02-09 03:02:09,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:09,799 INFO L470 AbstractCegarLoop]: Abstraction has 2171 states and 9668 transitions. [2022-02-09 03:02:09,799 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) [2022-02-09 03:02:09,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 9668 transitions. [2022-02-09 03:02:09,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:09,806 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:09,807 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] [2022-02-09 03:02:09,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-02-09 03:02:10,030 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 [2022-02-09 03:02:10,030 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:10,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:10,031 INFO L85 PathProgramCache]: Analyzing trace with hash 691196871, now seen corresponding path program 3 times [2022-02-09 03:02:10,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:10,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498824336] [2022-02-09 03:02:10,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:10,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:10,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:10,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:10,151 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:10,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498824336] [2022-02-09 03:02:10,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498824336] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:10,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53386964] [2022-02-09 03:02:10,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:02:10,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:10,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:10,153 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) [2022-02-09 03:02:10,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-09 03:02:10,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-09 03:02:10,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:10,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:10,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:10,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:10,484 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-02-09 03:02:10,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:10,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:10,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:10,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53386964] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:10,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:10,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-09 03:02:10,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550272980] [2022-02-09 03:02:10,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:10,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:02:10,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:10,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:02:10,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:02:10,694 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) [2022-02-09 03:02:11,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:11,127 INFO L93 Difference]: Finished difference Result 2498 states and 10814 transitions. [2022-02-09 03:02:11,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-09 03:02:11,127 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 [2022-02-09 03:02:11,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:11,133 INFO L225 Difference]: With dead ends: 2498 [2022-02-09 03:02:11,133 INFO L226 Difference]: Without dead ends: 2479 [2022-02-09 03:02:11,134 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 [2022-02-09 03:02:11,138 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 [2022-02-09 03:02:11,138 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] [2022-02-09 03:02:11,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2022-02-09 03:02:11,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 2174. [2022-02-09 03:02:11,169 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) [2022-02-09 03:02:11,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 9678 transitions. [2022-02-09 03:02:11,175 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 9678 transitions. Word has length 29 [2022-02-09 03:02:11,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:11,176 INFO L470 AbstractCegarLoop]: Abstraction has 2174 states and 9678 transitions. [2022-02-09 03:02:11,176 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) [2022-02-09 03:02:11,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 9678 transitions. [2022-02-09 03:02:11,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:11,180 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:11,180 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] [2022-02-09 03:02:11,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:11,396 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 [2022-02-09 03:02:11,396 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:11,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:11,397 INFO L85 PathProgramCache]: Analyzing trace with hash 319971865, now seen corresponding path program 4 times [2022-02-09 03:02:11,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:11,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102851788] [2022-02-09 03:02:11,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:11,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:11,488 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:11,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102851788] [2022-02-09 03:02:11,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102851788] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:11,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391717092] [2022-02-09 03:02:11,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:02:11,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:11,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:11,490 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) [2022-02-09 03:02:11,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-09 03:02:11,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:02:11,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:11,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:11,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:11,729 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 [2022-02-09 03:02:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:11,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:11,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:11,967 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-02-09 03:02:11,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:02:11,977 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 [2022-02-09 03:02:12,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:12,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391717092] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:12,010 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:12,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:02:12,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802968051] [2022-02-09 03:02:12,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:12,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:02:12,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:12,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:02:12,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:02:12,011 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) [2022-02-09 03:02:12,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:12,937 INFO L93 Difference]: Finished difference Result 3172 states and 13428 transitions. [2022-02-09 03:02:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-09 03:02:12,937 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 [2022-02-09 03:02:12,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:12,946 INFO L225 Difference]: With dead ends: 3172 [2022-02-09 03:02:12,946 INFO L226 Difference]: Without dead ends: 3144 [2022-02-09 03:02:12,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2022-02-09 03:02:12,946 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 366 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-02-09 03:02:12,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 456 Invalid, 1525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-09 03:02:12,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2022-02-09 03:02:12,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 2296. [2022-02-09 03:02:12,990 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) [2022-02-09 03:02:12,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 10293 transitions. [2022-02-09 03:02:12,997 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 10293 transitions. Word has length 29 [2022-02-09 03:02:12,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:12,997 INFO L470 AbstractCegarLoop]: Abstraction has 2296 states and 10293 transitions. [2022-02-09 03:02:12,997 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) [2022-02-09 03:02:12,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 10293 transitions. [2022-02-09 03:02:13,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:13,002 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:13,002 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] [2022-02-09 03:02:13,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:13,219 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 [2022-02-09 03:02:13,219 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:13,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:13,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1267603755, now seen corresponding path program 2 times [2022-02-09 03:02:13,219 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:13,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242730815] [2022-02-09 03:02:13,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:13,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:13,323 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:13,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242730815] [2022-02-09 03:02:13,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242730815] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:13,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575342016] [2022-02-09 03:02:13,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:02:13,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:13,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:13,325 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) [2022-02-09 03:02:13,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-09 03:02:13,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:02:13,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:13,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:13,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:13,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:13,564 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 [2022-02-09 03:02:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:13,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:13,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:13,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575342016] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:13,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:13,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-09 03:02:13,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271950164] [2022-02-09 03:02:13,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:13,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:02:13,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:13,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:02:13,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:02:13,927 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) [2022-02-09 03:02:14,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:14,409 INFO L93 Difference]: Finished difference Result 2614 states and 11429 transitions. [2022-02-09 03:02:14,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-09 03:02:14,409 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 [2022-02-09 03:02:14,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:14,416 INFO L225 Difference]: With dead ends: 2614 [2022-02-09 03:02:14,416 INFO L226 Difference]: Without dead ends: 2595 [2022-02-09 03:02:14,416 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 [2022-02-09 03:02:14,416 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:02:14,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 373 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:02:14,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2022-02-09 03:02:14,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 2299. [2022-02-09 03:02:14,449 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) [2022-02-09 03:02:14,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 10302 transitions. [2022-02-09 03:02:14,455 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 10302 transitions. Word has length 29 [2022-02-09 03:02:14,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:14,455 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 10302 transitions. [2022-02-09 03:02:14,455 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) [2022-02-09 03:02:14,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 10302 transitions. [2022-02-09 03:02:14,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:14,461 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:14,461 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] [2022-02-09 03:02:14,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-02-09 03:02:14,663 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 [2022-02-09 03:02:14,663 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:14,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:14,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1477728721, now seen corresponding path program 3 times [2022-02-09 03:02:14,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:14,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618139109] [2022-02-09 03:02:14,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:14,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:14,770 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:14,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618139109] [2022-02-09 03:02:14,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618139109] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:14,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659963020] [2022-02-09 03:02:14,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:02:14,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:14,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:14,772 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) [2022-02-09 03:02:14,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-09 03:02:14,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-09 03:02:14,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:14,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:14,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:14,998 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:14,998 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 16 treesize of output 20 [2022-02-09 03:02:15,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:15,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:15,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659963020] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:15,243 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:15,243 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-09 03:02:15,243 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767743799] [2022-02-09 03:02:15,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:15,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:02:15,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:15,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:02:15,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:02:15,244 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) [2022-02-09 03:02:15,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:15,698 INFO L93 Difference]: Finished difference Result 2653 states and 11530 transitions. [2022-02-09 03:02:15,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-09 03:02:15,698 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 [2022-02-09 03:02:15,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:15,707 INFO L225 Difference]: With dead ends: 2653 [2022-02-09 03:02:15,708 INFO L226 Difference]: Without dead ends: 2634 [2022-02-09 03:02:15,708 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 [2022-02-09 03:02:15,708 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 [2022-02-09 03:02:15,708 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] [2022-02-09 03:02:15,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2022-02-09 03:02:15,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 2299. [2022-02-09 03:02:15,747 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) [2022-02-09 03:02:15,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 10302 transitions. [2022-02-09 03:02:15,794 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 10302 transitions. Word has length 29 [2022-02-09 03:02:15,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:15,794 INFO L470 AbstractCegarLoop]: Abstraction has 2299 states and 10302 transitions. [2022-02-09 03:02:15,794 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) [2022-02-09 03:02:15,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 10302 transitions. [2022-02-09 03:02:15,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:15,799 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:15,800 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] [2022-02-09 03:02:15,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:16,015 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 [2022-02-09 03:02:16,015 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:16,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:16,016 INFO L85 PathProgramCache]: Analyzing trace with hash -55373895, now seen corresponding path program 4 times [2022-02-09 03:02:16,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:16,016 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909136262] [2022-02-09 03:02:16,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:16,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:16,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:16,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909136262] [2022-02-09 03:02:16,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909136262] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:16,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760298394] [2022-02-09 03:02:16,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:02:16,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:16,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:16,116 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) [2022-02-09 03:02:16,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-09 03:02:16,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:02:16,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:16,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:16,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:16,277 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 [2022-02-09 03:02:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:16,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:16,454 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:16,455 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 [2022-02-09 03:02:16,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:02:16,462 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 [2022-02-09 03:02:16,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:16,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760298394] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:16,491 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:16,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:02:16,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974728207] [2022-02-09 03:02:16,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:16,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:02:16,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:16,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:02:16,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:02:16,492 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) [2022-02-09 03:02:17,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:17,586 INFO L93 Difference]: Finished difference Result 3425 states and 14506 transitions. [2022-02-09 03:02:17,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-09 03:02:17,586 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 [2022-02-09 03:02:17,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:17,595 INFO L225 Difference]: With dead ends: 3425 [2022-02-09 03:02:17,595 INFO L226 Difference]: Without dead ends: 3397 [2022-02-09 03:02:17,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2022-02-09 03:02:17,595 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 336 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:02:17,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 545 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-09 03:02:17,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3397 states. [2022-02-09 03:02:17,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3397 to 2390. [2022-02-09 03:02:17,653 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) [2022-02-09 03:02:17,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 10755 transitions. [2022-02-09 03:02:17,661 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 10755 transitions. Word has length 29 [2022-02-09 03:02:17,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:17,661 INFO L470 AbstractCegarLoop]: Abstraction has 2390 states and 10755 transitions. [2022-02-09 03:02:17,661 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) [2022-02-09 03:02:17,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 10755 transitions. [2022-02-09 03:02:17,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:17,666 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:17,666 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] [2022-02-09 03:02:17,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:17,882 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 [2022-02-09 03:02:17,882 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:17,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:17,882 INFO L85 PathProgramCache]: Analyzing trace with hash 11294687, now seen corresponding path program 5 times [2022-02-09 03:02:17,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:17,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577901976] [2022-02-09 03:02:17,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:17,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:17,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:17,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577901976] [2022-02-09 03:02:17,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577901976] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:17,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57123447] [2022-02-09 03:02:17,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:02:17,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:17,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:17,987 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) [2022-02-09 03:02:17,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-09 03:02:18,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:02:18,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:18,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-09 03:02:18,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:18,205 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 [2022-02-09 03:02:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:18,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:18,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:18,510 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 [2022-02-09 03:02:18,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:02:18,520 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 [2022-02-09 03:02:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:18,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57123447] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:18,557 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:18,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-09 03:02:18,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425781388] [2022-02-09 03:02:18,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:18,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-09 03:02:18,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:18,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-09 03:02:18,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-02-09 03:02:18,558 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) [2022-02-09 03:02:19,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:19,919 INFO L93 Difference]: Finished difference Result 3525 states and 14857 transitions. [2022-02-09 03:02:19,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-09 03:02:19,920 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 [2022-02-09 03:02:19,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:19,929 INFO L225 Difference]: With dead ends: 3525 [2022-02-09 03:02:19,929 INFO L226 Difference]: Without dead ends: 3452 [2022-02-09 03:02:19,930 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 [2022-02-09 03:02:19,930 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 477 mSDsluCounter, 1565 mSDsCounter, 0 mSdLazyCounter, 1991 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-02-09 03:02:19,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [477 Valid, 593 Invalid, 2065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1991 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-09 03:02:19,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3452 states. [2022-02-09 03:02:19,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3452 to 2361. [2022-02-09 03:02:19,978 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) [2022-02-09 03:02:19,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 10614 transitions. [2022-02-09 03:02:19,986 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 10614 transitions. Word has length 29 [2022-02-09 03:02:19,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:19,987 INFO L470 AbstractCegarLoop]: Abstraction has 2361 states and 10614 transitions. [2022-02-09 03:02:19,987 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) [2022-02-09 03:02:19,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 10614 transitions. [2022-02-09 03:02:19,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:19,992 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:19,992 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] [2022-02-09 03:02:20,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:20,204 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 [2022-02-09 03:02:20,204 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:20,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:20,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1417591807, now seen corresponding path program 5 times [2022-02-09 03:02:20,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:20,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976120641] [2022-02-09 03:02:20,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:20,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:20,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:20,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976120641] [2022-02-09 03:02:20,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976120641] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:20,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762432845] [2022-02-09 03:02:20,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:02:20,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:20,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:20,317 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) [2022-02-09 03:02:20,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-09 03:02:20,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:02:20,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:20,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2022-02-09 03:02:20,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:20,485 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 [2022-02-09 03:02:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:20,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:20,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:20,735 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-02-09 03:02:20,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:02:20,746 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 [2022-02-09 03:02:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:20,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762432845] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:20,782 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:20,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-02-09 03:02:20,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524648864] [2022-02-09 03:02:20,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:20,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:02:20,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:20,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:02:20,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:02:20,783 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) [2022-02-09 03:02:21,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:21,692 INFO L93 Difference]: Finished difference Result 3500 states and 14724 transitions. [2022-02-09 03:02:21,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-09 03:02:21,692 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 [2022-02-09 03:02:21,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:21,704 INFO L225 Difference]: With dead ends: 3500 [2022-02-09 03:02:21,704 INFO L226 Difference]: Without dead ends: 3446 [2022-02-09 03:02:21,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=1290, Unknown=0, NotChecked=0, Total=1482 [2022-02-09 03:02:21,705 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 [2022-02-09 03:02:21,705 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] [2022-02-09 03:02:21,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2022-02-09 03:02:21,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2300. [2022-02-09 03:02:21,798 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) [2022-02-09 03:02:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 10356 transitions. [2022-02-09 03:02:21,808 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 10356 transitions. Word has length 29 [2022-02-09 03:02:21,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:21,809 INFO L470 AbstractCegarLoop]: Abstraction has 2300 states and 10356 transitions. [2022-02-09 03:02:21,809 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) [2022-02-09 03:02:21,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 10356 transitions. [2022-02-09 03:02:21,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:21,814 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:21,814 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] [2022-02-09 03:02:21,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:22,039 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 [2022-02-09 03:02:22,039 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:22,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:22,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1130286919, now seen corresponding path program 6 times [2022-02-09 03:02:22,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:22,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447150442] [2022-02-09 03:02:22,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:22,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:22,178 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:22,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447150442] [2022-02-09 03:02:22,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447150442] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:22,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837993356] [2022-02-09 03:02:22,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:02:22,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:22,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:22,179 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) [2022-02-09 03:02:22,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-09 03:02:22,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-09 03:02:22,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:22,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:22,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:22,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:22,429 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 [2022-02-09 03:02:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:22,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:22,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:22,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837993356] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:22,875 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:22,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-09 03:02:22,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721833045] [2022-02-09 03:02:22,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:22,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:02:22,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:22,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:02:22,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:02:22,876 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) [2022-02-09 03:02:23,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:23,549 INFO L93 Difference]: Finished difference Result 2715 states and 11861 transitions. [2022-02-09 03:02:23,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-09 03:02:23,549 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 [2022-02-09 03:02:23,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:23,557 INFO L225 Difference]: With dead ends: 2715 [2022-02-09 03:02:23,557 INFO L226 Difference]: Without dead ends: 2696 [2022-02-09 03:02:23,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2022-02-09 03:02:23,557 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 365 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:02:23,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 320 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:02:23,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2022-02-09 03:02:23,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2350. [2022-02-09 03:02:23,595 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) [2022-02-09 03:02:23,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 10583 transitions. [2022-02-09 03:02:23,602 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 10583 transitions. Word has length 29 [2022-02-09 03:02:23,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:23,603 INFO L470 AbstractCegarLoop]: Abstraction has 2350 states and 10583 transitions. [2022-02-09 03:02:23,603 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) [2022-02-09 03:02:23,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 10583 transitions. [2022-02-09 03:02:23,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:23,608 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:23,608 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] [2022-02-09 03:02:23,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:23,824 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 [2022-02-09 03:02:23,824 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:23,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:23,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1861407771, now seen corresponding path program 7 times [2022-02-09 03:02:23,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:23,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082329978] [2022-02-09 03:02:23,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:23,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:23,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:23,960 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:23,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082329978] [2022-02-09 03:02:23,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082329978] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:23,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302655625] [2022-02-09 03:02:23,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:02:23,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:23,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:23,961 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) [2022-02-09 03:02:23,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-09 03:02:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:23,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:24,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:24,185 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 [2022-02-09 03:02:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:24,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:24,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:24,479 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 [2022-02-09 03:02:24,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:02:24,491 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 [2022-02-09 03:02:24,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:24,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302655625] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:24,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:24,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:02:24,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491463389] [2022-02-09 03:02:24,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:24,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:02:24,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:24,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:02:24,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:02:24,526 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) [2022-02-09 03:02:25,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:25,403 INFO L93 Difference]: Finished difference Result 3293 states and 14031 transitions. [2022-02-09 03:02:25,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-09 03:02:25,403 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 [2022-02-09 03:02:25,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:25,412 INFO L225 Difference]: With dead ends: 3293 [2022-02-09 03:02:25,412 INFO L226 Difference]: Without dead ends: 3265 [2022-02-09 03:02:25,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:02:25,420 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 400 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:02:25,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 418 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 03:02:25,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3265 states. [2022-02-09 03:02:25,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3265 to 2460. [2022-02-09 03:02:25,462 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) [2022-02-09 03:02:25,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 11099 transitions. [2022-02-09 03:02:25,469 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 11099 transitions. Word has length 29 [2022-02-09 03:02:25,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:25,469 INFO L470 AbstractCegarLoop]: Abstraction has 2460 states and 11099 transitions. [2022-02-09 03:02:25,469 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) [2022-02-09 03:02:25,469 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 11099 transitions. [2022-02-09 03:02:25,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:25,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:25,495 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] [2022-02-09 03:02:25,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:25,711 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 [2022-02-09 03:02:25,711 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:25,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:25,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1914794291, now seen corresponding path program 8 times [2022-02-09 03:02:25,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:25,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653486092] [2022-02-09 03:02:25,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:25,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:25,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:25,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653486092] [2022-02-09 03:02:25,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653486092] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:25,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180336404] [2022-02-09 03:02:25,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:02:25,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:25,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:25,783 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) [2022-02-09 03:02:25,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-09 03:02:25,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:02:25,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:25,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:25,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:25,975 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:25,975 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 [2022-02-09 03:02:26,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:26,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:26,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180336404] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:26,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:26,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-02-09 03:02:26,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408410167] [2022-02-09 03:02:26,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:26,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:02:26,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:26,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:02:26,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:02:26,246 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) [2022-02-09 03:02:26,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:26,610 INFO L93 Difference]: Finished difference Result 2720 states and 12010 transitions. [2022-02-09 03:02:26,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-09 03:02:26,611 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 [2022-02-09 03:02:26,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:26,618 INFO L225 Difference]: With dead ends: 2720 [2022-02-09 03:02:26,618 INFO L226 Difference]: Without dead ends: 2697 [2022-02-09 03:02:26,618 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 [2022-02-09 03:02:26,618 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 [2022-02-09 03:02:26,618 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] [2022-02-09 03:02:26,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2697 states. [2022-02-09 03:02:26,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2697 to 2404. [2022-02-09 03:02:26,655 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) [2022-02-09 03:02:26,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2404 states to 2404 states and 10853 transitions. [2022-02-09 03:02:26,663 INFO L78 Accepts]: Start accepts. Automaton has 2404 states and 10853 transitions. Word has length 29 [2022-02-09 03:02:26,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:26,663 INFO L470 AbstractCegarLoop]: Abstraction has 2404 states and 10853 transitions. [2022-02-09 03:02:26,663 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) [2022-02-09 03:02:26,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2404 states and 10853 transitions. [2022-02-09 03:02:26,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:26,668 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:26,668 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] [2022-02-09 03:02:26,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-02-09 03:02:26,883 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 [2022-02-09 03:02:26,883 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:26,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:26,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1843632387, now seen corresponding path program 9 times [2022-02-09 03:02:26,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:26,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223755764] [2022-02-09 03:02:26,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:26,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:26,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:26,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:26,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223755764] [2022-02-09 03:02:26,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223755764] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:26,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63201667] [2022-02-09 03:02:26,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:02:26,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:26,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:26,983 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) [2022-02-09 03:02:26,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-09 03:02:27,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-09 03:02:27,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:27,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:27,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:27,119 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:27,120 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 [2022-02-09 03:02:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:27,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:27,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63201667] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:27,415 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:27,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-09 03:02:27,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723052372] [2022-02-09 03:02:27,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:27,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:02:27,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:27,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:02:27,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:02:27,416 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) [2022-02-09 03:02:27,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:27,901 INFO L93 Difference]: Finished difference Result 2552 states and 11385 transitions. [2022-02-09 03:02:27,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-09 03:02:27,901 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 [2022-02-09 03:02:27,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:27,908 INFO L225 Difference]: With dead ends: 2552 [2022-02-09 03:02:27,908 INFO L226 Difference]: Without dead ends: 2533 [2022-02-09 03:02:27,908 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 [2022-02-09 03:02:27,908 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:02:27,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 347 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1239 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:02:27,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2022-02-09 03:02:27,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 2404. [2022-02-09 03:02:27,951 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) [2022-02-09 03:02:27,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2404 states to 2404 states and 10853 transitions. [2022-02-09 03:02:27,959 INFO L78 Accepts]: Start accepts. Automaton has 2404 states and 10853 transitions. Word has length 29 [2022-02-09 03:02:27,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:27,959 INFO L470 AbstractCegarLoop]: Abstraction has 2404 states and 10853 transitions. [2022-02-09 03:02:27,959 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) [2022-02-09 03:02:27,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2404 states and 10853 transitions. [2022-02-09 03:02:27,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:27,964 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:27,964 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] [2022-02-09 03:02:27,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:28,171 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 [2022-02-09 03:02:28,171 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:28,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:28,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1280034963, now seen corresponding path program 10 times [2022-02-09 03:02:28,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:28,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509439963] [2022-02-09 03:02:28,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:28,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:28,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:28,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509439963] [2022-02-09 03:02:28,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509439963] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:28,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073556537] [2022-02-09 03:02:28,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:02:28,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:28,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:28,282 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) [2022-02-09 03:02:28,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-09 03:02:28,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:02:28,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:28,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:28,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:28,401 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 [2022-02-09 03:02:28,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:28,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:28,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:28,586 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 [2022-02-09 03:02:28,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:02:28,593 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 [2022-02-09 03:02:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:28,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073556537] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:28,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:28,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-02-09 03:02:28,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861717713] [2022-02-09 03:02:28,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:28,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:02:28,619 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:28,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:02:28,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:02:28,619 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) [2022-02-09 03:02:29,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:29,337 INFO L93 Difference]: Finished difference Result 3157 states and 13499 transitions. [2022-02-09 03:02:29,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-09 03:02:29,338 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 [2022-02-09 03:02:29,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:29,346 INFO L225 Difference]: With dead ends: 3157 [2022-02-09 03:02:29,346 INFO L226 Difference]: Without dead ends: 3115 [2022-02-09 03:02:29,346 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 [2022-02-09 03:02:29,347 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 487 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-02-09 03:02:29,347 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] [2022-02-09 03:02:29,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2022-02-09 03:02:29,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 2389. [2022-02-09 03:02:29,385 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) [2022-02-09 03:02:29,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 10785 transitions. [2022-02-09 03:02:29,392 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 10785 transitions. Word has length 29 [2022-02-09 03:02:29,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:29,392 INFO L470 AbstractCegarLoop]: Abstraction has 2389 states and 10785 transitions. [2022-02-09 03:02:29,393 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) [2022-02-09 03:02:29,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 10785 transitions. [2022-02-09 03:02:29,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:29,397 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:29,397 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] [2022-02-09 03:02:29,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:29,607 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 [2022-02-09 03:02:29,607 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:29,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:29,608 INFO L85 PathProgramCache]: Analyzing trace with hash -109274557, now seen corresponding path program 11 times [2022-02-09 03:02:29,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:29,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275900671] [2022-02-09 03:02:29,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:29,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:29,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:29,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275900671] [2022-02-09 03:02:29,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275900671] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:29,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803018247] [2022-02-09 03:02:29,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:02:29,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:29,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:29,713 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) [2022-02-09 03:02:29,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-09 03:02:29,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-09 03:02:29,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:29,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:29,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:29,881 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 [2022-02-09 03:02:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:29,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:30,046 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:30,047 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 [2022-02-09 03:02:30,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:02:30,053 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 [2022-02-09 03:02:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:30,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803018247] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:30,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:30,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-02-09 03:02:30,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559299019] [2022-02-09 03:02:30,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:30,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:02:30,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:30,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:02:30,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:02:30,074 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) [2022-02-09 03:02:30,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:30,910 INFO L93 Difference]: Finished difference Result 3246 states and 13969 transitions. [2022-02-09 03:02:30,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-09 03:02:30,910 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 [2022-02-09 03:02:30,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:30,918 INFO L225 Difference]: With dead ends: 3246 [2022-02-09 03:02:30,919 INFO L226 Difference]: Without dead ends: 3208 [2022-02-09 03:02:30,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=1148, Unknown=0, NotChecked=0, Total=1406 [2022-02-09 03:02:30,919 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 404 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:02:30,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 428 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1461 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 03:02:30,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3208 states. [2022-02-09 03:02:30,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3208 to 2531. [2022-02-09 03:02:30,961 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) [2022-02-09 03:02:30,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 11435 transitions. [2022-02-09 03:02:30,969 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 11435 transitions. Word has length 29 [2022-02-09 03:02:30,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:30,969 INFO L470 AbstractCegarLoop]: Abstraction has 2531 states and 11435 transitions. [2022-02-09 03:02:30,969 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) [2022-02-09 03:02:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 11435 transitions. [2022-02-09 03:02:30,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:30,974 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:30,974 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] [2022-02-09 03:02:30,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:31,191 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 [2022-02-09 03:02:31,191 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:31,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:31,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1193998049, now seen corresponding path program 12 times [2022-02-09 03:02:31,191 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:31,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580025115] [2022-02-09 03:02:31,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:31,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:31,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:31,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:31,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580025115] [2022-02-09 03:02:31,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580025115] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:31,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592846685] [2022-02-09 03:02:31,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:02:31,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:31,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:31,281 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) [2022-02-09 03:02:31,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-09 03:02:31,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-09 03:02:31,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:31,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-09 03:02:31,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:31,369 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:31,370 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 [2022-02-09 03:02:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:31,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:31,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592846685] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:31,586 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:31,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 18 [2022-02-09 03:02:31,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109581024] [2022-02-09 03:02:31,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:31,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-09 03:02:31,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:31,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-09 03:02:31,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-02-09 03:02:31,586 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) [2022-02-09 03:02:31,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:31,835 INFO L93 Difference]: Finished difference Result 2757 states and 12227 transitions. [2022-02-09 03:02:31,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-09 03:02:31,835 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 [2022-02-09 03:02:31,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:31,843 INFO L225 Difference]: With dead ends: 2757 [2022-02-09 03:02:31,843 INFO L226 Difference]: Without dead ends: 2744 [2022-02-09 03:02:31,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-02-09 03:02:31,844 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-09 03:02:31,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 244 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-09 03:02:31,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2022-02-09 03:02:31,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2531. [2022-02-09 03:02:31,888 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) [2022-02-09 03:02:31,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 11432 transitions. [2022-02-09 03:02:31,896 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 11432 transitions. Word has length 29 [2022-02-09 03:02:31,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:31,896 INFO L470 AbstractCegarLoop]: Abstraction has 2531 states and 11432 transitions. [2022-02-09 03:02:31,896 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) [2022-02-09 03:02:31,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 11432 transitions. [2022-02-09 03:02:31,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:31,901 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:31,901 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] [2022-02-09 03:02:31,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:32,116 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 [2022-02-09 03:02:32,116 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:32,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:32,117 INFO L85 PathProgramCache]: Analyzing trace with hash 294635977, now seen corresponding path program 13 times [2022-02-09 03:02:32,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:32,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663657563] [2022-02-09 03:02:32,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:32,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:32,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:32,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663657563] [2022-02-09 03:02:32,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663657563] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:32,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570188243] [2022-02-09 03:02:32,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:02:32,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:32,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:32,205 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) [2022-02-09 03:02:32,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-09 03:02:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:32,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:32,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:32,319 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 [2022-02-09 03:02:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:32,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:32,498 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:32,498 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 [2022-02-09 03:02:32,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:02:32,504 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-02-09 03:02:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:32,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570188243] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:32,525 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:32,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-02-09 03:02:32,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216440097] [2022-02-09 03:02:32,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:32,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:02:32,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:32,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:02:32,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:02:32,526 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) [2022-02-09 03:02:33,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:33,329 INFO L93 Difference]: Finished difference Result 3306 states and 14104 transitions. [2022-02-09 03:02:33,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-09 03:02:33,330 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 [2022-02-09 03:02:33,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:33,340 INFO L225 Difference]: With dead ends: 3306 [2022-02-09 03:02:33,340 INFO L226 Difference]: Without dead ends: 3263 [2022-02-09 03:02:33,340 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 [2022-02-09 03:02:33,341 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 508 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:02:33,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 458 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:02:33,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3263 states. [2022-02-09 03:02:33,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3263 to 2477. [2022-02-09 03:02:33,392 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) [2022-02-09 03:02:33,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 11192 transitions. [2022-02-09 03:02:33,403 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 11192 transitions. Word has length 29 [2022-02-09 03:02:33,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:33,403 INFO L470 AbstractCegarLoop]: Abstraction has 2477 states and 11192 transitions. [2022-02-09 03:02:33,403 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) [2022-02-09 03:02:33,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 11192 transitions. [2022-02-09 03:02:33,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:33,409 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:33,409 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] [2022-02-09 03:02:33,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-02-09 03:02:33,623 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 [2022-02-09 03:02:33,623 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:33,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:33,624 INFO L85 PathProgramCache]: Analyzing trace with hash -565478263, now seen corresponding path program 14 times [2022-02-09 03:02:33,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:33,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418460060] [2022-02-09 03:02:33,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:33,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:33,764 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:33,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418460060] [2022-02-09 03:02:33,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418460060] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:33,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080282177] [2022-02-09 03:02:33,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:02:33,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:33,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:33,784 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) [2022-02-09 03:02:33,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-09 03:02:33,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:02:33,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:33,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:33,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:33,979 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 [2022-02-09 03:02:34,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:34,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:34,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:34,195 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 [2022-02-09 03:02:34,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:02:34,203 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 [2022-02-09 03:02:34,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:34,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080282177] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:34,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:34,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-09 03:02:34,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054595348] [2022-02-09 03:02:34,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:34,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-09 03:02:34,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:34,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-09 03:02:34,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-02-09 03:02:34,234 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) [2022-02-09 03:02:35,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:35,329 INFO L93 Difference]: Finished difference Result 3069 states and 13302 transitions. [2022-02-09 03:02:35,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-09 03:02:35,330 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 [2022-02-09 03:02:35,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:35,338 INFO L225 Difference]: With dead ends: 3069 [2022-02-09 03:02:35,338 INFO L226 Difference]: Without dead ends: 3039 [2022-02-09 03:02:35,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2022-02-09 03:02:35,338 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 [2022-02-09 03:02:35,338 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] [2022-02-09 03:02:35,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3039 states. [2022-02-09 03:02:35,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3039 to 2486. [2022-02-09 03:02:35,372 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) [2022-02-09 03:02:35,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 11216 transitions. [2022-02-09 03:02:35,379 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 11216 transitions. Word has length 29 [2022-02-09 03:02:35,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:35,379 INFO L470 AbstractCegarLoop]: Abstraction has 2486 states and 11216 transitions. [2022-02-09 03:02:35,379 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) [2022-02-09 03:02:35,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 11216 transitions. [2022-02-09 03:02:35,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:35,384 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:35,384 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] [2022-02-09 03:02:35,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:35,592 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 [2022-02-09 03:02:35,593 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:35,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:35,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1979344029, now seen corresponding path program 6 times [2022-02-09 03:02:35,593 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:35,593 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572561825] [2022-02-09 03:02:35,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:35,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:35,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:35,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:35,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572561825] [2022-02-09 03:02:35,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572561825] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:35,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426077779] [2022-02-09 03:02:35,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:02:35,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:35,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:35,730 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) [2022-02-09 03:02:35,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-09 03:02:35,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-09 03:02:35,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:35,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-09 03:02:35,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:35,849 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:35,849 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 [2022-02-09 03:02:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:36,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:36,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426077779] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:36,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:36,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-09 03:02:36,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202768233] [2022-02-09 03:02:36,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:36,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-09 03:02:36,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:36,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-09 03:02:36,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-02-09 03:02:36,284 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) [2022-02-09 03:02:36,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:36,688 INFO L93 Difference]: Finished difference Result 2894 states and 12763 transitions. [2022-02-09 03:02:36,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-09 03:02:36,689 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 [2022-02-09 03:02:36,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:36,698 INFO L225 Difference]: With dead ends: 2894 [2022-02-09 03:02:36,698 INFO L226 Difference]: Without dead ends: 2875 [2022-02-09 03:02:36,698 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 [2022-02-09 03:02:36,698 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 225 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-02-09 03:02:36,698 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] [2022-02-09 03:02:36,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2022-02-09 03:02:36,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2540. [2022-02-09 03:02:36,739 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) [2022-02-09 03:02:36,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 11447 transitions. [2022-02-09 03:02:36,748 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 11447 transitions. Word has length 29 [2022-02-09 03:02:36,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:36,748 INFO L470 AbstractCegarLoop]: Abstraction has 2540 states and 11447 transitions. [2022-02-09 03:02:36,748 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) [2022-02-09 03:02:36,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 11447 transitions. [2022-02-09 03:02:36,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:36,754 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:36,754 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] [2022-02-09 03:02:36,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-02-09 03:02:36,971 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 [2022-02-09 03:02:36,971 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:36,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:36,971 INFO L85 PathProgramCache]: Analyzing trace with hash -556989203, now seen corresponding path program 7 times [2022-02-09 03:02:36,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:36,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543359376] [2022-02-09 03:02:36,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:36,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:36,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:37,065 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:37,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543359376] [2022-02-09 03:02:37,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543359376] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:37,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427439716] [2022-02-09 03:02:37,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:02:37,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:37,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:37,066 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) [2022-02-09 03:02:37,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-09 03:02:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:37,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:37,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:37,247 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 [2022-02-09 03:02:37,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:37,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:37,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:37,504 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 [2022-02-09 03:02:37,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:02:37,514 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-02-09 03:02:37,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:37,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427439716] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:37,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:37,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:02:37,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631430904] [2022-02-09 03:02:37,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:37,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:02:37,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:37,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:02:37,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:02:37,545 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) [2022-02-09 03:02:38,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:38,236 INFO L93 Difference]: Finished difference Result 3497 states and 14957 transitions. [2022-02-09 03:02:38,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-09 03:02:38,237 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 [2022-02-09 03:02:38,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:38,246 INFO L225 Difference]: With dead ends: 3497 [2022-02-09 03:02:38,247 INFO L226 Difference]: Without dead ends: 3469 [2022-02-09 03:02:38,247 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 [2022-02-09 03:02:38,247 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:02:38,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 382 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:02:38,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2022-02-09 03:02:38,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 2669. [2022-02-09 03:02:38,294 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) [2022-02-09 03:02:38,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2669 states to 2669 states and 12029 transitions. [2022-02-09 03:02:38,303 INFO L78 Accepts]: Start accepts. Automaton has 2669 states and 12029 transitions. Word has length 29 [2022-02-09 03:02:38,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:38,303 INFO L470 AbstractCegarLoop]: Abstraction has 2669 states and 12029 transitions. [2022-02-09 03:02:38,303 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) [2022-02-09 03:02:38,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2669 states and 12029 transitions. [2022-02-09 03:02:38,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:38,308 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:38,309 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] [2022-02-09 03:02:38,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-02-09 03:02:38,525 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 [2022-02-09 03:02:38,525 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:38,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:38,526 INFO L85 PathProgramCache]: Analyzing trace with hash -156115671, now seen corresponding path program 8 times [2022-02-09 03:02:38,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:38,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348777208] [2022-02-09 03:02:38,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:38,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:38,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:38,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348777208] [2022-02-09 03:02:38,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348777208] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:38,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830620315] [2022-02-09 03:02:38,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:02:38,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:38,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:38,660 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) [2022-02-09 03:02:38,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-09 03:02:38,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:02:38,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:38,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:38,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:38,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:38,806 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 [2022-02-09 03:02:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:38,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:39,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830620315] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:39,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:39,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-02-09 03:02:39,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812884993] [2022-02-09 03:02:39,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:39,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:02:39,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:39,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:02:39,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:02:39,098 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) [2022-02-09 03:02:39,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:39,481 INFO L93 Difference]: Finished difference Result 2976 states and 13095 transitions. [2022-02-09 03:02:39,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-09 03:02:39,481 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 [2022-02-09 03:02:39,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:39,489 INFO L225 Difference]: With dead ends: 2976 [2022-02-09 03:02:39,489 INFO L226 Difference]: Without dead ends: 2953 [2022-02-09 03:02:39,490 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 [2022-02-09 03:02:39,490 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 281 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-09 03:02:39,490 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] [2022-02-09 03:02:39,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2022-02-09 03:02:39,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 2597. [2022-02-09 03:02:39,530 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) [2022-02-09 03:02:39,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 11708 transitions. [2022-02-09 03:02:39,538 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 11708 transitions. Word has length 29 [2022-02-09 03:02:39,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:39,538 INFO L470 AbstractCegarLoop]: Abstraction has 2597 states and 11708 transitions. [2022-02-09 03:02:39,538 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) [2022-02-09 03:02:39,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 11708 transitions. [2022-02-09 03:02:39,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:39,543 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:39,543 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] [2022-02-09 03:02:39,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-02-09 03:02:39,759 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 [2022-02-09 03:02:39,759 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:39,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:39,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1075204841, now seen corresponding path program 9 times [2022-02-09 03:02:39,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:39,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725154405] [2022-02-09 03:02:39,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:39,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:39,842 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:39,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725154405] [2022-02-09 03:02:39,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725154405] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:39,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765468676] [2022-02-09 03:02:39,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:02:39,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:39,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:39,844 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) [2022-02-09 03:02:39,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-02-09 03:02:39,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-09 03:02:39,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:39,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-09 03:02:39,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:39,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:39,938 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 [2022-02-09 03:02:40,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:40,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:40,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765468676] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:40,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:40,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-09 03:02:40,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665869889] [2022-02-09 03:02:40,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:40,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-09 03:02:40,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:40,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-09 03:02:40,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-02-09 03:02:40,156 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) [2022-02-09 03:02:40,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:40,437 INFO L93 Difference]: Finished difference Result 2734 states and 12196 transitions. [2022-02-09 03:02:40,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-09 03:02:40,437 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 [2022-02-09 03:02:40,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:40,444 INFO L225 Difference]: With dead ends: 2734 [2022-02-09 03:02:40,445 INFO L226 Difference]: Without dead ends: 2719 [2022-02-09 03:02:40,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-02-09 03:02:40,445 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 73 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-09 03:02:40,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 288 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-09 03:02:40,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2022-02-09 03:02:40,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 2597. [2022-02-09 03:02:40,482 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) [2022-02-09 03:02:40,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 11708 transitions. [2022-02-09 03:02:40,490 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 11708 transitions. Word has length 29 [2022-02-09 03:02:40,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:40,490 INFO L470 AbstractCegarLoop]: Abstraction has 2597 states and 11708 transitions. [2022-02-09 03:02:40,490 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) [2022-02-09 03:02:40,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 11708 transitions. [2022-02-09 03:02:40,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:40,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:40,496 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] [2022-02-09 03:02:40,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:40,712 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 [2022-02-09 03:02:40,712 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:40,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:40,712 INFO L85 PathProgramCache]: Analyzing trace with hash -558108055, now seen corresponding path program 10 times [2022-02-09 03:02:40,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:40,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907830925] [2022-02-09 03:02:40,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:40,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:40,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:40,787 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:40,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907830925] [2022-02-09 03:02:40,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907830925] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:40,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946477839] [2022-02-09 03:02:40,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:02:40,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:40,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:40,789 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) [2022-02-09 03:02:40,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-02-09 03:02:40,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:02:40,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:40,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:40,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:40,926 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 [2022-02-09 03:02:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:41,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:41,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:41,124 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 [2022-02-09 03:02:41,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:02:41,131 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 [2022-02-09 03:02:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:41,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946477839] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:41,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:41,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:02:41,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047842271] [2022-02-09 03:02:41,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:41,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:02:41,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:41,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:02:41,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:02:41,157 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) [2022-02-09 03:02:41,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:41,770 INFO L93 Difference]: Finished difference Result 3239 states and 14015 transitions. [2022-02-09 03:02:41,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-09 03:02:41,770 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 [2022-02-09 03:02:41,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:41,779 INFO L225 Difference]: With dead ends: 3239 [2022-02-09 03:02:41,779 INFO L226 Difference]: Without dead ends: 3215 [2022-02-09 03:02:41,780 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 [2022-02-09 03:02:41,780 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 [2022-02-09 03:02:41,780 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] [2022-02-09 03:02:41,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2022-02-09 03:02:41,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 2590. [2022-02-09 03:02:41,820 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) [2022-02-09 03:02:41,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2590 states to 2590 states and 11681 transitions. [2022-02-09 03:02:41,828 INFO L78 Accepts]: Start accepts. Automaton has 2590 states and 11681 transitions. Word has length 29 [2022-02-09 03:02:41,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:41,828 INFO L470 AbstractCegarLoop]: Abstraction has 2590 states and 11681 transitions. [2022-02-09 03:02:41,828 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) [2022-02-09 03:02:41,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2590 states and 11681 transitions. [2022-02-09 03:02:41,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:41,833 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:41,833 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] [2022-02-09 03:02:41,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:42,049 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 [2022-02-09 03:02:42,050 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:42,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:42,050 INFO L85 PathProgramCache]: Analyzing trace with hash -731434137, now seen corresponding path program 11 times [2022-02-09 03:02:42,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:42,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484015156] [2022-02-09 03:02:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:42,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:42,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:42,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484015156] [2022-02-09 03:02:42,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484015156] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:42,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630230485] [2022-02-09 03:02:42,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:02:42,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:42,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:42,168 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) [2022-02-09 03:02:42,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-02-09 03:02:42,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-09 03:02:42,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:42,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:42,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:42,319 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 [2022-02-09 03:02:42,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:42,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:42,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:42,559 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 [2022-02-09 03:02:42,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:02:42,568 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 [2022-02-09 03:02:42,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:42,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630230485] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:42,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:42,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-02-09 03:02:42,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887409626] [2022-02-09 03:02:42,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:42,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:02:42,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:42,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:02:42,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:02:42,598 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) [2022-02-09 03:02:43,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:43,533 INFO L93 Difference]: Finished difference Result 3767 states and 15975 transitions. [2022-02-09 03:02:43,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-09 03:02:43,533 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 [2022-02-09 03:02:43,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:43,545 INFO L225 Difference]: With dead ends: 3767 [2022-02-09 03:02:43,545 INFO L226 Difference]: Without dead ends: 3729 [2022-02-09 03:02:43,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=258, Invalid=1148, Unknown=0, NotChecked=0, Total=1406 [2022-02-09 03:02:43,546 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 509 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:02:43,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 428 Invalid, 1533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 03:02:43,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2022-02-09 03:02:43,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 2764. [2022-02-09 03:02:43,635 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) [2022-02-09 03:02:43,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 12461 transitions. [2022-02-09 03:02:43,643 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 12461 transitions. Word has length 29 [2022-02-09 03:02:43,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:43,643 INFO L470 AbstractCegarLoop]: Abstraction has 2764 states and 12461 transitions. [2022-02-09 03:02:43,643 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) [2022-02-09 03:02:43,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 12461 transitions. [2022-02-09 03:02:43,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:43,648 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:43,648 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] [2022-02-09 03:02:43,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:43,860 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 [2022-02-09 03:02:43,860 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:43,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:43,861 INFO L85 PathProgramCache]: Analyzing trace with hash 690920689, now seen corresponding path program 12 times [2022-02-09 03:02:43,861 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:43,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026194415] [2022-02-09 03:02:43,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:43,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:43,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:43,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:43,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026194415] [2022-02-09 03:02:43,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026194415] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:43,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522578588] [2022-02-09 03:02:43,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:02:43,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:43,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:43,962 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) [2022-02-09 03:02:43,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-02-09 03:02:44,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-09 03:02:44,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:44,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-09 03:02:44,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:44,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:44,097 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 [2022-02-09 03:02:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:44,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:44,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522578588] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:44,399 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:44,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 18 [2022-02-09 03:02:44,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989758863] [2022-02-09 03:02:44,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:44,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-09 03:02:44,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:44,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-09 03:02:44,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-02-09 03:02:44,400 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) [2022-02-09 03:02:44,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:44,701 INFO L93 Difference]: Finished difference Result 3113 states and 13640 transitions. [2022-02-09 03:02:44,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-09 03:02:44,701 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 [2022-02-09 03:02:44,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:44,712 INFO L225 Difference]: With dead ends: 3113 [2022-02-09 03:02:44,712 INFO L226 Difference]: Without dead ends: 3100 [2022-02-09 03:02:44,712 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 [2022-02-09 03:02:44,712 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 194 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-09 03:02:44,713 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] [2022-02-09 03:02:44,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2022-02-09 03:02:44,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 2764. [2022-02-09 03:02:44,766 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) [2022-02-09 03:02:44,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 12458 transitions. [2022-02-09 03:02:44,777 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 12458 transitions. Word has length 29 [2022-02-09 03:02:44,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:44,777 INFO L470 AbstractCegarLoop]: Abstraction has 2764 states and 12458 transitions. [2022-02-09 03:02:44,777 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) [2022-02-09 03:02:44,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 12458 transitions. [2022-02-09 03:02:44,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:44,784 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:44,784 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] [2022-02-09 03:02:44,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:44,999 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 [2022-02-09 03:02:44,999 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:44,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:45,000 INFO L85 PathProgramCache]: Analyzing trace with hash 245818669, now seen corresponding path program 13 times [2022-02-09 03:02:45,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:45,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801235703] [2022-02-09 03:02:45,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:45,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:45,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:45,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801235703] [2022-02-09 03:02:45,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801235703] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:45,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609762709] [2022-02-09 03:02:45,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:02:45,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:45,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:45,096 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) [2022-02-09 03:02:45,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-02-09 03:02:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:45,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:45,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:45,244 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 [2022-02-09 03:02:45,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:45,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:45,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:45,521 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 17 treesize of output 22 [2022-02-09 03:02:45,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:02:45,532 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 [2022-02-09 03:02:45,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:45,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609762709] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:45,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:45,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-02-09 03:02:45,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448825229] [2022-02-09 03:02:45,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:45,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:02:45,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:45,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:02:45,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:02:45,567 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) [2022-02-09 03:02:46,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:46,471 INFO L93 Difference]: Finished difference Result 3696 states and 15794 transitions. [2022-02-09 03:02:46,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-09 03:02:46,471 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 [2022-02-09 03:02:46,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:46,480 INFO L225 Difference]: With dead ends: 3696 [2022-02-09 03:02:46,481 INFO L226 Difference]: Without dead ends: 3650 [2022-02-09 03:02:46,481 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 [2022-02-09 03:02:46,481 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 [2022-02-09 03:02:46,481 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] [2022-02-09 03:02:46,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3650 states. [2022-02-09 03:02:46,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3650 to 2657. [2022-02-09 03:02:46,558 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) [2022-02-09 03:02:46,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 11982 transitions. [2022-02-09 03:02:46,566 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 11982 transitions. Word has length 29 [2022-02-09 03:02:46,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:46,567 INFO L470 AbstractCegarLoop]: Abstraction has 2657 states and 11982 transitions. [2022-02-09 03:02:46,567 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) [2022-02-09 03:02:46,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 11982 transitions. [2022-02-09 03:02:46,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:46,571 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:46,571 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] [2022-02-09 03:02:46,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:46,772 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 [2022-02-09 03:02:46,772 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:46,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:46,772 INFO L85 PathProgramCache]: Analyzing trace with hash -892761565, now seen corresponding path program 14 times [2022-02-09 03:02:46,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:46,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319116240] [2022-02-09 03:02:46,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:46,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:46,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:46,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:46,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319116240] [2022-02-09 03:02:46,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319116240] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:46,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426822319] [2022-02-09 03:02:46,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:02:46,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:46,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:46,897 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) [2022-02-09 03:02:46,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-02-09 03:02:46,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:02:46,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:46,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:46,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:47,067 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:47,067 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 [2022-02-09 03:02:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:47,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:47,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426822319] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:47,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:47,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-09 03:02:47,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741033757] [2022-02-09 03:02:47,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:47,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:02:47,495 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:47,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:02:47,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:02:47,495 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) [2022-02-09 03:02:47,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:47,919 INFO L93 Difference]: Finished difference Result 2811 states and 12524 transitions. [2022-02-09 03:02:47,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-09 03:02:47,919 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 [2022-02-09 03:02:47,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:47,927 INFO L225 Difference]: With dead ends: 2811 [2022-02-09 03:02:47,927 INFO L226 Difference]: Without dead ends: 2792 [2022-02-09 03:02:47,927 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 [2022-02-09 03:02:47,927 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 137 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-02-09 03:02:47,927 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] [2022-02-09 03:02:47,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2022-02-09 03:02:47,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2636. [2022-02-09 03:02:47,965 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) [2022-02-09 03:02:47,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 11901 transitions. [2022-02-09 03:02:47,972 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 11901 transitions. Word has length 29 [2022-02-09 03:02:47,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:47,973 INFO L470 AbstractCegarLoop]: Abstraction has 2636 states and 11901 transitions. [2022-02-09 03:02:47,973 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) [2022-02-09 03:02:47,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 11901 transitions. [2022-02-09 03:02:47,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:47,977 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:47,977 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] [2022-02-09 03:02:47,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:48,193 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 [2022-02-09 03:02:48,193 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:48,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:48,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1546865603, now seen corresponding path program 15 times [2022-02-09 03:02:48,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:48,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758874583] [2022-02-09 03:02:48,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:48,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:48,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:48,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758874583] [2022-02-09 03:02:48,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758874583] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:48,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629246367] [2022-02-09 03:02:48,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:02:48,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:48,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:48,274 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) [2022-02-09 03:02:48,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-02-09 03:02:48,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-09 03:02:48,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:48,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-09 03:02:48,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:48,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:48,383 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 [2022-02-09 03:02:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:48,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:48,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629246367] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:48,660 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:48,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-02-09 03:02:48,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139340124] [2022-02-09 03:02:48,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:48,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-09 03:02:48,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:48,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-09 03:02:48,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-02-09 03:02:48,661 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) [2022-02-09 03:02:49,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:49,151 INFO L93 Difference]: Finished difference Result 3041 states and 13364 transitions. [2022-02-09 03:02:49,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-09 03:02:49,152 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 [2022-02-09 03:02:49,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:49,161 INFO L225 Difference]: With dead ends: 3041 [2022-02-09 03:02:49,161 INFO L226 Difference]: Without dead ends: 3022 [2022-02-09 03:02:49,161 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 [2022-02-09 03:02:49,162 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 [2022-02-09 03:02:49,162 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] [2022-02-09 03:02:49,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2022-02-09 03:02:49,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2689. [2022-02-09 03:02:49,237 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) [2022-02-09 03:02:49,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2689 states to 2689 states and 12138 transitions. [2022-02-09 03:02:49,246 INFO L78 Accepts]: Start accepts. Automaton has 2689 states and 12138 transitions. Word has length 29 [2022-02-09 03:02:49,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:49,246 INFO L470 AbstractCegarLoop]: Abstraction has 2689 states and 12138 transitions. [2022-02-09 03:02:49,246 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) [2022-02-09 03:02:49,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2689 states and 12138 transitions. [2022-02-09 03:02:49,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:49,251 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:49,251 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] [2022-02-09 03:02:49,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:49,467 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 [2022-02-09 03:02:49,468 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:49,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:49,468 INFO L85 PathProgramCache]: Analyzing trace with hash -243592997, now seen corresponding path program 16 times [2022-02-09 03:02:49,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:49,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143605041] [2022-02-09 03:02:49,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:49,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:49,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:49,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:49,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143605041] [2022-02-09 03:02:49,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143605041] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:49,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147628181] [2022-02-09 03:02:49,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:02:49,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:49,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:49,564 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) [2022-02-09 03:02:49,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-02-09 03:02:49,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:02:49,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:49,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:49,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:49,738 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 [2022-02-09 03:02:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:49,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:49,985 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:49,985 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 [2022-02-09 03:02:49,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:02:49,995 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 [2022-02-09 03:02:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:50,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147628181] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:50,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:50,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:02:50,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405281506] [2022-02-09 03:02:50,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:50,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:02:50,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:50,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:02:50,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:02:50,066 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) [2022-02-09 03:02:50,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:50,786 INFO L93 Difference]: Finished difference Result 3583 states and 15392 transitions. [2022-02-09 03:02:50,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-09 03:02:50,786 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 [2022-02-09 03:02:50,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:50,797 INFO L225 Difference]: With dead ends: 3583 [2022-02-09 03:02:50,798 INFO L226 Difference]: Without dead ends: 3555 [2022-02-09 03:02:50,798 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 [2022-02-09 03:02:50,798 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:02:50,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 424 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:02:50,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3555 states. [2022-02-09 03:02:50,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3555 to 2783. [2022-02-09 03:02:50,862 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) [2022-02-09 03:02:50,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 12586 transitions. [2022-02-09 03:02:50,871 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 12586 transitions. Word has length 29 [2022-02-09 03:02:50,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:50,871 INFO L470 AbstractCegarLoop]: Abstraction has 2783 states and 12586 transitions. [2022-02-09 03:02:50,871 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) [2022-02-09 03:02:50,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 12586 transitions. [2022-02-09 03:02:50,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:50,876 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:50,876 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] [2022-02-09 03:02:50,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:51,095 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 [2022-02-09 03:02:51,095 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:51,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:51,095 INFO L85 PathProgramCache]: Analyzing trace with hash -296979517, now seen corresponding path program 17 times [2022-02-09 03:02:51,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:51,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029683474] [2022-02-09 03:02:51,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:51,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:51,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:51,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:51,193 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:51,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029683474] [2022-02-09 03:02:51,193 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029683474] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:51,193 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008800552] [2022-02-09 03:02:51,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:02:51,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:51,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:51,196 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) [2022-02-09 03:02:51,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-02-09 03:02:51,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-09 03:02:51,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:51,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:51,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:51,354 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 [2022-02-09 03:02:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:51,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:51,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:51,608 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 [2022-02-09 03:02:51,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:02:51,618 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 [2022-02-09 03:02:51,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:51,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008800552] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:51,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:51,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:02:51,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470022708] [2022-02-09 03:02:51,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:51,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:02:51,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:51,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:02:51,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:02:51,682 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) [2022-02-09 03:02:52,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:52,541 INFO L93 Difference]: Finished difference Result 3573 states and 15377 transitions. [2022-02-09 03:02:52,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-09 03:02:52,541 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 [2022-02-09 03:02:52,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:52,550 INFO L225 Difference]: With dead ends: 3573 [2022-02-09 03:02:52,551 INFO L226 Difference]: Without dead ends: 3528 [2022-02-09 03:02:52,551 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 [2022-02-09 03:02:52,551 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 422 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:02:52,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 425 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1392 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 03:02:52,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2022-02-09 03:02:52,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 2746. [2022-02-09 03:02:52,591 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) [2022-02-09 03:02:52,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2746 states to 2746 states and 12418 transitions. [2022-02-09 03:02:52,599 INFO L78 Accepts]: Start accepts. Automaton has 2746 states and 12418 transitions. Word has length 29 [2022-02-09 03:02:52,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:52,599 INFO L470 AbstractCegarLoop]: Abstraction has 2746 states and 12418 transitions. [2022-02-09 03:02:52,599 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) [2022-02-09 03:02:52,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2746 states and 12418 transitions. [2022-02-09 03:02:52,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:52,604 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:52,604 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] [2022-02-09 03:02:52,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-02-09 03:02:52,819 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 [2022-02-09 03:02:52,820 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:52,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:52,820 INFO L85 PathProgramCache]: Analyzing trace with hash -833520135, now seen corresponding path program 18 times [2022-02-09 03:02:52,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:52,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929767538] [2022-02-09 03:02:52,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:52,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:52,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:52,936 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:52,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929767538] [2022-02-09 03:02:52,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929767538] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:52,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907762416] [2022-02-09 03:02:52,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:02:52,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:52,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:52,937 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) [2022-02-09 03:02:52,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-02-09 03:02:52,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-09 03:02:52,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:52,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-09 03:02:52,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:53,120 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 [2022-02-09 03:02:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:53,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:53,403 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:53,403 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 [2022-02-09 03:02:53,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:02:53,414 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 [2022-02-09 03:02:53,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:53,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907762416] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:53,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:53,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-09 03:02:53,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214496543] [2022-02-09 03:02:53,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:53,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-09 03:02:53,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:53,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-09 03:02:53,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-02-09 03:02:53,495 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) [2022-02-09 03:02:54,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:54,523 INFO L93 Difference]: Finished difference Result 3370 states and 14667 transitions. [2022-02-09 03:02:54,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-09 03:02:54,523 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 [2022-02-09 03:02:54,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:54,534 INFO L225 Difference]: With dead ends: 3370 [2022-02-09 03:02:54,534 INFO L226 Difference]: Without dead ends: 3332 [2022-02-09 03:02:54,534 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 [2022-02-09 03:02:54,535 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 [2022-02-09 03:02:54,535 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] [2022-02-09 03:02:54,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3332 states. [2022-02-09 03:02:54,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3332 to 2725. [2022-02-09 03:02:54,577 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) [2022-02-09 03:02:54,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 12330 transitions. [2022-02-09 03:02:54,585 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 12330 transitions. Word has length 29 [2022-02-09 03:02:54,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:54,585 INFO L470 AbstractCegarLoop]: Abstraction has 2725 states and 12330 transitions. [2022-02-09 03:02:54,585 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) [2022-02-09 03:02:54,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 12330 transitions. [2022-02-09 03:02:54,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:54,589 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:54,589 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] [2022-02-09 03:02:54,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-02-09 03:02:54,792 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 [2022-02-09 03:02:54,792 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:54,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:54,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1508540217, now seen corresponding path program 19 times [2022-02-09 03:02:54,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:54,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689573164] [2022-02-09 03:02:54,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:54,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:54,877 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:54,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689573164] [2022-02-09 03:02:54,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689573164] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:54,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520525276] [2022-02-09 03:02:54,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:02:54,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:54,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:54,879 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) [2022-02-09 03:02:54,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-02-09 03:02:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:54,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:54,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:55,046 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 15 treesize of output 7 [2022-02-09 03:02:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:55,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:55,303 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:55,303 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 [2022-02-09 03:02:55,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:02:55,315 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 [2022-02-09 03:02:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:55,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520525276] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:55,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:55,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-02-09 03:02:55,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850160035] [2022-02-09 03:02:55,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:55,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:02:55,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:55,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:02:55,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:02:55,377 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) [2022-02-09 03:02:56,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:56,270 INFO L93 Difference]: Finished difference Result 3641 states and 15769 transitions. [2022-02-09 03:02:56,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-09 03:02:56,270 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 [2022-02-09 03:02:56,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:56,280 INFO L225 Difference]: With dead ends: 3641 [2022-02-09 03:02:56,280 INFO L226 Difference]: Without dead ends: 3603 [2022-02-09 03:02:56,281 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 [2022-02-09 03:02:56,281 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 485 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:02:56,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [485 Valid, 390 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1346 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 03:02:56,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3603 states. [2022-02-09 03:02:56,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3603 to 2862. [2022-02-09 03:02:56,327 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) [2022-02-09 03:02:56,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 12965 transitions. [2022-02-09 03:02:56,336 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 12965 transitions. Word has length 29 [2022-02-09 03:02:56,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:56,337 INFO L470 AbstractCegarLoop]: Abstraction has 2862 states and 12965 transitions. [2022-02-09 03:02:56,337 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) [2022-02-09 03:02:56,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 12965 transitions. [2022-02-09 03:02:56,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:56,342 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:56,342 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] [2022-02-09 03:02:56,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:56,555 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 [2022-02-09 03:02:56,555 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:56,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:56,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1483154473, now seen corresponding path program 20 times [2022-02-09 03:02:56,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:56,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022428367] [2022-02-09 03:02:56,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:56,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:56,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:56,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022428367] [2022-02-09 03:02:56,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022428367] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:56,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961020295] [2022-02-09 03:02:56,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:02:56,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:56,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:56,661 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) [2022-02-09 03:02:56,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-02-09 03:02:56,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:02:56,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:56,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:56,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:56,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:56,836 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 [2022-02-09 03:02:57,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:57,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:57,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:57,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961020295] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:57,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:57,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-02-09 03:02:57,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794011014] [2022-02-09 03:02:57,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:57,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:02:57,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:57,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:02:57,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:02:57,217 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) [2022-02-09 03:02:57,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:57,753 INFO L93 Difference]: Finished difference Result 3080 states and 13720 transitions. [2022-02-09 03:02:57,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-09 03:02:57,753 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 [2022-02-09 03:02:57,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:57,761 INFO L225 Difference]: With dead ends: 3080 [2022-02-09 03:02:57,761 INFO L226 Difference]: Without dead ends: 3067 [2022-02-09 03:02:57,761 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 [2022-02-09 03:02:57,761 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:02:57,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 284 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:02:57,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3067 states. [2022-02-09 03:02:57,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3067 to 2862. [2022-02-09 03:02:57,798 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) [2022-02-09 03:02:57,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 12962 transitions. [2022-02-09 03:02:57,806 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 12962 transitions. Word has length 29 [2022-02-09 03:02:57,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:57,806 INFO L470 AbstractCegarLoop]: Abstraction has 2862 states and 12962 transitions. [2022-02-09 03:02:57,807 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) [2022-02-09 03:02:57,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 12962 transitions. [2022-02-09 03:02:57,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:57,811 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:57,812 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] [2022-02-09 03:02:57,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-02-09 03:02:58,027 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 [2022-02-09 03:02:58,027 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:58,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:58,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1912450751, now seen corresponding path program 21 times [2022-02-09 03:02:58,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:58,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523407421] [2022-02-09 03:02:58,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:58,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:58,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:58,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523407421] [2022-02-09 03:02:58,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523407421] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:58,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378312528] [2022-02-09 03:02:58,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:02:58,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:58,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:58,182 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) [2022-02-09 03:02:58,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-02-09 03:02:58,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-09 03:02:58,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:58,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:58,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:02:58,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:02:58,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-02-09 03:02:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:58,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:02:58,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:58,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378312528] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:02:58,750 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:02:58,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-09 03:02:58,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051094775] [2022-02-09 03:02:58,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:02:58,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:02:58,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:02:58,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:02:58,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:02:58,751 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) [2022-02-09 03:02:59,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:02:59,439 INFO L93 Difference]: Finished difference Result 3113 states and 13817 transitions. [2022-02-09 03:02:59,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-09 03:02:59,440 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 [2022-02-09 03:02:59,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:02:59,448 INFO L225 Difference]: With dead ends: 3113 [2022-02-09 03:02:59,448 INFO L226 Difference]: Without dead ends: 3085 [2022-02-09 03:02:59,449 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 [2022-02-09 03:02:59,449 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 217 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:02:59,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 332 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 03:02:59,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2022-02-09 03:02:59,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 2808. [2022-02-09 03:02:59,494 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) [2022-02-09 03:02:59,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2808 states to 2808 states and 12722 transitions. [2022-02-09 03:02:59,504 INFO L78 Accepts]: Start accepts. Automaton has 2808 states and 12722 transitions. Word has length 29 [2022-02-09 03:02:59,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:02:59,504 INFO L470 AbstractCegarLoop]: Abstraction has 2808 states and 12722 transitions. [2022-02-09 03:02:59,504 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) [2022-02-09 03:02:59,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2808 states and 12722 transitions. [2022-02-09 03:02:59,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:02:59,509 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:02:59,509 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] [2022-02-09 03:02:59,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-02-09 03:02:59,727 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 [2022-02-09 03:02:59,728 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:02:59,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:02:59,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1052336511, now seen corresponding path program 22 times [2022-02-09 03:02:59,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:02:59,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317563857] [2022-02-09 03:02:59,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:02:59,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:02:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:02:59,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:02:59,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:02:59,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317563857] [2022-02-09 03:02:59,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317563857] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:02:59,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155495477] [2022-02-09 03:02:59,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:02:59,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:02:59,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:02:59,858 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) [2022-02-09 03:02:59,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-02-09 03:02:59,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:02:59,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:02:59,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:02:59,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:00,049 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 [2022-02-09 03:03:00,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:00,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:00,326 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:03:00,326 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 [2022-02-09 03:03:00,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:03:00,336 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-02-09 03:03:00,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:00,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155495477] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:00,389 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:00,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-09 03:03:00,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75874588] [2022-02-09 03:03:00,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:00,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-09 03:03:00,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:00,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-09 03:03:00,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-02-09 03:03:00,390 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) [2022-02-09 03:03:01,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:01,458 INFO L93 Difference]: Finished difference Result 3497 states and 15184 transitions. [2022-02-09 03:03:01,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-09 03:03:01,458 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 [2022-02-09 03:03:01,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:01,467 INFO L225 Difference]: With dead ends: 3497 [2022-02-09 03:03:01,467 INFO L226 Difference]: Without dead ends: 3448 [2022-02-09 03:03:01,467 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 [2022-02-09 03:03:01,467 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, 0.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:03:01,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 700 Invalid, 2318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2267 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-09 03:03:01,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3448 states. [2022-02-09 03:03:01,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3448 to 2796. [2022-02-09 03:03:01,510 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) [2022-02-09 03:03:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 12677 transitions. [2022-02-09 03:03:01,519 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 12677 transitions. Word has length 29 [2022-02-09 03:03:01,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:01,519 INFO L470 AbstractCegarLoop]: Abstraction has 2796 states and 12677 transitions. [2022-02-09 03:03:01,519 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) [2022-02-09 03:03:01,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 12677 transitions. [2022-02-09 03:03:01,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:03:01,524 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:01,524 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] [2022-02-09 03:03:01,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-02-09 03:03:01,740 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 [2022-02-09 03:03:01,740 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:01,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:01,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1088211267, now seen corresponding path program 23 times [2022-02-09 03:03:01,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:01,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887517929] [2022-02-09 03:03:01,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:01,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:01,820 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:01,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887517929] [2022-02-09 03:03:01,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887517929] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:01,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725001963] [2022-02-09 03:03:01,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:03:01,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:01,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:01,821 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) [2022-02-09 03:03:01,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-02-09 03:03:01,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:03:01,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:01,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:03:01,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:01,972 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 [2022-02-09 03:03:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:02,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:02,114 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:03:02,135 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 [2022-02-09 03:03:02,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:03:02,142 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 [2022-02-09 03:03:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:02,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725001963] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:02,189 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:02,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-02-09 03:03:02,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307182810] [2022-02-09 03:03:02,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:02,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:03:02,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:02,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:03:02,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:03:02,189 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) [2022-02-09 03:03:02,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:02,915 INFO L93 Difference]: Finished difference Result 4024 states and 17301 transitions. [2022-02-09 03:03:02,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-09 03:03:02,915 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 [2022-02-09 03:03:02,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:02,926 INFO L225 Difference]: With dead ends: 4024 [2022-02-09 03:03:02,926 INFO L226 Difference]: Without dead ends: 3986 [2022-02-09 03:03:02,926 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 [2022-02-09 03:03:02,926 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:03:02,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 446 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 03:03:02,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2022-02-09 03:03:02,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 2951. [2022-02-09 03:03:02,978 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) [2022-02-09 03:03:02,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2951 states to 2951 states and 13401 transitions. [2022-02-09 03:03:02,986 INFO L78 Accepts]: Start accepts. Automaton has 2951 states and 13401 transitions. Word has length 29 [2022-02-09 03:03:02,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:02,986 INFO L470 AbstractCegarLoop]: Abstraction has 2951 states and 13401 transitions. [2022-02-09 03:03:02,986 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) [2022-02-09 03:03:02,986 INFO L276 IsEmpty]: Start isEmpty. Operand 2951 states and 13401 transitions. [2022-02-09 03:03:02,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:03:02,992 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:02,992 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] [2022-02-09 03:03:03,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-02-09 03:03:03,207 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 [2022-02-09 03:03:03,208 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:03,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:03,208 INFO L85 PathProgramCache]: Analyzing trace with hash 215061339, now seen corresponding path program 24 times [2022-02-09 03:03:03,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:03,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869547300] [2022-02-09 03:03:03,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:03,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:03,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:03,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:03,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869547300] [2022-02-09 03:03:03,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869547300] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:03,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517766792] [2022-02-09 03:03:03,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:03:03,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:03,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:03,314 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) [2022-02-09 03:03:03,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-02-09 03:03:03,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-09 03:03:03,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:03,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:03:03,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:03,581 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:03:03,582 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 15 treesize of output 19 [2022-02-09 03:03:03,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:03,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:03,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517766792] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:03,967 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:03,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 18 [2022-02-09 03:03:03,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091084066] [2022-02-09 03:03:03,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:03,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-09 03:03:03,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:03,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-09 03:03:03,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-02-09 03:03:03,968 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) [2022-02-09 03:03:04,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:04,532 INFO L93 Difference]: Finished difference Result 3262 states and 14473 transitions. [2022-02-09 03:03:04,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-09 03:03:04,532 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 [2022-02-09 03:03:04,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:04,543 INFO L225 Difference]: With dead ends: 3262 [2022-02-09 03:03:04,543 INFO L226 Difference]: Without dead ends: 3249 [2022-02-09 03:03:04,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2022-02-09 03:03:04,543 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:03:04,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 348 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1186 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:03:04,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3249 states. [2022-02-09 03:03:04,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3249 to 2951. [2022-02-09 03:03:04,589 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) [2022-02-09 03:03:04,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2951 states to 2951 states and 13398 transitions. [2022-02-09 03:03:04,602 INFO L78 Accepts]: Start accepts. Automaton has 2951 states and 13398 transitions. Word has length 29 [2022-02-09 03:03:04,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:04,603 INFO L470 AbstractCegarLoop]: Abstraction has 2951 states and 13398 transitions. [2022-02-09 03:03:04,603 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) [2022-02-09 03:03:04,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2951 states and 13398 transitions. [2022-02-09 03:03:04,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:03:04,610 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:04,610 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] [2022-02-09 03:03:04,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-02-09 03:03:04,811 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 [2022-02-09 03:03:04,811 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:04,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:04,812 INFO L85 PathProgramCache]: Analyzing trace with hash -684300733, now seen corresponding path program 25 times [2022-02-09 03:03:04,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:04,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934703348] [2022-02-09 03:03:04,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:04,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:04,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:04,910 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:04,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934703348] [2022-02-09 03:03:04,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934703348] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:04,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295619005] [2022-02-09 03:03:04,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:03:04,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:04,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:04,912 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) [2022-02-09 03:03:04,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-02-09 03:03:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:04,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:03:04,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:05,131 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 [2022-02-09 03:03:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:05,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:05,333 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:03:05,333 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 [2022-02-09 03:03:05,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:03:05,344 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 [2022-02-09 03:03:05,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:05,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295619005] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:05,402 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:05,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-02-09 03:03:05,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322357022] [2022-02-09 03:03:05,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:05,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:03:05,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:05,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:03:05,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:03:05,403 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) [2022-02-09 03:03:06,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:06,522 INFO L93 Difference]: Finished difference Result 4082 states and 17431 transitions. [2022-02-09 03:03:06,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-09 03:03:06,522 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 [2022-02-09 03:03:06,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:06,533 INFO L225 Difference]: With dead ends: 4082 [2022-02-09 03:03:06,533 INFO L226 Difference]: Without dead ends: 4039 [2022-02-09 03:03:06,533 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 [2022-02-09 03:03:06,533 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 [2022-02-09 03:03:06,533 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] [2022-02-09 03:03:06,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4039 states. [2022-02-09 03:03:06,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4039 to 2900. [2022-02-09 03:03:06,585 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) [2022-02-09 03:03:06,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2900 states to 2900 states and 13167 transitions. [2022-02-09 03:03:06,652 INFO L78 Accepts]: Start accepts. Automaton has 2900 states and 13167 transitions. Word has length 29 [2022-02-09 03:03:06,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:06,652 INFO L470 AbstractCegarLoop]: Abstraction has 2900 states and 13167 transitions. [2022-02-09 03:03:06,652 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) [2022-02-09 03:03:06,652 INFO L276 IsEmpty]: Start isEmpty. Operand 2900 states and 13167 transitions. [2022-02-09 03:03:06,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:03:06,658 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:06,658 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] [2022-02-09 03:03:06,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-02-09 03:03:06,871 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 [2022-02-09 03:03:06,871 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:06,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:06,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1544414973, now seen corresponding path program 26 times [2022-02-09 03:03:06,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:06,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125737840] [2022-02-09 03:03:06,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:06,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:06,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:06,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125737840] [2022-02-09 03:03:06,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125737840] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:06,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886436868] [2022-02-09 03:03:06,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:03:06,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:06,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:06,977 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) [2022-02-09 03:03:06,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-02-09 03:03:07,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:03:07,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:07,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:03:07,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:07,165 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:03:07,165 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 [2022-02-09 03:03:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:07,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:07,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886436868] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:07,515 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:07,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-09 03:03:07,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548176336] [2022-02-09 03:03:07,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:07,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:03:07,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:07,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:03:07,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:03:07,516 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) [2022-02-09 03:03:08,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:08,008 INFO L93 Difference]: Finished difference Result 3123 states and 13925 transitions. [2022-02-09 03:03:08,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-09 03:03:08,008 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 [2022-02-09 03:03:08,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:08,017 INFO L225 Difference]: With dead ends: 3123 [2022-02-09 03:03:08,017 INFO L226 Difference]: Without dead ends: 3108 [2022-02-09 03:03:08,017 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 [2022-02-09 03:03:08,017 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:03:08,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 282 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:03:08,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3108 states. [2022-02-09 03:03:08,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3108 to 2888. [2022-02-09 03:03:08,057 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) [2022-02-09 03:03:08,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2888 states to 2888 states and 13122 transitions. [2022-02-09 03:03:08,065 INFO L78 Accepts]: Start accepts. Automaton has 2888 states and 13122 transitions. Word has length 29 [2022-02-09 03:03:08,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:08,065 INFO L470 AbstractCegarLoop]: Abstraction has 2888 states and 13122 transitions. [2022-02-09 03:03:08,065 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) [2022-02-09 03:03:08,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2888 states and 13122 transitions. [2022-02-09 03:03:08,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:03:08,070 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:08,071 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] [2022-02-09 03:03:08,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-02-09 03:03:08,271 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 [2022-02-09 03:03:08,271 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:08,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:08,271 INFO L85 PathProgramCache]: Analyzing trace with hash 2042885267, now seen corresponding path program 27 times [2022-02-09 03:03:08,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:08,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903696701] [2022-02-09 03:03:08,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:08,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:08,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:08,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:08,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903696701] [2022-02-09 03:03:08,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903696701] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:08,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955731100] [2022-02-09 03:03:08,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:03:08,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:08,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:08,370 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) [2022-02-09 03:03:08,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-02-09 03:03:08,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-09 03:03:08,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:08,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:03:08,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:08,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:03:08,589 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 [2022-02-09 03:03:08,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:08,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:08,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:08,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955731100] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:08,879 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:08,879 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-02-09 03:03:08,879 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232596063] [2022-02-09 03:03:08,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:08,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-09 03:03:08,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:08,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-09 03:03:08,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-02-09 03:03:08,896 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) [2022-02-09 03:03:09,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:09,807 INFO L93 Difference]: Finished difference Result 3227 states and 14154 transitions. [2022-02-09 03:03:09,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-09 03:03:09,807 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 [2022-02-09 03:03:09,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:09,815 INFO L225 Difference]: With dead ends: 3227 [2022-02-09 03:03:09,815 INFO L226 Difference]: Without dead ends: 3212 [2022-02-09 03:03:09,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2022-02-09 03:03:09,815 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 246 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-02-09 03:03:09,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 445 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-09 03:03:09,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3212 states. [2022-02-09 03:03:09,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3212 to 2896. [2022-02-09 03:03:09,852 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) [2022-02-09 03:03:09,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 13144 transitions. [2022-02-09 03:03:09,860 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 13144 transitions. Word has length 29 [2022-02-09 03:03:09,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:09,860 INFO L470 AbstractCegarLoop]: Abstraction has 2896 states and 13144 transitions. [2022-02-09 03:03:09,860 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) [2022-02-09 03:03:09,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 13144 transitions. [2022-02-09 03:03:09,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:03:09,865 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:09,865 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] [2022-02-09 03:03:09,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-02-09 03:03:10,080 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 [2022-02-09 03:03:10,080 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:10,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:10,081 INFO L85 PathProgramCache]: Analyzing trace with hash 221849841, now seen corresponding path program 28 times [2022-02-09 03:03:10,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:10,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591078585] [2022-02-09 03:03:10,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:10,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:10,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:10,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591078585] [2022-02-09 03:03:10,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591078585] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:10,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729574045] [2022-02-09 03:03:10,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:03:10,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:10,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:10,187 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) [2022-02-09 03:03:10,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-02-09 03:03:10,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:03:10,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:10,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:03:10,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:10,433 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 [2022-02-09 03:03:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:10,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:10,662 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:03:10,662 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 [2022-02-09 03:03:10,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:03:10,672 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 [2022-02-09 03:03:10,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:10,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729574045] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:10,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:10,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-09 03:03:10,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104383185] [2022-02-09 03:03:10,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:10,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-09 03:03:10,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:10,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-09 03:03:10,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-02-09 03:03:10,738 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) [2022-02-09 03:03:12,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:12,086 INFO L93 Difference]: Finished difference Result 3822 states and 16496 transitions. [2022-02-09 03:03:12,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-09 03:03:12,086 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 [2022-02-09 03:03:12,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:12,096 INFO L225 Difference]: With dead ends: 3822 [2022-02-09 03:03:12,096 INFO L226 Difference]: Without dead ends: 3792 [2022-02-09 03:03:12,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=220, Invalid=1502, Unknown=0, NotChecked=0, Total=1722 [2022-02-09 03:03:12,097 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 338 mSDsluCounter, 1683 mSDsCounter, 0 mSdLazyCounter, 2250 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-02-09 03:03:12,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 691 Invalid, 2294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2250 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-09 03:03:12,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3792 states. [2022-02-09 03:03:12,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3792 to 2896. [2022-02-09 03:03:12,143 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) [2022-02-09 03:03:12,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 13147 transitions. [2022-02-09 03:03:12,154 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 13147 transitions. Word has length 29 [2022-02-09 03:03:12,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:12,154 INFO L470 AbstractCegarLoop]: Abstraction has 2896 states and 13147 transitions. [2022-02-09 03:03:12,154 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) [2022-02-09 03:03:12,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 13147 transitions. [2022-02-09 03:03:12,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:03:12,159 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:12,159 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] [2022-02-09 03:03:12,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-02-09 03:03:12,376 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 [2022-02-09 03:03:12,376 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:12,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:12,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1437686031, now seen corresponding path program 15 times [2022-02-09 03:03:12,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:12,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843241697] [2022-02-09 03:03:12,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:12,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:12,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:12,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:12,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843241697] [2022-02-09 03:03:12,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843241697] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:12,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606752108] [2022-02-09 03:03:12,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:03:12,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:12,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:12,485 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) [2022-02-09 03:03:12,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-02-09 03:03:12,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-09 03:03:12,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:12,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:03:12,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:12,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:03:12,678 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2022-02-09 03:03:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:12,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:13,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606752108] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:13,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:13,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-09 03:03:13,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256126946] [2022-02-09 03:03:13,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:13,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:03:13,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:13,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:03:13,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:03:13,056 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) [2022-02-09 03:03:13,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:13,731 INFO L93 Difference]: Finished difference Result 3431 states and 15157 transitions. [2022-02-09 03:03:13,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-09 03:03:13,731 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 [2022-02-09 03:03:13,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:13,740 INFO L225 Difference]: With dead ends: 3431 [2022-02-09 03:03:13,741 INFO L226 Difference]: Without dead ends: 3412 [2022-02-09 03:03:13,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2022-02-09 03:03:13,741 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:03:13,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 332 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 03:03:13,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3412 states. [2022-02-09 03:03:13,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3412 to 2939. [2022-02-09 03:03:13,783 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) [2022-02-09 03:03:13,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2939 states to 2939 states and 13319 transitions. [2022-02-09 03:03:13,791 INFO L78 Accepts]: Start accepts. Automaton has 2939 states and 13319 transitions. Word has length 29 [2022-02-09 03:03:13,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:13,791 INFO L470 AbstractCegarLoop]: Abstraction has 2939 states and 13319 transitions. [2022-02-09 03:03:13,792 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) [2022-02-09 03:03:13,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2939 states and 13319 transitions. [2022-02-09 03:03:13,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:03:13,797 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:13,797 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] [2022-02-09 03:03:13,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-02-09 03:03:14,012 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 [2022-02-09 03:03:14,013 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:14,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:14,013 INFO L85 PathProgramCache]: Analyzing trace with hash -15331205, now seen corresponding path program 16 times [2022-02-09 03:03:14,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:14,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395586883] [2022-02-09 03:03:14,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:14,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:14,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:14,100 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:14,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395586883] [2022-02-09 03:03:14,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395586883] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:14,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525327599] [2022-02-09 03:03:14,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:03:14,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:14,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:14,101 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) [2022-02-09 03:03:14,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-02-09 03:03:14,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:03:14,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:14,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:03:14,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:14,292 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 [2022-02-09 03:03:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:14,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:14,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:03:14,529 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 [2022-02-09 03:03:14,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:03:14,540 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 [2022-02-09 03:03:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:14,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525327599] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:14,593 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:14,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:03:14,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277873560] [2022-02-09 03:03:14,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:14,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:03:14,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:14,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:03:14,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:03:14,593 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) [2022-02-09 03:03:15,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:15,503 INFO L93 Difference]: Finished difference Result 4321 states and 18515 transitions. [2022-02-09 03:03:15,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-09 03:03:15,504 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 [2022-02-09 03:03:15,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:15,515 INFO L225 Difference]: With dead ends: 4321 [2022-02-09 03:03:15,516 INFO L226 Difference]: Without dead ends: 4293 [2022-02-09 03:03:15,516 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 [2022-02-09 03:03:15,516 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 [2022-02-09 03:03:15,516 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] [2022-02-09 03:03:15,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4293 states. [2022-02-09 03:03:15,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4293 to 3083. [2022-02-09 03:03:15,572 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) [2022-02-09 03:03:15,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3083 states to 3083 states and 13995 transitions. [2022-02-09 03:03:15,648 INFO L78 Accepts]: Start accepts. Automaton has 3083 states and 13995 transitions. Word has length 29 [2022-02-09 03:03:15,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:15,648 INFO L470 AbstractCegarLoop]: Abstraction has 3083 states and 13995 transitions. [2022-02-09 03:03:15,648 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) [2022-02-09 03:03:15,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3083 states and 13995 transitions. [2022-02-09 03:03:15,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:03:15,655 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:15,655 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] [2022-02-09 03:03:15,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-02-09 03:03:15,871 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 [2022-02-09 03:03:15,871 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:15,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:15,871 INFO L85 PathProgramCache]: Analyzing trace with hash 385542327, now seen corresponding path program 17 times [2022-02-09 03:03:15,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:15,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385461554] [2022-02-09 03:03:15,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:15,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:15,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:15,957 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:15,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385461554] [2022-02-09 03:03:15,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385461554] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:15,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220693468] [2022-02-09 03:03:15,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:03:15,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:15,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:15,959 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) [2022-02-09 03:03:15,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-02-09 03:03:15,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:03:15,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:15,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:03:15,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:16,112 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 [2022-02-09 03:03:16,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:16,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:16,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:03:16,330 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-02-09 03:03:16,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:03:16,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-02-09 03:03:16,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:16,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220693468] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:16,383 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:16,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:03:16,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813734022] [2022-02-09 03:03:16,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:16,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:03:16,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:16,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:03:16,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:03:16,384 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) [2022-02-09 03:03:17,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:17,281 INFO L93 Difference]: Finished difference Result 4335 states and 18554 transitions. [2022-02-09 03:03:17,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-09 03:03:17,281 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 [2022-02-09 03:03:17,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:17,292 INFO L225 Difference]: With dead ends: 4335 [2022-02-09 03:03:17,293 INFO L226 Difference]: Without dead ends: 4302 [2022-02-09 03:03:17,293 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 [2022-02-09 03:03:17,293 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, 0.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:03:17,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 520 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1676 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-09 03:03:17,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4302 states. [2022-02-09 03:03:17,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4302 to 3015. [2022-02-09 03:03:17,346 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) [2022-02-09 03:03:17,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 13690 transitions. [2022-02-09 03:03:17,356 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 13690 transitions. Word has length 29 [2022-02-09 03:03:17,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:17,356 INFO L470 AbstractCegarLoop]: Abstraction has 3015 states and 13690 transitions. [2022-02-09 03:03:17,356 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) [2022-02-09 03:03:17,356 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 13690 transitions. [2022-02-09 03:03:17,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:03:17,361 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:17,361 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] [2022-02-09 03:03:17,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-02-09 03:03:17,577 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 [2022-02-09 03:03:17,577 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:17,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:17,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1616862839, now seen corresponding path program 18 times [2022-02-09 03:03:17,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:17,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958955044] [2022-02-09 03:03:17,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:17,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:17,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:17,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958955044] [2022-02-09 03:03:17,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958955044] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:17,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279377827] [2022-02-09 03:03:17,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:03:17,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:17,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:17,679 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) [2022-02-09 03:03:17,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-02-09 03:03:17,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-09 03:03:17,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:17,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:03:17,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:17,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:03:17,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-02-09 03:03:18,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:18,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:18,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279377827] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:18,313 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:18,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-09 03:03:18,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425469551] [2022-02-09 03:03:18,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:18,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:03:18,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:18,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:03:18,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:03:18,313 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) [2022-02-09 03:03:18,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:18,782 INFO L93 Difference]: Finished difference Result 3287 states and 14668 transitions. [2022-02-09 03:03:18,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-09 03:03:18,782 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 [2022-02-09 03:03:18,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:18,790 INFO L225 Difference]: With dead ends: 3287 [2022-02-09 03:03:18,791 INFO L226 Difference]: Without dead ends: 3272 [2022-02-09 03:03:18,791 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 [2022-02-09 03:03:18,791 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 172 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-02-09 03:03:18,791 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] [2022-02-09 03:03:18,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2022-02-09 03:03:18,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2997. [2022-02-09 03:03:18,845 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) [2022-02-09 03:03:18,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 13618 transitions. [2022-02-09 03:03:18,856 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 13618 transitions. Word has length 29 [2022-02-09 03:03:18,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:18,856 INFO L470 AbstractCegarLoop]: Abstraction has 2997 states and 13618 transitions. [2022-02-09 03:03:18,856 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) [2022-02-09 03:03:18,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 13618 transitions. [2022-02-09 03:03:18,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:03:18,863 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:18,863 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] [2022-02-09 03:03:18,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-02-09 03:03:19,071 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 [2022-02-09 03:03:19,072 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:19,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:19,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1364453939, now seen corresponding path program 19 times [2022-02-09 03:03:19,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:19,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767201354] [2022-02-09 03:03:19,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:19,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:19,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:19,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767201354] [2022-02-09 03:03:19,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767201354] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:19,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635074742] [2022-02-09 03:03:19,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:03:19,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:19,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:19,173 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) [2022-02-09 03:03:19,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-02-09 03:03:19,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:19,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:03:19,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:19,448 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 [2022-02-09 03:03:19,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:19,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:19,694 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:03:19,695 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 [2022-02-09 03:03:19,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:03:19,704 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-02-09 03:03:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:19,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635074742] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:19,762 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:19,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-09 03:03:19,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814934750] [2022-02-09 03:03:19,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:19,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-09 03:03:19,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:19,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-09 03:03:19,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-02-09 03:03:19,763 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) [2022-02-09 03:03:20,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:20,732 INFO L93 Difference]: Finished difference Result 3324 states and 14803 transitions. [2022-02-09 03:03:20,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-09 03:03:20,733 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 [2022-02-09 03:03:20,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:20,741 INFO L225 Difference]: With dead ends: 3324 [2022-02-09 03:03:20,741 INFO L226 Difference]: Without dead ends: 3309 [2022-02-09 03:03:20,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-02-09 03:03:20,742 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 324 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:03:20,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 385 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1297 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 03:03:20,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3309 states. [2022-02-09 03:03:20,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3309 to 2991. [2022-02-09 03:03:20,779 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) [2022-02-09 03:03:20,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 13599 transitions. [2022-02-09 03:03:20,788 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 13599 transitions. Word has length 29 [2022-02-09 03:03:20,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:20,788 INFO L470 AbstractCegarLoop]: Abstraction has 2991 states and 13599 transitions. [2022-02-09 03:03:20,788 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) [2022-02-09 03:03:20,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 13599 transitions. [2022-02-09 03:03:20,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:03:20,793 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:20,793 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] [2022-02-09 03:03:20,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-02-09 03:03:21,001 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 [2022-02-09 03:03:21,001 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:21,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:21,002 INFO L85 PathProgramCache]: Analyzing trace with hash -456581487, now seen corresponding path program 20 times [2022-02-09 03:03:21,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:21,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339937437] [2022-02-09 03:03:21,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:21,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:21,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:21,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339937437] [2022-02-09 03:03:21,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339937437] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:21,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531573223] [2022-02-09 03:03:21,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:03:21,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:21,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:21,107 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) [2022-02-09 03:03:21,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-02-09 03:03:21,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:03:21,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:21,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:03:21,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:21,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:03:21,386 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 [2022-02-09 03:03:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:21,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:21,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531573223] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:21,698 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:21,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-02-09 03:03:21,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545270693] [2022-02-09 03:03:21,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:21,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:03:21,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:21,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:03:21,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:03:21,698 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) [2022-02-09 03:03:22,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:22,197 INFO L93 Difference]: Finished difference Result 3244 states and 14493 transitions. [2022-02-09 03:03:22,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-09 03:03:22,197 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 [2022-02-09 03:03:22,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:22,205 INFO L225 Difference]: With dead ends: 3244 [2022-02-09 03:03:22,206 INFO L226 Difference]: Without dead ends: 3229 [2022-02-09 03:03:22,206 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 [2022-02-09 03:03:22,206 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:03:22,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 304 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:03:22,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2022-02-09 03:03:22,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 2972. [2022-02-09 03:03:22,245 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) [2022-02-09 03:03:22,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2972 states to 2972 states and 13530 transitions. [2022-02-09 03:03:22,255 INFO L78 Accepts]: Start accepts. Automaton has 2972 states and 13530 transitions. Word has length 29 [2022-02-09 03:03:22,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:22,255 INFO L470 AbstractCegarLoop]: Abstraction has 2972 states and 13530 transitions. [2022-02-09 03:03:22,255 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) [2022-02-09 03:03:22,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2972 states and 13530 transitions. [2022-02-09 03:03:22,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:03:22,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:22,260 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] [2022-02-09 03:03:22,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-02-09 03:03:22,467 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 [2022-02-09 03:03:22,468 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:22,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:22,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1831959469, now seen corresponding path program 21 times [2022-02-09 03:03:22,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:22,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056211425] [2022-02-09 03:03:22,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:22,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:22,568 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:22,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056211425] [2022-02-09 03:03:22,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056211425] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:22,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414163570] [2022-02-09 03:03:22,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:03:22,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:22,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:22,570 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) [2022-02-09 03:03:22,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-02-09 03:03:22,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-09 03:03:22,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:22,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:03:22,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:22,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:03:22,722 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 [2022-02-09 03:03:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:22,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:23,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:23,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414163570] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:23,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:23,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-09 03:03:23,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081017124] [2022-02-09 03:03:23,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:23,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:03:23,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:23,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:03:23,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:03:23,137 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) [2022-02-09 03:03:23,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:23,817 INFO L93 Difference]: Finished difference Result 3355 states and 14980 transitions. [2022-02-09 03:03:23,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-09 03:03:23,817 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 [2022-02-09 03:03:23,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:23,828 INFO L225 Difference]: With dead ends: 3355 [2022-02-09 03:03:23,828 INFO L226 Difference]: Without dead ends: 3336 [2022-02-09 03:03:23,829 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 [2022-02-09 03:03:23,829 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, 0.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:03:23,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 332 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-09 03:03:23,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2022-02-09 03:03:23,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 3012. [2022-02-09 03:03:23,874 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) [2022-02-09 03:03:23,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3012 states to 3012 states and 13699 transitions. [2022-02-09 03:03:23,883 INFO L78 Accepts]: Start accepts. Automaton has 3012 states and 13699 transitions. Word has length 29 [2022-02-09 03:03:23,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:23,883 INFO L470 AbstractCegarLoop]: Abstraction has 3012 states and 13699 transitions. [2022-02-09 03:03:23,883 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) [2022-02-09 03:03:23,883 INFO L276 IsEmpty]: Start isEmpty. Operand 3012 states and 13699 transitions. [2022-02-09 03:03:23,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:03:23,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:23,889 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] [2022-02-09 03:03:23,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-02-09 03:03:24,103 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 [2022-02-09 03:03:24,103 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:24,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:24,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1040653001, now seen corresponding path program 22 times [2022-02-09 03:03:24,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:24,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379837672] [2022-02-09 03:03:24,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:24,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:24,172 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:24,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379837672] [2022-02-09 03:03:24,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379837672] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:24,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968737263] [2022-02-09 03:03:24,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:03:24,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:24,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:24,174 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) [2022-02-09 03:03:24,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-02-09 03:03:24,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:03:24,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:24,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:03:24,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:24,279 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 [2022-02-09 03:03:24,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:24,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:24,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:03:24,477 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 [2022-02-09 03:03:24,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:03:24,503 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-02-09 03:03:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:24,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968737263] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:24,535 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:24,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:03:24,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018126795] [2022-02-09 03:03:24,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:24,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:03:24,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:24,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:03:24,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:03:24,535 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) [2022-02-09 03:03:25,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:25,180 INFO L93 Difference]: Finished difference Result 4029 states and 17462 transitions. [2022-02-09 03:03:25,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-09 03:03:25,181 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 [2022-02-09 03:03:25,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:25,191 INFO L225 Difference]: With dead ends: 4029 [2022-02-09 03:03:25,192 INFO L226 Difference]: Without dead ends: 4001 [2022-02-09 03:03:25,192 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 [2022-02-09 03:03:25,192 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 325 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-02-09 03:03:25,192 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] [2022-02-09 03:03:25,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2022-02-09 03:03:25,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 3137. [2022-02-09 03:03:25,246 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) [2022-02-09 03:03:25,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3137 states to 3137 states and 14265 transitions. [2022-02-09 03:03:25,256 INFO L78 Accepts]: Start accepts. Automaton has 3137 states and 14265 transitions. Word has length 29 [2022-02-09 03:03:25,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:25,256 INFO L470 AbstractCegarLoop]: Abstraction has 3137 states and 14265 transitions. [2022-02-09 03:03:25,256 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) [2022-02-09 03:03:25,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3137 states and 14265 transitions. [2022-02-09 03:03:25,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:03:25,263 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:25,263 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] [2022-02-09 03:03:25,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-02-09 03:03:25,479 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 [2022-02-09 03:03:25,479 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:25,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:25,480 INFO L85 PathProgramCache]: Analyzing trace with hash -639779469, now seen corresponding path program 23 times [2022-02-09 03:03:25,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:25,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900801934] [2022-02-09 03:03:25,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:25,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:25,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:25,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900801934] [2022-02-09 03:03:25,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900801934] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:25,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918816888] [2022-02-09 03:03:25,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:03:25,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:25,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:25,574 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) [2022-02-09 03:03:25,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-02-09 03:03:25,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:03:25,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:25,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:03:25,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:25,679 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 [2022-02-09 03:03:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:25,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:25,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:03:25,861 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 [2022-02-09 03:03:25,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:03:25,868 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 [2022-02-09 03:03:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:25,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918816888] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:25,899 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:25,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:03:25,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6636530] [2022-02-09 03:03:25,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:25,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:03:25,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:25,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:03:25,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:03:25,900 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) [2022-02-09 03:03:26,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:26,543 INFO L93 Difference]: Finished difference Result 4043 states and 17501 transitions. [2022-02-09 03:03:26,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-09 03:03:26,544 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 [2022-02-09 03:03:26,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:26,554 INFO L225 Difference]: With dead ends: 4043 [2022-02-09 03:03:26,554 INFO L226 Difference]: Without dead ends: 4010 [2022-02-09 03:03:26,555 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 [2022-02-09 03:03:26,555 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 357 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-02-09 03:03:26,555 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] [2022-02-09 03:03:26,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4010 states. [2022-02-09 03:03:26,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4010 to 3038. [2022-02-09 03:03:26,635 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) [2022-02-09 03:03:26,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 13827 transitions. [2022-02-09 03:03:26,644 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 13827 transitions. Word has length 29 [2022-02-09 03:03:26,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:26,645 INFO L470 AbstractCegarLoop]: Abstraction has 3038 states and 13827 transitions. [2022-02-09 03:03:26,645 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) [2022-02-09 03:03:26,645 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 13827 transitions. [2022-02-09 03:03:26,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:03:26,653 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:26,653 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] [2022-02-09 03:03:26,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-02-09 03:03:26,870 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 [2022-02-09 03:03:26,870 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:26,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:26,871 INFO L85 PathProgramCache]: Analyzing trace with hash 591541043, now seen corresponding path program 24 times [2022-02-09 03:03:26,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:26,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260776160] [2022-02-09 03:03:26,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:26,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:26,951 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:26,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260776160] [2022-02-09 03:03:26,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260776160] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:26,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682599409] [2022-02-09 03:03:26,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:03:26,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:26,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:26,952 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) [2022-02-09 03:03:26,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-02-09 03:03:26,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-09 03:03:26,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:26,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:03:27,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:27,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:03:27,072 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 [2022-02-09 03:03:27,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:27,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:27,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682599409] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:27,365 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:27,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-09 03:03:27,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495364900] [2022-02-09 03:03:27,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:27,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:03:27,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:27,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:03:27,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:03:27,366 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) [2022-02-09 03:03:27,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:27,768 INFO L93 Difference]: Finished difference Result 3150 states and 14218 transitions. [2022-02-09 03:03:27,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-09 03:03:27,769 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 [2022-02-09 03:03:27,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:27,778 INFO L225 Difference]: With dead ends: 3150 [2022-02-09 03:03:27,779 INFO L226 Difference]: Without dead ends: 3135 [2022-02-09 03:03:27,779 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 [2022-02-09 03:03:27,779 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 128 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-02-09 03:03:27,779 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] [2022-02-09 03:03:27,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2022-02-09 03:03:27,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 3017. [2022-02-09 03:03:27,824 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) [2022-02-09 03:03:27,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 13746 transitions. [2022-02-09 03:03:27,834 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 13746 transitions. Word has length 29 [2022-02-09 03:03:27,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:27,834 INFO L470 AbstractCegarLoop]: Abstraction has 3017 states and 13746 transitions. [2022-02-09 03:03:27,834 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) [2022-02-09 03:03:27,834 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 13746 transitions. [2022-02-09 03:03:27,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:03:27,840 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:27,840 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] [2022-02-09 03:03:27,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-02-09 03:03:28,056 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 [2022-02-09 03:03:28,057 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:28,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:28,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1215097935, now seen corresponding path program 25 times [2022-02-09 03:03:28,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:28,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994482992] [2022-02-09 03:03:28,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:28,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:28,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:28,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:28,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994482992] [2022-02-09 03:03:28,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994482992] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:28,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446161963] [2022-02-09 03:03:28,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:03:28,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:28,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:28,172 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) [2022-02-09 03:03:28,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-02-09 03:03:28,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:28,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:03:28,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:28,336 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 [2022-02-09 03:03:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:28,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:28,590 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:03:28,590 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 22 [2022-02-09 03:03:28,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:03:28,599 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 [2022-02-09 03:03:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:28,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446161963] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:28,648 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:28,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-02-09 03:03:28,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767183154] [2022-02-09 03:03:28,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:28,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:03:28,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:28,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:03:28,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:03:28,649 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) [2022-02-09 03:03:29,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:29,803 INFO L93 Difference]: Finished difference Result 4128 states and 17779 transitions. [2022-02-09 03:03:29,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-09 03:03:29,804 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 [2022-02-09 03:03:29,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:29,817 INFO L225 Difference]: With dead ends: 4128 [2022-02-09 03:03:29,818 INFO L226 Difference]: Without dead ends: 4090 [2022-02-09 03:03:29,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2022-02-09 03:03:29,818 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 515 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:03:29,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 412 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-09 03:03:29,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4090 states. [2022-02-09 03:03:29,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4090 to 3177. [2022-02-09 03:03:29,876 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) [2022-02-09 03:03:29,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 14464 transitions. [2022-02-09 03:03:29,885 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 14464 transitions. Word has length 29 [2022-02-09 03:03:29,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:29,886 INFO L470 AbstractCegarLoop]: Abstraction has 3177 states and 14464 transitions. [2022-02-09 03:03:29,886 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) [2022-02-09 03:03:29,886 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 14464 transitions. [2022-02-09 03:03:29,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:03:29,892 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:29,892 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] [2022-02-09 03:03:29,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-02-09 03:03:30,108 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 [2022-02-09 03:03:30,108 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:30,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:30,108 INFO L85 PathProgramCache]: Analyzing trace with hash 207256891, now seen corresponding path program 26 times [2022-02-09 03:03:30,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:30,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046798646] [2022-02-09 03:03:30,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:30,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:30,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:30,222 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:30,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046798646] [2022-02-09 03:03:30,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046798646] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:30,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81339754] [2022-02-09 03:03:30,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:03:30,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:30,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:30,223 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) [2022-02-09 03:03:30,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-02-09 03:03:30,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:03:30,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:30,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:03:30,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:30,384 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:03:30,384 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 [2022-02-09 03:03:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:30,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:30,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:30,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81339754] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:30,863 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:30,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 19 [2022-02-09 03:03:30,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231362572] [2022-02-09 03:03:30,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:30,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:03:30,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:30,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:03:30,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:03:30,864 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) [2022-02-09 03:03:31,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:31,337 INFO L93 Difference]: Finished difference Result 3501 states and 15546 transitions. [2022-02-09 03:03:31,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-09 03:03:31,338 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 [2022-02-09 03:03:31,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:31,350 INFO L225 Difference]: With dead ends: 3501 [2022-02-09 03:03:31,351 INFO L226 Difference]: Without dead ends: 3488 [2022-02-09 03:03:31,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=584, Unknown=0, NotChecked=0, Total=756 [2022-02-09 03:03:31,351 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 271 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-02-09 03:03:31,351 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] [2022-02-09 03:03:31,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3488 states. [2022-02-09 03:03:31,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3488 to 3177. [2022-02-09 03:03:31,417 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) [2022-02-09 03:03:31,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 14461 transitions. [2022-02-09 03:03:31,431 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 14461 transitions. Word has length 29 [2022-02-09 03:03:31,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:31,431 INFO L470 AbstractCegarLoop]: Abstraction has 3177 states and 14461 transitions. [2022-02-09 03:03:31,431 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) [2022-02-09 03:03:31,431 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 14461 transitions. [2022-02-09 03:03:31,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:03:31,439 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:31,439 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] [2022-02-09 03:03:31,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-02-09 03:03:31,663 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 [2022-02-09 03:03:31,663 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:31,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:31,663 INFO L85 PathProgramCache]: Analyzing trace with hash -237845129, now seen corresponding path program 27 times [2022-02-09 03:03:31,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:31,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241673457] [2022-02-09 03:03:31,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:31,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:31,778 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:31,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241673457] [2022-02-09 03:03:31,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241673457] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:31,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915007497] [2022-02-09 03:03:31,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:03:31,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:31,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:31,779 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) [2022-02-09 03:03:31,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-02-09 03:03:31,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-09 03:03:31,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:31,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:03:31,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:31,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:03:31,948 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 [2022-02-09 03:03:32,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:32,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:32,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915007497] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:32,349 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:32,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-02-09 03:03:32,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937707977] [2022-02-09 03:03:32,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:32,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-09 03:03:32,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:32,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-09 03:03:32,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-02-09 03:03:32,350 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) [2022-02-09 03:03:32,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:32,874 INFO L93 Difference]: Finished difference Result 3456 states and 15433 transitions. [2022-02-09 03:03:32,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-09 03:03:32,875 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 [2022-02-09 03:03:32,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:32,885 INFO L225 Difference]: With dead ends: 3456 [2022-02-09 03:03:32,886 INFO L226 Difference]: Without dead ends: 3428 [2022-02-09 03:03:32,886 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 [2022-02-09 03:03:32,886 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 205 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:03:32,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 349 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-09 03:03:32,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3428 states. [2022-02-09 03:03:32,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3428 to 3105. [2022-02-09 03:03:32,934 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) [2022-02-09 03:03:32,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3105 states to 3105 states and 14140 transitions. [2022-02-09 03:03:32,943 INFO L78 Accepts]: Start accepts. Automaton has 3105 states and 14140 transitions. Word has length 29 [2022-02-09 03:03:32,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:32,943 INFO L470 AbstractCegarLoop]: Abstraction has 3105 states and 14140 transitions. [2022-02-09 03:03:32,943 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) [2022-02-09 03:03:32,943 INFO L276 IsEmpty]: Start isEmpty. Operand 3105 states and 14140 transitions. [2022-02-09 03:03:32,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:03:32,949 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:32,949 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] [2022-02-09 03:03:32,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-02-09 03:03:33,155 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 [2022-02-09 03:03:33,155 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:33,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:33,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1376425363, now seen corresponding path program 28 times [2022-02-09 03:03:33,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:33,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262173220] [2022-02-09 03:03:33,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:33,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:33,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:33,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262173220] [2022-02-09 03:03:33,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262173220] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:33,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499979509] [2022-02-09 03:03:33,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:03:33,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:33,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:33,277 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) [2022-02-09 03:03:33,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-02-09 03:03:33,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:03:33,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:33,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:03:33,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:33,437 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 [2022-02-09 03:03:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:33,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:33,713 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:03:33,713 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 [2022-02-09 03:03:33,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:03:33,722 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 [2022-02-09 03:03:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:33,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499979509] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:33,770 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:33,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-02-09 03:03:33,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912261496] [2022-02-09 03:03:33,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:33,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-09 03:03:33,771 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:33,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-09 03:03:33,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-02-09 03:03:33,771 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) [2022-02-09 03:03:34,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:34,880 INFO L93 Difference]: Finished difference Result 3817 states and 16664 transitions. [2022-02-09 03:03:34,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-09 03:03:34,881 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 [2022-02-09 03:03:34,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:34,894 INFO L225 Difference]: With dead ends: 3817 [2022-02-09 03:03:34,894 INFO L226 Difference]: Without dead ends: 3779 [2022-02-09 03:03:34,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=1362, Unknown=0, NotChecked=0, Total=1560 [2022-02-09 03:03:34,894 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 381 mSDsluCounter, 1392 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:03:34,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 542 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-09 03:03:34,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3779 states. [2022-02-09 03:03:34,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3779 to 3105. [2022-02-09 03:03:34,957 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) [2022-02-09 03:03:35,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3105 states to 3105 states and 14140 transitions. [2022-02-09 03:03:35,006 INFO L78 Accepts]: Start accepts. Automaton has 3105 states and 14140 transitions. Word has length 29 [2022-02-09 03:03:35,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:35,006 INFO L470 AbstractCegarLoop]: Abstraction has 3105 states and 14140 transitions. [2022-02-09 03:03:35,006 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) [2022-02-09 03:03:35,006 INFO L276 IsEmpty]: Start isEmpty. Operand 3105 states and 14140 transitions. [2022-02-09 03:03:35,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-09 03:03:35,014 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:35,014 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] [2022-02-09 03:03:35,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-02-09 03:03:35,234 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 [2022-02-09 03:03:35,235 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:35,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:35,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1595564283, now seen corresponding path program 29 times [2022-02-09 03:03:35,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:35,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291960744] [2022-02-09 03:03:35,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:35,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:35,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:35,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:35,336 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:35,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291960744] [2022-02-09 03:03:35,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291960744] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:35,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817805517] [2022-02-09 03:03:35,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:03:35,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:35,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:35,338 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) [2022-02-09 03:03:35,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-02-09 03:03:35,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-09 03:03:35,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:35,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-09 03:03:35,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:35,530 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 [2022-02-09 03:03:35,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:35,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:35,810 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:03:35,811 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-02-09 03:03:35,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:03:35,821 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 [2022-02-09 03:03:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:35,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817805517] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:35,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:35,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-02-09 03:03:35,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650690260] [2022-02-09 03:03:35,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:35,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-09 03:03:35,871 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:35,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-09 03:03:35,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-09 03:03:35,871 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) [2022-02-09 03:03:36,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:36,750 INFO L93 Difference]: Finished difference Result 3772 states and 16519 transitions. [2022-02-09 03:03:36,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-09 03:03:36,750 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 [2022-02-09 03:03:36,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:36,760 INFO L225 Difference]: With dead ends: 3772 [2022-02-09 03:03:36,760 INFO L226 Difference]: Without dead ends: 3750 [2022-02-09 03:03:36,760 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 [2022-02-09 03:03:36,761 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 356 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-02-09 03:03:36,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 399 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-09 03:03:36,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3750 states. [2022-02-09 03:03:36,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3750 to 3063. [2022-02-09 03:03:36,813 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) [2022-02-09 03:03:36,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 13966 transitions. [2022-02-09 03:03:36,823 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 13966 transitions. Word has length 29 [2022-02-09 03:03:36,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:36,823 INFO L470 AbstractCegarLoop]: Abstraction has 3063 states and 13966 transitions. [2022-02-09 03:03:36,823 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) [2022-02-09 03:03:36,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 13966 transitions. [2022-02-09 03:03:36,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-09 03:03:36,829 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:36,829 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] [2022-02-09 03:03:36,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-02-09 03:03:37,043 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 [2022-02-09 03:03:37,043 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:37,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:37,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1771622066, now seen corresponding path program 30 times [2022-02-09 03:03:37,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:37,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306428653] [2022-02-09 03:03:37,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:37,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:37,065 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:37,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306428653] [2022-02-09 03:03:37,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306428653] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:37,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411656586] [2022-02-09 03:03:37,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:03:37,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:37,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:37,066 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) [2022-02-09 03:03:37,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-02-09 03:03:37,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-09 03:03:37,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:37,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 03:03:37,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:37,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:37,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:37,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411656586] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:37,202 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:37,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 7 [2022-02-09 03:03:37,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072883798] [2022-02-09 03:03:37,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:37,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-09 03:03:37,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:37,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-09 03:03:37,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-09 03:03:37,203 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) [2022-02-09 03:03:37,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:37,341 INFO L93 Difference]: Finished difference Result 4340 states and 18961 transitions. [2022-02-09 03:03:37,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-09 03:03:37,341 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 [2022-02-09 03:03:37,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:37,355 INFO L225 Difference]: With dead ends: 4340 [2022-02-09 03:03:37,356 INFO L226 Difference]: Without dead ends: 4261 [2022-02-09 03:03:37,356 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 [2022-02-09 03:03:37,356 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 [2022-02-09 03:03:37,356 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] [2022-02-09 03:03:37,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2022-02-09 03:03:37,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 3845. [2022-02-09 03:03:37,421 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) [2022-02-09 03:03:37,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3845 states to 3845 states and 17384 transitions. [2022-02-09 03:03:37,434 INFO L78 Accepts]: Start accepts. Automaton has 3845 states and 17384 transitions. Word has length 31 [2022-02-09 03:03:37,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:37,434 INFO L470 AbstractCegarLoop]: Abstraction has 3845 states and 17384 transitions. [2022-02-09 03:03:37,434 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) [2022-02-09 03:03:37,434 INFO L276 IsEmpty]: Start isEmpty. Operand 3845 states and 17384 transitions. [2022-02-09 03:03:37,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-09 03:03:37,441 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:37,441 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] [2022-02-09 03:03:37,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-02-09 03:03:37,658 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 [2022-02-09 03:03:37,658 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:37,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:37,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1488366286, now seen corresponding path program 31 times [2022-02-09 03:03:37,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:37,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997610925] [2022-02-09 03:03:37,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:37,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:37,707 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:37,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997610925] [2022-02-09 03:03:37,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997610925] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:37,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054559278] [2022-02-09 03:03:37,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:03:37,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:37,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:37,708 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) [2022-02-09 03:03:37,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-02-09 03:03:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:37,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-09 03:03:37,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:37,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:37,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054559278] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:37,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:37,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-02-09 03:03:37,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243092783] [2022-02-09 03:03:37,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:37,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-09 03:03:37,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:37,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-09 03:03:37,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-09 03:03:37,878 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) [2022-02-09 03:03:37,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:37,991 INFO L93 Difference]: Finished difference Result 4766 states and 20563 transitions. [2022-02-09 03:03:37,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-09 03:03:37,992 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 [2022-02-09 03:03:37,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:38,008 INFO L225 Difference]: With dead ends: 4766 [2022-02-09 03:03:38,008 INFO L226 Difference]: Without dead ends: 4649 [2022-02-09 03:03:38,009 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 [2022-02-09 03:03:38,009 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 [2022-02-09 03:03:38,009 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] [2022-02-09 03:03:38,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4649 states. [2022-02-09 03:03:38,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4649 to 3802. [2022-02-09 03:03:38,085 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) [2022-02-09 03:03:38,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3802 states to 3802 states and 16984 transitions. [2022-02-09 03:03:38,097 INFO L78 Accepts]: Start accepts. Automaton has 3802 states and 16984 transitions. Word has length 31 [2022-02-09 03:03:38,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:38,097 INFO L470 AbstractCegarLoop]: Abstraction has 3802 states and 16984 transitions. [2022-02-09 03:03:38,097 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) [2022-02-09 03:03:38,098 INFO L276 IsEmpty]: Start isEmpty. Operand 3802 states and 16984 transitions. [2022-02-09 03:03:38,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-09 03:03:38,105 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:38,105 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] [2022-02-09 03:03:38,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-02-09 03:03:38,305 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 [2022-02-09 03:03:38,305 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:38,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:38,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1280168432, now seen corresponding path program 32 times [2022-02-09 03:03:38,306 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:38,306 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419337862] [2022-02-09 03:03:38,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:38,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:38,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:38,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:38,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419337862] [2022-02-09 03:03:38,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419337862] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:38,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717903453] [2022-02-09 03:03:38,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:03:38,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:38,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:38,338 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) [2022-02-09 03:03:38,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-02-09 03:03:38,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:03:38,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:38,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 03:03:38,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:38,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:38,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:38,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717903453] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:38,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:38,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-02-09 03:03:38,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015984771] [2022-02-09 03:03:38,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:38,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-09 03:03:38,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:38,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-09 03:03:38,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-09 03:03:38,485 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) [2022-02-09 03:03:38,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:38,835 INFO L93 Difference]: Finished difference Result 6625 states and 27941 transitions. [2022-02-09 03:03:38,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-09 03:03:38,835 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 [2022-02-09 03:03:38,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:38,858 INFO L225 Difference]: With dead ends: 6625 [2022-02-09 03:03:38,858 INFO L226 Difference]: Without dead ends: 6329 [2022-02-09 03:03:38,858 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 [2022-02-09 03:03:38,858 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 331 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-09 03:03:38,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 415 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-09 03:03:38,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6329 states. [2022-02-09 03:03:38,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6329 to 5398. [2022-02-09 03:03:38,988 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) [2022-02-09 03:03:39,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5398 states to 5398 states and 23774 transitions. [2022-02-09 03:03:39,009 INFO L78 Accepts]: Start accepts. Automaton has 5398 states and 23774 transitions. Word has length 31 [2022-02-09 03:03:39,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:39,010 INFO L470 AbstractCegarLoop]: Abstraction has 5398 states and 23774 transitions. [2022-02-09 03:03:39,010 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) [2022-02-09 03:03:39,010 INFO L276 IsEmpty]: Start isEmpty. Operand 5398 states and 23774 transitions. [2022-02-09 03:03:39,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-09 03:03:39,022 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:39,022 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] [2022-02-09 03:03:39,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-02-09 03:03:39,240 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 [2022-02-09 03:03:39,241 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:39,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:39,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1366492460, now seen corresponding path program 33 times [2022-02-09 03:03:39,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:39,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586593012] [2022-02-09 03:03:39,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:39,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:39,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:39,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:39,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586593012] [2022-02-09 03:03:39,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586593012] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:39,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885439190] [2022-02-09 03:03:39,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:03:39,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:39,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:39,297 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) [2022-02-09 03:03:39,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-02-09 03:03:39,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-09 03:03:39,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:39,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 03:03:39,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:39,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:39,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885439190] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:39,450 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:39,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-02-09 03:03:39,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142414674] [2022-02-09 03:03:39,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:39,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-09 03:03:39,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:39,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-09 03:03:39,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-09 03:03:39,451 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) [2022-02-09 03:03:39,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:39,607 INFO L93 Difference]: Finished difference Result 6291 states and 26930 transitions. [2022-02-09 03:03:39,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-09 03:03:39,607 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 [2022-02-09 03:03:39,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:39,624 INFO L225 Difference]: With dead ends: 6291 [2022-02-09 03:03:39,624 INFO L226 Difference]: Without dead ends: 6219 [2022-02-09 03:03:39,624 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 [2022-02-09 03:03:39,624 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 [2022-02-09 03:03:39,624 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] [2022-02-09 03:03:39,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6219 states. [2022-02-09 03:03:39,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6219 to 5455. [2022-02-09 03:03:39,735 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) [2022-02-09 03:03:39,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5455 states to 5455 states and 23806 transitions. [2022-02-09 03:03:39,752 INFO L78 Accepts]: Start accepts. Automaton has 5455 states and 23806 transitions. Word has length 31 [2022-02-09 03:03:39,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:39,752 INFO L470 AbstractCegarLoop]: Abstraction has 5455 states and 23806 transitions. [2022-02-09 03:03:39,752 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) [2022-02-09 03:03:39,752 INFO L276 IsEmpty]: Start isEmpty. Operand 5455 states and 23806 transitions. [2022-02-09 03:03:39,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-09 03:03:39,762 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:39,762 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] [2022-02-09 03:03:39,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-02-09 03:03:39,976 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 [2022-02-09 03:03:39,976 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:39,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:39,977 INFO L85 PathProgramCache]: Analyzing trace with hash -540684862, now seen corresponding path program 34 times [2022-02-09 03:03:39,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:39,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958748312] [2022-02-09 03:03:39,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:39,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:40,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:40,005 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:40,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958748312] [2022-02-09 03:03:40,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958748312] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:40,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893969892] [2022-02-09 03:03:40,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:03:40,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:40,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:40,007 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) [2022-02-09 03:03:40,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-02-09 03:03:40,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:03:40,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:40,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-09 03:03:40,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:40,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:40,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893969892] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:40,135 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:40,135 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 7 [2022-02-09 03:03:40,135 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875346463] [2022-02-09 03:03:40,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:40,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-09 03:03:40,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:40,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-09 03:03:40,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-09 03:03:40,136 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) [2022-02-09 03:03:40,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:40,246 INFO L93 Difference]: Finished difference Result 7534 states and 32027 transitions. [2022-02-09 03:03:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-09 03:03:40,246 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 [2022-02-09 03:03:40,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:40,266 INFO L225 Difference]: With dead ends: 7534 [2022-02-09 03:03:40,267 INFO L226 Difference]: Without dead ends: 7474 [2022-02-09 03:03:40,267 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 [2022-02-09 03:03:40,267 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 [2022-02-09 03:03:40,267 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] [2022-02-09 03:03:40,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7474 states. [2022-02-09 03:03:40,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7474 to 6583. [2022-02-09 03:03:40,412 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) [2022-02-09 03:03:40,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6583 states to 6583 states and 28919 transitions. [2022-02-09 03:03:40,436 INFO L78 Accepts]: Start accepts. Automaton has 6583 states and 28919 transitions. Word has length 31 [2022-02-09 03:03:40,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:40,436 INFO L470 AbstractCegarLoop]: Abstraction has 6583 states and 28919 transitions. [2022-02-09 03:03:40,436 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) [2022-02-09 03:03:40,436 INFO L276 IsEmpty]: Start isEmpty. Operand 6583 states and 28919 transitions. [2022-02-09 03:03:40,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-09 03:03:40,449 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:40,450 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] [2022-02-09 03:03:40,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-02-09 03:03:40,666 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 [2022-02-09 03:03:40,667 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:40,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:40,668 INFO L85 PathProgramCache]: Analyzing trace with hash 552518790, now seen corresponding path program 35 times [2022-02-09 03:03:40,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:40,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109575726] [2022-02-09 03:03:40,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:40,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:40,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:40,691 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:40,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109575726] [2022-02-09 03:03:40,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109575726] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:40,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690410017] [2022-02-09 03:03:40,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:03:40,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:40,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:40,692 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) [2022-02-09 03:03:40,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-02-09 03:03:40,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-09 03:03:40,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:40,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-09 03:03:40,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:40,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:40,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:40,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690410017] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:40,805 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:40,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2022-02-09 03:03:40,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346191236] [2022-02-09 03:03:40,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:40,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-09 03:03:40,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:40,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-09 03:03:40,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-09 03:03:40,806 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) [2022-02-09 03:03:40,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:40,938 INFO L93 Difference]: Finished difference Result 8243 states and 34954 transitions. [2022-02-09 03:03:40,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-09 03:03:40,939 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 [2022-02-09 03:03:40,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:40,969 INFO L225 Difference]: With dead ends: 8243 [2022-02-09 03:03:40,969 INFO L226 Difference]: Without dead ends: 8171 [2022-02-09 03:03:40,969 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 [2022-02-09 03:03:40,970 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 [2022-02-09 03:03:40,970 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] [2022-02-09 03:03:40,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8171 states. [2022-02-09 03:03:41,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8171 to 6493. [2022-02-09 03:03:41,166 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) [2022-02-09 03:03:41,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6493 states to 6493 states and 28475 transitions. [2022-02-09 03:03:41,195 INFO L78 Accepts]: Start accepts. Automaton has 6493 states and 28475 transitions. Word has length 31 [2022-02-09 03:03:41,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:41,195 INFO L470 AbstractCegarLoop]: Abstraction has 6493 states and 28475 transitions. [2022-02-09 03:03:41,195 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) [2022-02-09 03:03:41,195 INFO L276 IsEmpty]: Start isEmpty. Operand 6493 states and 28475 transitions. [2022-02-09 03:03:41,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-09 03:03:41,211 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:41,211 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] [2022-02-09 03:03:41,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-02-09 03:03:41,429 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 [2022-02-09 03:03:41,430 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:41,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:41,430 INFO L85 PathProgramCache]: Analyzing trace with hash 891076900, now seen corresponding path program 36 times [2022-02-09 03:03:41,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:41,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293492855] [2022-02-09 03:03:41,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:41,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:41,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:41,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:41,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293492855] [2022-02-09 03:03:41,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293492855] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:41,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477153224] [2022-02-09 03:03:41,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:03:41,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:41,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:41,452 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) [2022-02-09 03:03:41,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-02-09 03:03:41,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-09 03:03:41,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:41,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-09 03:03:41,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:41,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:41,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477153224] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:41,593 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:41,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 7 [2022-02-09 03:03:41,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333461801] [2022-02-09 03:03:41,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:41,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-09 03:03:41,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:41,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-09 03:03:41,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-09 03:03:41,595 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) [2022-02-09 03:03:41,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:41,752 INFO L93 Difference]: Finished difference Result 8162 states and 34539 transitions. [2022-02-09 03:03:41,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-09 03:03:41,752 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 [2022-02-09 03:03:41,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:41,776 INFO L225 Difference]: With dead ends: 8162 [2022-02-09 03:03:41,776 INFO L226 Difference]: Without dead ends: 8084 [2022-02-09 03:03:41,776 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 [2022-02-09 03:03:41,776 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 [2022-02-09 03:03:41,776 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] [2022-02-09 03:03:41,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8084 states. [2022-02-09 03:03:41,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8084 to 6864. [2022-02-09 03:03:41,903 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) [2022-02-09 03:03:41,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6864 states to 6864 states and 30135 transitions. [2022-02-09 03:03:41,928 INFO L78 Accepts]: Start accepts. Automaton has 6864 states and 30135 transitions. Word has length 31 [2022-02-09 03:03:41,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:41,928 INFO L470 AbstractCegarLoop]: Abstraction has 6864 states and 30135 transitions. [2022-02-09 03:03:41,928 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) [2022-02-09 03:03:41,928 INFO L276 IsEmpty]: Start isEmpty. Operand 6864 states and 30135 transitions. [2022-02-09 03:03:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-09 03:03:41,943 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:41,943 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] [2022-02-09 03:03:41,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-02-09 03:03:42,159 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 [2022-02-09 03:03:42,159 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:42,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:42,159 INFO L85 PathProgramCache]: Analyzing trace with hash -457763008, now seen corresponding path program 37 times [2022-02-09 03:03:42,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:42,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139994220] [2022-02-09 03:03:42,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:42,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:42,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:42,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139994220] [2022-02-09 03:03:42,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139994220] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:42,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389838989] [2022-02-09 03:03:42,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:03:42,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:42,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:42,184 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) [2022-02-09 03:03:42,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-02-09 03:03:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:42,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-09 03:03:42,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:42,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:42,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389838989] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:42,318 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:42,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-02-09 03:03:42,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872781663] [2022-02-09 03:03:42,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:42,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-09 03:03:42,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:42,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-09 03:03:42,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-09 03:03:42,319 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) [2022-02-09 03:03:42,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:42,619 INFO L93 Difference]: Finished difference Result 8640 states and 36644 transitions. [2022-02-09 03:03:42,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-09 03:03:42,620 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 [2022-02-09 03:03:42,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:42,645 INFO L225 Difference]: With dead ends: 8640 [2022-02-09 03:03:42,645 INFO L226 Difference]: Without dead ends: 8442 [2022-02-09 03:03:42,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-02-09 03:03:42,645 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, 0.2s IncrementalHoareTripleChecker+Time [2022-02-09 03:03:42,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 274 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-09 03:03:42,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8442 states. [2022-02-09 03:03:42,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8442 to 7525. [2022-02-09 03:03:42,783 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) [2022-02-09 03:03:42,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7525 states to 7525 states and 32847 transitions. [2022-02-09 03:03:42,807 INFO L78 Accepts]: Start accepts. Automaton has 7525 states and 32847 transitions. Word has length 31 [2022-02-09 03:03:42,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:42,807 INFO L470 AbstractCegarLoop]: Abstraction has 7525 states and 32847 transitions. [2022-02-09 03:03:42,807 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) [2022-02-09 03:03:42,808 INFO L276 IsEmpty]: Start isEmpty. Operand 7525 states and 32847 transitions. [2022-02-09 03:03:42,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:03:42,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:42,822 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] [2022-02-09 03:03:42,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-02-09 03:03:43,038 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 [2022-02-09 03:03:43,039 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:43,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:43,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1383538257, now seen corresponding path program 38 times [2022-02-09 03:03:43,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:43,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475457205] [2022-02-09 03:03:43,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:43,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:43,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:43,282 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:43,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475457205] [2022-02-09 03:03:43,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475457205] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:43,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702497796] [2022-02-09 03:03:43,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:03:43,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:43,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:43,288 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) [2022-02-09 03:03:43,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-02-09 03:03:43,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:03:43,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:43,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:03:43,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:43,801 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:03:43,801 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 [2022-02-09 03:03:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:44,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:44,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:03:44,687 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 [2022-02-09 03:03:44,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:03:44,710 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 [2022-02-09 03:03:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:44,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702497796] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:44,745 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:44,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-02-09 03:03:44,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278417423] [2022-02-09 03:03:44,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:44,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-09 03:03:44,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:44,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-09 03:03:44,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2022-02-09 03:03:44,746 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) [2022-02-09 03:03:46,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:46,470 INFO L93 Difference]: Finished difference Result 8385 states and 36348 transitions. [2022-02-09 03:03:46,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-09 03:03:46,470 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 [2022-02-09 03:03:46,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:46,500 INFO L225 Difference]: With dead ends: 8385 [2022-02-09 03:03:46,500 INFO L226 Difference]: Without dead ends: 8374 [2022-02-09 03:03:46,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2022-02-09 03:03:46,500 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 278 mSDsluCounter, 2353 mSDsCounter, 0 mSdLazyCounter, 2634 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.1s IncrementalHoareTripleChecker+Time [2022-02-09 03:03:46,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 921 Invalid, 2894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2634 Invalid, 0 Unknown, 230 Unchecked, 1.1s Time] [2022-02-09 03:03:46,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8374 states. [2022-02-09 03:03:46,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8374 to 7658. [2022-02-09 03:03:46,657 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) [2022-02-09 03:03:46,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7658 states to 7658 states and 33346 transitions. [2022-02-09 03:03:46,685 INFO L78 Accepts]: Start accepts. Automaton has 7658 states and 33346 transitions. Word has length 33 [2022-02-09 03:03:46,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:46,685 INFO L470 AbstractCegarLoop]: Abstraction has 7658 states and 33346 transitions. [2022-02-09 03:03:46,685 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) [2022-02-09 03:03:46,685 INFO L276 IsEmpty]: Start isEmpty. Operand 7658 states and 33346 transitions. [2022-02-09 03:03:46,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:03:46,701 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:46,701 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] [2022-02-09 03:03:46,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-02-09 03:03:46,918 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 [2022-02-09 03:03:46,919 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:46,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:46,919 INFO L85 PathProgramCache]: Analyzing trace with hash 565140729, now seen corresponding path program 39 times [2022-02-09 03:03:46,919 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:46,919 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911306916] [2022-02-09 03:03:46,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:46,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:47,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:47,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:47,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911306916] [2022-02-09 03:03:47,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911306916] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:47,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398796210] [2022-02-09 03:03:47,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:03:47,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:47,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:47,130 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) [2022-02-09 03:03:47,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-02-09 03:03:47,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-09 03:03:47,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:47,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-09 03:03:47,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:47,649 INFO L353 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2022-02-09 03:03:47,649 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 [2022-02-09 03:03:47,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:47,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:48,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398796210] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:48,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:48,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-02-09 03:03:48,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608872502] [2022-02-09 03:03:48,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:48,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-09 03:03:48,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:48,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-09 03:03:48,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2022-02-09 03:03:48,341 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) [2022-02-09 03:03:52,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:52,680 INFO L93 Difference]: Finished difference Result 9540 states and 40443 transitions. [2022-02-09 03:03:52,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-09 03:03:52,680 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 [2022-02-09 03:03:52,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:52,708 INFO L225 Difference]: With dead ends: 9540 [2022-02-09 03:03:52,708 INFO L226 Difference]: Without dead ends: 9494 [2022-02-09 03:03:52,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=577, Invalid=6065, Unknown=0, NotChecked=0, Total=6642 [2022-02-09 03:03:52,709 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 1049 mSDsluCounter, 3266 mSDsCounter, 0 mSdLazyCounter, 4102 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 2.0s IncrementalHoareTripleChecker+Time [2022-02-09 03:03:52,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1049 Valid, 1221 Invalid, 4265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 4102 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-09 03:03:52,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9494 states. [2022-02-09 03:03:52,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9494 to 7670. [2022-02-09 03:03:52,870 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) [2022-02-09 03:03:52,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7670 states to 7670 states and 33458 transitions. [2022-02-09 03:03:52,899 INFO L78 Accepts]: Start accepts. Automaton has 7670 states and 33458 transitions. Word has length 33 [2022-02-09 03:03:52,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:52,900 INFO L470 AbstractCegarLoop]: Abstraction has 7670 states and 33458 transitions. [2022-02-09 03:03:52,900 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) [2022-02-09 03:03:52,900 INFO L276 IsEmpty]: Start isEmpty. Operand 7670 states and 33458 transitions. [2022-02-09 03:03:52,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:03:52,917 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:52,917 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] [2022-02-09 03:03:52,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-02-09 03:03:53,134 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 [2022-02-09 03:03:53,134 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:53,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:53,134 INFO L85 PathProgramCache]: Analyzing trace with hash 692613113, now seen corresponding path program 40 times [2022-02-09 03:03:53,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:53,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148828496] [2022-02-09 03:03:53,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:53,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:53,339 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:53,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148828496] [2022-02-09 03:03:53,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148828496] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:53,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057459972] [2022-02-09 03:03:53,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:03:53,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:53,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:53,340 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) [2022-02-09 03:03:53,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-02-09 03:03:53,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:03:53,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:53,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:03:53,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:53,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:03:53,851 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 [2022-02-09 03:03:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:53,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:54,274 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:03:54,274 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 [2022-02-09 03:03:54,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:03:54,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:03:54,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:03:54,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:03:54,348 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 [2022-02-09 03:03:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:54,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057459972] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:54,400 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:54,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:03:54,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509240300] [2022-02-09 03:03:54,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:54,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:03:54,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:54,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:03:54,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:03:54,401 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) [2022-02-09 03:03:56,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:03:56,448 INFO L93 Difference]: Finished difference Result 8309 states and 35933 transitions. [2022-02-09 03:03:56,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-09 03:03:56,448 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 [2022-02-09 03:03:56,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:03:56,479 INFO L225 Difference]: With dead ends: 8309 [2022-02-09 03:03:56,480 INFO L226 Difference]: Without dead ends: 8290 [2022-02-09 03:03:56,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=202, Invalid=2248, Unknown=0, NotChecked=0, Total=2450 [2022-02-09 03:03:56,480 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, 1.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:03:56,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 1073 Invalid, 3501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 3477 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-09 03:03:56,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2022-02-09 03:03:56,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 7729. [2022-02-09 03:03:56,635 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) [2022-02-09 03:03:56,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7729 states to 7729 states and 33694 transitions. [2022-02-09 03:03:56,667 INFO L78 Accepts]: Start accepts. Automaton has 7729 states and 33694 transitions. Word has length 33 [2022-02-09 03:03:56,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:03:56,668 INFO L470 AbstractCegarLoop]: Abstraction has 7729 states and 33694 transitions. [2022-02-09 03:03:56,668 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) [2022-02-09 03:03:56,668 INFO L276 IsEmpty]: Start isEmpty. Operand 7729 states and 33694 transitions. [2022-02-09 03:03:56,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:03:56,686 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:03:56,686 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] [2022-02-09 03:03:56,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-02-09 03:03:56,899 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 [2022-02-09 03:03:56,899 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:03:56,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:03:56,900 INFO L85 PathProgramCache]: Analyzing trace with hash 241367945, now seen corresponding path program 41 times [2022-02-09 03:03:56,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:03:56,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598006273] [2022-02-09 03:03:56,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:03:56,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:03:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:03:57,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:57,083 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:03:57,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598006273] [2022-02-09 03:03:57,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598006273] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:03:57,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599141600] [2022-02-09 03:03:57,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:03:57,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:03:57,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:03:57,088 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) [2022-02-09 03:03:57,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-02-09 03:03:57,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-09 03:03:57,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:03:57,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:03:57,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:03:57,604 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-02-09 03:03:57,604 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 63 [2022-02-09 03:03:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:57,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:03:58,113 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:03:58,114 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 [2022-02-09 03:03:58,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:03:58,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:03:58,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:03:58,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:03:58,179 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 [2022-02-09 03:03:58,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:03:58,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599141600] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:03:58,230 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:03:58,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:03:58,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793181016] [2022-02-09 03:03:58,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:03:58,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:03:58,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:03:58,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:03:58,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:03:58,231 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) [2022-02-09 03:04:00,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:04:00,361 INFO L93 Difference]: Finished difference Result 8675 states and 37341 transitions. [2022-02-09 03:04:00,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-09 03:04:00,361 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 [2022-02-09 03:04:00,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:04:00,386 INFO L225 Difference]: With dead ends: 8675 [2022-02-09 03:04:00,387 INFO L226 Difference]: Without dead ends: 8664 [2022-02-09 03:04:00,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=219, Invalid=2537, Unknown=0, NotChecked=0, Total=2756 [2022-02-09 03:04:00,387 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, 1.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:04:00,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 1339 Invalid, 3710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 3484 Invalid, 0 Unknown, 201 Unchecked, 1.5s Time] [2022-02-09 03:04:00,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8664 states. [2022-02-09 03:04:00,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8664 to 7829. [2022-02-09 03:04:00,532 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) [2022-02-09 03:04:00,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7829 states to 7829 states and 34107 transitions. [2022-02-09 03:04:00,560 INFO L78 Accepts]: Start accepts. Automaton has 7829 states and 34107 transitions. Word has length 33 [2022-02-09 03:04:00,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:04:00,560 INFO L470 AbstractCegarLoop]: Abstraction has 7829 states and 34107 transitions. [2022-02-09 03:04:00,560 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) [2022-02-09 03:04:00,560 INFO L276 IsEmpty]: Start isEmpty. Operand 7829 states and 34107 transitions. [2022-02-09 03:04:00,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:04:00,575 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:04:00,575 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] [2022-02-09 03:04:00,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-02-09 03:04:00,788 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 [2022-02-09 03:04:00,788 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:04:00,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:04:00,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1128871626, now seen corresponding path program 1 times [2022-02-09 03:04:00,790 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:04:00,790 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467736277] [2022-02-09 03:04:00,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:04:00,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:04:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:04:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:00,983 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:04:00,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467736277] [2022-02-09 03:04:00,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467736277] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:04:00,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45633564] [2022-02-09 03:04:00,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:04:00,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:04:00,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:04:00,984 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) [2022-02-09 03:04:00,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-02-09 03:04:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:04:01,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:04:01,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:04:01,584 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-02-09 03:04:01,584 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 [2022-02-09 03:04:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:01,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:04:01,946 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:04:01,947 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 [2022-02-09 03:04:01,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:04:01,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:04:01,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:01,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:01,993 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 [2022-02-09 03:04:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:02,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45633564] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:04:02,023 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:04:02,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:04:02,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497998950] [2022-02-09 03:04:02,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:04:02,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:04:02,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:04:02,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:04:02,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:04:02,023 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) [2022-02-09 03:04:03,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:04:03,539 INFO L93 Difference]: Finished difference Result 8629 states and 37111 transitions. [2022-02-09 03:04:03,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-09 03:04:03,540 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 [2022-02-09 03:04:03,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:04:03,571 INFO L225 Difference]: With dead ends: 8629 [2022-02-09 03:04:03,571 INFO L226 Difference]: Without dead ends: 8616 [2022-02-09 03:04:03,572 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 [2022-02-09 03:04:03,572 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 475 mSDsluCounter, 2543 mSDsCounter, 0 mSdLazyCounter, 3137 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-02-09 03:04:03,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 1064 Invalid, 3194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 3137 Invalid, 0 Unknown, 24 Unchecked, 0.9s Time] [2022-02-09 03:04:03,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8616 states. [2022-02-09 03:04:03,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8616 to 7857. [2022-02-09 03:04:03,731 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) [2022-02-09 03:04:03,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7857 states to 7857 states and 34215 transitions. [2022-02-09 03:04:03,757 INFO L78 Accepts]: Start accepts. Automaton has 7857 states and 34215 transitions. Word has length 33 [2022-02-09 03:04:03,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:04:03,757 INFO L470 AbstractCegarLoop]: Abstraction has 7857 states and 34215 transitions. [2022-02-09 03:04:03,757 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) [2022-02-09 03:04:03,757 INFO L276 IsEmpty]: Start isEmpty. Operand 7857 states and 34215 transitions. [2022-02-09 03:04:03,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:04:03,773 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:04:03,773 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] [2022-02-09 03:04:03,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-02-09 03:04:03,987 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 [2022-02-09 03:04:03,987 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:04:03,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:04:03,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1984178280, now seen corresponding path program 1 times [2022-02-09 03:04:03,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:04:03,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755777202] [2022-02-09 03:04:03,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:04:03,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:04:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:04:04,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:04,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:04:04,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755777202] [2022-02-09 03:04:04,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755777202] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:04:04,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40478549] [2022-02-09 03:04:04,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:04:04,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:04:04,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:04:04,249 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) [2022-02-09 03:04:04,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-02-09 03:04:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:04:04,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:04:04,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:04:04,767 INFO L353 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2022-02-09 03:04:04,767 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 63 [2022-02-09 03:04:04,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:04,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:04:05,214 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:04:05,214 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 [2022-02-09 03:04:05,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:04:05,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:04:05,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:05,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:05,281 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 [2022-02-09 03:04:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:05,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40478549] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:04:05,336 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:04:05,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:04:05,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515437675] [2022-02-09 03:04:05,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:04:05,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:04:05,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:04:05,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:04:05,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:04:05,337 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) [2022-02-09 03:04:07,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:04:07,614 INFO L93 Difference]: Finished difference Result 8645 states and 37144 transitions. [2022-02-09 03:04:07,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-09 03:04:07,614 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 [2022-02-09 03:04:07,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:04:07,640 INFO L225 Difference]: With dead ends: 8645 [2022-02-09 03:04:07,640 INFO L226 Difference]: Without dead ends: 8632 [2022-02-09 03:04:07,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=243, Invalid=2619, Unknown=0, NotChecked=0, Total=2862 [2022-02-09 03:04:07,641 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 407 mSDsluCounter, 2942 mSDsCounter, 0 mSdLazyCounter, 3538 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:04:07,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 1234 Invalid, 3655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3538 Invalid, 0 Unknown, 87 Unchecked, 1.5s Time] [2022-02-09 03:04:07,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8632 states. [2022-02-09 03:04:07,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8632 to 7849. [2022-02-09 03:04:07,784 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) [2022-02-09 03:04:07,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7849 states to 7849 states and 34191 transitions. [2022-02-09 03:04:07,812 INFO L78 Accepts]: Start accepts. Automaton has 7849 states and 34191 transitions. Word has length 33 [2022-02-09 03:04:07,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:04:07,812 INFO L470 AbstractCegarLoop]: Abstraction has 7849 states and 34191 transitions. [2022-02-09 03:04:07,812 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) [2022-02-09 03:04:07,812 INFO L276 IsEmpty]: Start isEmpty. Operand 7849 states and 34191 transitions. [2022-02-09 03:04:07,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:04:07,828 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:04:07,828 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] [2022-02-09 03:04:07,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-02-09 03:04:08,044 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 [2022-02-09 03:04:08,044 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:04:08,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:04:08,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1423285335, now seen corresponding path program 1 times [2022-02-09 03:04:08,045 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:04:08,045 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690657852] [2022-02-09 03:04:08,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:04:08,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:04:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:04:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:08,255 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:04:08,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690657852] [2022-02-09 03:04:08,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690657852] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:04:08,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80640410] [2022-02-09 03:04:08,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:04:08,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:04:08,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:04:08,256 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) [2022-02-09 03:04:08,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-02-09 03:04:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:04:08,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:04:08,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:04:08,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:08,739 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 [2022-02-09 03:04:08,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:08,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:04:09,232 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:04:09,232 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 [2022-02-09 03:04:09,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:04:09,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:04:09,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:09,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:09,304 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 [2022-02-09 03:04:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:09,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80640410] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:04:09,345 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:04:09,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:04:09,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639968550] [2022-02-09 03:04:09,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:04:09,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:04:09,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:04:09,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:04:09,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:04:09,346 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) [2022-02-09 03:04:11,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:04:11,833 INFO L93 Difference]: Finished difference Result 8653 states and 37168 transitions. [2022-02-09 03:04:11,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-09 03:04:11,833 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 [2022-02-09 03:04:11,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:04:11,859 INFO L225 Difference]: With dead ends: 8653 [2022-02-09 03:04:11,859 INFO L226 Difference]: Without dead ends: 8611 [2022-02-09 03:04:11,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=255, Invalid=2825, Unknown=0, NotChecked=0, Total=3080 [2022-02-09 03:04:11,860 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 435 mSDsluCounter, 3318 mSDsCounter, 0 mSdLazyCounter, 4272 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:04:11,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 1325 Invalid, 4303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 4272 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-09 03:04:11,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8611 states. [2022-02-09 03:04:11,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8611 to 7789. [2022-02-09 03:04:12,001 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) [2022-02-09 03:04:12,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7789 states to 7789 states and 33985 transitions. [2022-02-09 03:04:12,028 INFO L78 Accepts]: Start accepts. Automaton has 7789 states and 33985 transitions. Word has length 33 [2022-02-09 03:04:12,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:04:12,028 INFO L470 AbstractCegarLoop]: Abstraction has 7789 states and 33985 transitions. [2022-02-09 03:04:12,028 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) [2022-02-09 03:04:12,028 INFO L276 IsEmpty]: Start isEmpty. Operand 7789 states and 33985 transitions. [2022-02-09 03:04:12,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:04:12,045 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:04:12,045 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] [2022-02-09 03:04:12,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-02-09 03:04:12,261 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 [2022-02-09 03:04:12,261 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:04:12,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:04:12,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1341675749, now seen corresponding path program 42 times [2022-02-09 03:04:12,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:04:12,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403964711] [2022-02-09 03:04:12,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:04:12,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:04:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:04:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:12,591 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:04:12,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403964711] [2022-02-09 03:04:12,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403964711] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:04:12,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273356571] [2022-02-09 03:04:12,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:04:12,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:04:12,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:04:12,594 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) [2022-02-09 03:04:12,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-02-09 03:04:12,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-09 03:04:12,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:04:12,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:04:12,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:04:12,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:12,973 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-02-09 03:04:12,974 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 [2022-02-09 03:04:13,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:13,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:04:13,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:13,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273356571] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:04:13,569 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:04:13,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-09 03:04:13,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822892530] [2022-02-09 03:04:13,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:04:13,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-09 03:04:13,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:04:13,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-09 03:04:13,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1086, Unknown=0, NotChecked=0, Total=1190 [2022-02-09 03:04:13,570 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) [2022-02-09 03:04:18,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:04:18,197 INFO L93 Difference]: Finished difference Result 9429 states and 39923 transitions. [2022-02-09 03:04:18,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-09 03:04:18,198 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 [2022-02-09 03:04:18,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:04:18,226 INFO L225 Difference]: With dead ends: 9429 [2022-02-09 03:04:18,226 INFO L226 Difference]: Without dead ends: 9391 [2022-02-09 03:04:18,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=630, Invalid=6510, Unknown=0, NotChecked=0, Total=7140 [2022-02-09 03:04:18,227 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 1010 mSDsluCounter, 3430 mSDsCounter, 0 mSdLazyCounter, 4241 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-02-09 03:04:18,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1010 Valid, 1371 Invalid, 4406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 4241 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-09 03:04:18,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9391 states. [2022-02-09 03:04:18,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9391 to 7804. [2022-02-09 03:04:18,376 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) [2022-02-09 03:04:18,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7804 states to 7804 states and 34037 transitions. [2022-02-09 03:04:18,402 INFO L78 Accepts]: Start accepts. Automaton has 7804 states and 34037 transitions. Word has length 33 [2022-02-09 03:04:18,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:04:18,402 INFO L470 AbstractCegarLoop]: Abstraction has 7804 states and 34037 transitions. [2022-02-09 03:04:18,402 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) [2022-02-09 03:04:18,402 INFO L276 IsEmpty]: Start isEmpty. Operand 7804 states and 34037 transitions. [2022-02-09 03:04:18,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:04:18,418 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:04:18,418 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] [2022-02-09 03:04:18,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-02-09 03:04:18,631 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 [2022-02-09 03:04:18,631 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:04:18,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:04:18,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1905273173, now seen corresponding path program 43 times [2022-02-09 03:04:18,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:04:18,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801696516] [2022-02-09 03:04:18,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:04:18,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:04:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:04:18,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:18,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:04:18,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801696516] [2022-02-09 03:04:18,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801696516] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:04:18,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031087218] [2022-02-09 03:04:18,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:04:18,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:04:18,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:04:18,785 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) [2022-02-09 03:04:18,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-02-09 03:04:18,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:04:18,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:04:18,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:04:19,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:19,085 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 [2022-02-09 03:04:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:19,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:04:19,422 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:04:19,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-02-09 03:04:19,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:04:19,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:04:19,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:19,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:19,470 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 [2022-02-09 03:04:19,501 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:19,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031087218] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:04:19,501 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:04:19,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:04:19,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172540648] [2022-02-09 03:04:19,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:04:19,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:04:19,502 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:04:19,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:04:19,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:04:19,502 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) [2022-02-09 03:04:21,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:04:21,918 INFO L93 Difference]: Finished difference Result 10276 states and 43727 transitions. [2022-02-09 03:04:21,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-09 03:04:21,919 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 [2022-02-09 03:04:21,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:04:21,950 INFO L225 Difference]: With dead ends: 10276 [2022-02-09 03:04:21,950 INFO L226 Difference]: Without dead ends: 10227 [2022-02-09 03:04:21,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=418, Invalid=4694, Unknown=0, NotChecked=0, Total=5112 [2022-02-09 03:04:21,951 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 811 mSDsluCounter, 3595 mSDsCounter, 0 mSdLazyCounter, 4202 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:04:21,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [811 Valid, 1362 Invalid, 4759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 4202 Invalid, 0 Unknown, 472 Unchecked, 1.4s Time] [2022-02-09 03:04:21,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10227 states. [2022-02-09 03:04:22,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10227 to 7888. [2022-02-09 03:04:22,122 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) [2022-02-09 03:04:22,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7888 states to 7888 states and 34412 transitions. [2022-02-09 03:04:22,148 INFO L78 Accepts]: Start accepts. Automaton has 7888 states and 34412 transitions. Word has length 33 [2022-02-09 03:04:22,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:04:22,148 INFO L470 AbstractCegarLoop]: Abstraction has 7888 states and 34412 transitions. [2022-02-09 03:04:22,148 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) [2022-02-09 03:04:22,148 INFO L276 IsEmpty]: Start isEmpty. Operand 7888 states and 34412 transitions. [2022-02-09 03:04:22,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:04:22,164 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:04:22,164 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] [2022-02-09 03:04:22,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-02-09 03:04:22,371 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 [2022-02-09 03:04:22,371 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:04:22,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:04:22,372 INFO L85 PathProgramCache]: Analyzing trace with hash 2018469117, now seen corresponding path program 44 times [2022-02-09 03:04:22,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:04:22,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304678270] [2022-02-09 03:04:22,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:04:22,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:04:22,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:04:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:22,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:04:22,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304678270] [2022-02-09 03:04:22,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304678270] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:04:22,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560997360] [2022-02-09 03:04:22,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:04:22,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:04:22,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:04:22,600 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) [2022-02-09 03:04:22,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-02-09 03:04:22,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:04:22,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:04:22,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:04:22,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:04:22,998 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:04:22,998 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 [2022-02-09 03:04:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:23,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:04:23,555 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:04:23,556 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 [2022-02-09 03:04:23,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:23,568 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 [2022-02-09 03:04:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:23,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560997360] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:04:23,621 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:04:23,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-02-09 03:04:23,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899803508] [2022-02-09 03:04:23,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:04:23,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-09 03:04:23,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:04:23,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-09 03:04:23,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-02-09 03:04:23,622 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) [2022-02-09 03:04:24,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:04:24,732 INFO L93 Difference]: Finished difference Result 8300 states and 35943 transitions. [2022-02-09 03:04:24,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-09 03:04:24,732 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 [2022-02-09 03:04:24,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:04:24,756 INFO L225 Difference]: With dead ends: 8300 [2022-02-09 03:04:24,757 INFO L226 Difference]: Without dead ends: 8289 [2022-02-09 03:04:24,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=203, Invalid=1603, Unknown=0, NotChecked=0, Total=1806 [2022-02-09 03:04:24,757 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 343 mSDsluCounter, 1705 mSDsCounter, 0 mSdLazyCounter, 2173 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:04:24,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 678 Invalid, 2266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2173 Invalid, 0 Unknown, 54 Unchecked, 0.7s Time] [2022-02-09 03:04:24,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8289 states. [2022-02-09 03:04:24,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8289 to 7894. [2022-02-09 03:04:24,919 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) [2022-02-09 03:04:24,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7894 states to 7894 states and 34431 transitions. [2022-02-09 03:04:24,949 INFO L78 Accepts]: Start accepts. Automaton has 7894 states and 34431 transitions. Word has length 33 [2022-02-09 03:04:24,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:04:24,949 INFO L470 AbstractCegarLoop]: Abstraction has 7894 states and 34431 transitions. [2022-02-09 03:04:24,949 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) [2022-02-09 03:04:24,949 INFO L276 IsEmpty]: Start isEmpty. Operand 7894 states and 34431 transitions. [2022-02-09 03:04:24,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:04:24,968 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:04:24,968 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] [2022-02-09 03:04:24,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-02-09 03:04:25,184 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 [2022-02-09 03:04:25,184 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:04:25,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:04:25,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1821955612, now seen corresponding path program 2 times [2022-02-09 03:04:25,185 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:04:25,185 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769548424] [2022-02-09 03:04:25,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:04:25,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:04:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:04:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:25,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:04:25,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769548424] [2022-02-09 03:04:25,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769548424] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:04:25,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764325190] [2022-02-09 03:04:25,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:04:25,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:04:25,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:04:25,331 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) [2022-02-09 03:04:25,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-02-09 03:04:25,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:04:25,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:04:25,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:04:25,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:04:25,640 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:04:25,640 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 [2022-02-09 03:04:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:25,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:04:26,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:04:26,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-02-09 03:04:26,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:26,067 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-02-09 03:04:26,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:26,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764325190] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:04:26,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:04:26,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-02-09 03:04:26,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486980026] [2022-02-09 03:04:26,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:04:26,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-09 03:04:26,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:04:26,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-09 03:04:26,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-02-09 03:04:26,102 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) [2022-02-09 03:04:27,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:04:27,233 INFO L93 Difference]: Finished difference Result 8300 states and 35942 transitions. [2022-02-09 03:04:27,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-09 03:04:27,234 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 [2022-02-09 03:04:27,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:04:27,266 INFO L225 Difference]: With dead ends: 8300 [2022-02-09 03:04:27,266 INFO L226 Difference]: Without dead ends: 8287 [2022-02-09 03:04:27,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2022-02-09 03:04:27,267 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 272 mSDsluCounter, 2328 mSDsCounter, 0 mSdLazyCounter, 2787 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-02-09 03:04:27,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 892 Invalid, 3096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2787 Invalid, 0 Unknown, 279 Unchecked, 0.8s Time] [2022-02-09 03:04:27,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8287 states. [2022-02-09 03:04:27,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8287 to 7881. [2022-02-09 03:04:27,406 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) [2022-02-09 03:04:27,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7881 states to 7881 states and 34390 transitions. [2022-02-09 03:04:27,433 INFO L78 Accepts]: Start accepts. Automaton has 7881 states and 34390 transitions. Word has length 33 [2022-02-09 03:04:27,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:04:27,433 INFO L470 AbstractCegarLoop]: Abstraction has 7881 states and 34390 transitions. [2022-02-09 03:04:27,433 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) [2022-02-09 03:04:27,433 INFO L276 IsEmpty]: Start isEmpty. Operand 7881 states and 34390 transitions. [2022-02-09 03:04:27,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:04:27,448 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:04:27,449 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] [2022-02-09 03:04:27,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-02-09 03:04:27,664 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 [2022-02-09 03:04:27,664 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:04:27,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:04:27,665 INFO L85 PathProgramCache]: Analyzing trace with hash -300920175, now seen corresponding path program 45 times [2022-02-09 03:04:27,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:04:27,665 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791364352] [2022-02-09 03:04:27,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:04:27,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:04:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:04:27,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:27,872 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:04:27,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791364352] [2022-02-09 03:04:27,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791364352] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:04:27,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408089270] [2022-02-09 03:04:27,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:04:27,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:04:27,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:04:27,874 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) [2022-02-09 03:04:27,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-02-09 03:04:27,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-09 03:04:27,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:04:27,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-09 03:04:27,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:04:28,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:28,257 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-02-09 03:04:28,258 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 55 [2022-02-09 03:04:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:28,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:04:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:28,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408089270] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:04:28,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:04:28,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-09 03:04:28,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980025985] [2022-02-09 03:04:28,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:04:28,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-09 03:04:28,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:04:28,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-09 03:04:28,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2022-02-09 03:04:28,753 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) [2022-02-09 03:04:33,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:04:33,204 INFO L93 Difference]: Finished difference Result 10866 states and 45556 transitions. [2022-02-09 03:04:33,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-09 03:04:33,205 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 [2022-02-09 03:04:33,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:04:33,238 INFO L225 Difference]: With dead ends: 10866 [2022-02-09 03:04:33,238 INFO L226 Difference]: Without dead ends: 10828 [2022-02-09 03:04:33,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2099 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=753, Invalid=8177, Unknown=0, NotChecked=0, Total=8930 [2022-02-09 03:04:33,240 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 1115 mSDsluCounter, 4261 mSDsCounter, 0 mSdLazyCounter, 5170 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-02-09 03:04:33,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1115 Valid, 1682 Invalid, 5356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 5170 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-09 03:04:33,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10828 states. [2022-02-09 03:04:33,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10828 to 7959. [2022-02-09 03:04:33,458 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) [2022-02-09 03:04:33,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7959 states to 7959 states and 34770 transitions. [2022-02-09 03:04:33,489 INFO L78 Accepts]: Start accepts. Automaton has 7959 states and 34770 transitions. Word has length 33 [2022-02-09 03:04:33,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:04:33,489 INFO L470 AbstractCegarLoop]: Abstraction has 7959 states and 34770 transitions. [2022-02-09 03:04:33,489 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) [2022-02-09 03:04:33,489 INFO L276 IsEmpty]: Start isEmpty. Operand 7959 states and 34770 transitions. [2022-02-09 03:04:33,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:04:33,506 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:04:33,506 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] [2022-02-09 03:04:33,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-02-09 03:04:33,719 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 [2022-02-09 03:04:33,719 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:04:33,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:04:33,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1235742605, now seen corresponding path program 46 times [2022-02-09 03:04:33,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:04:33,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490900385] [2022-02-09 03:04:33,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:04:33,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:04:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:04:33,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:33,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:04:33,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490900385] [2022-02-09 03:04:33,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490900385] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:04:33,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026872101] [2022-02-09 03:04:33,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:04:33,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:04:33,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:04:33,905 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) [2022-02-09 03:04:33,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-02-09 03:04:33,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:04:33,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:04:33,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:04:33,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:04:34,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:34,307 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 [2022-02-09 03:04:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:34,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:04:34,731 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:04:34,731 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 [2022-02-09 03:04:34,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:04:34,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:04:34,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:34,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:34,804 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 [2022-02-09 03:04:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:34,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026872101] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:04:34,863 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:04:34,863 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-09 03:04:34,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262148268] [2022-02-09 03:04:34,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:04:34,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:04:34,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:04:34,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:04:34,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:04:34,864 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) [2022-02-09 03:04:37,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:04:37,150 INFO L93 Difference]: Finished difference Result 9194 states and 39385 transitions. [2022-02-09 03:04:37,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-09 03:04:37,150 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 [2022-02-09 03:04:37,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:04:37,178 INFO L225 Difference]: With dead ends: 9194 [2022-02-09 03:04:37,178 INFO L226 Difference]: Without dead ends: 9166 [2022-02-09 03:04:37,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=211, Invalid=2239, Unknown=0, NotChecked=0, Total=2450 [2022-02-09 03:04:37,179 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 515 mSDsluCounter, 3073 mSDsCounter, 0 mSdLazyCounter, 4005 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:04:37,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 1257 Invalid, 4130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 4005 Invalid, 0 Unknown, 81 Unchecked, 1.7s Time] [2022-02-09 03:04:37,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9166 states. [2022-02-09 03:04:37,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9166 to 8022. [2022-02-09 03:04:37,333 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) [2022-02-09 03:04:37,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8022 states to 8022 states and 35010 transitions. [2022-02-09 03:04:37,455 INFO L78 Accepts]: Start accepts. Automaton has 8022 states and 35010 transitions. Word has length 33 [2022-02-09 03:04:37,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:04:37,455 INFO L470 AbstractCegarLoop]: Abstraction has 8022 states and 35010 transitions. [2022-02-09 03:04:37,455 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) [2022-02-09 03:04:37,455 INFO L276 IsEmpty]: Start isEmpty. Operand 8022 states and 35010 transitions. [2022-02-09 03:04:37,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:04:37,473 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:04:37,473 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] [2022-02-09 03:04:37,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-02-09 03:04:37,688 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 [2022-02-09 03:04:37,689 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:04:37,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:04:37,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1432256110, now seen corresponding path program 3 times [2022-02-09 03:04:37,689 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:04:37,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703729245] [2022-02-09 03:04:37,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:04:37,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:04:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:04:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:37,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:04:37,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703729245] [2022-02-09 03:04:37,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703729245] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:04:37,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445226733] [2022-02-09 03:04:37,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:04:37,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:04:37,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:04:37,875 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) [2022-02-09 03:04:37,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-02-09 03:04:37,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-09 03:04:37,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:04:37,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-09 03:04:37,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:04:38,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:38,335 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-09 03:04:38,335 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 [2022-02-09 03:04:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:38,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:04:38,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:38,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445226733] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:04:38,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:04:38,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-02-09 03:04:38,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116773092] [2022-02-09 03:04:38,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:04:38,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-09 03:04:38,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:04:38,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-09 03:04:38,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2022-02-09 03:04:38,899 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) [2022-02-09 03:04:43,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:04:43,141 INFO L93 Difference]: Finished difference Result 10657 states and 44581 transitions. [2022-02-09 03:04:43,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-09 03:04:43,141 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 [2022-02-09 03:04:43,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:04:43,173 INFO L225 Difference]: With dead ends: 10657 [2022-02-09 03:04:43,173 INFO L226 Difference]: Without dead ends: 10631 [2022-02-09 03:04:43,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1745 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=672, Invalid=6638, Unknown=0, NotChecked=0, Total=7310 [2022-02-09 03:04:43,175 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 1118 mSDsluCounter, 3640 mSDsCounter, 0 mSdLazyCounter, 4572 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-02-09 03:04:43,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1118 Valid, 1422 Invalid, 4758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 4572 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-09 03:04:43,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10631 states. [2022-02-09 03:04:43,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10631 to 7990. [2022-02-09 03:04:43,384 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) [2022-02-09 03:04:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7990 states to 7990 states and 34873 transitions. [2022-02-09 03:04:43,411 INFO L78 Accepts]: Start accepts. Automaton has 7990 states and 34873 transitions. Word has length 33 [2022-02-09 03:04:43,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:04:43,411 INFO L470 AbstractCegarLoop]: Abstraction has 7990 states and 34873 transitions. [2022-02-09 03:04:43,411 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) [2022-02-09 03:04:43,411 INFO L276 IsEmpty]: Start isEmpty. Operand 7990 states and 34873 transitions. [2022-02-09 03:04:43,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:04:43,427 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:04:43,428 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] [2022-02-09 03:04:43,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-02-09 03:04:43,644 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 [2022-02-09 03:04:43,644 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:04:43,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:04:43,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1876450095, now seen corresponding path program 47 times [2022-02-09 03:04:43,645 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:04:43,645 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774816610] [2022-02-09 03:04:43,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:04:43,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:04:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:04:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:43,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:04:43,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774816610] [2022-02-09 03:04:43,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774816610] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:04:43,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964164155] [2022-02-09 03:04:43,826 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:04:43,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:04:43,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:04:43,827 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) [2022-02-09 03:04:43,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-02-09 03:04:43,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-09 03:04:43,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:04:43,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:04:43,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:04:44,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:44,232 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 [2022-02-09 03:04:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:44,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:04:44,668 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:04:44,669 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 [2022-02-09 03:04:44,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:04:44,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:04:44,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:44,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:44,739 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 [2022-02-09 03:04:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:44,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964164155] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:04:44,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:04:44,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:04:44,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670265696] [2022-02-09 03:04:44,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:04:44,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:04:44,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:04:44,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:04:44,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:04:44,790 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) [2022-02-09 03:04:47,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:04:47,358 INFO L93 Difference]: Finished difference Result 9092 states and 39166 transitions. [2022-02-09 03:04:47,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-09 03:04:47,359 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 [2022-02-09 03:04:47,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:04:47,386 INFO L225 Difference]: With dead ends: 9092 [2022-02-09 03:04:47,386 INFO L226 Difference]: Without dead ends: 9054 [2022-02-09 03:04:47,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=307, Invalid=2999, Unknown=0, NotChecked=0, Total=3306 [2022-02-09 03:04:47,387 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 565 mSDsluCounter, 3104 mSDsCounter, 0 mSdLazyCounter, 4065 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:04:47,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 1223 Invalid, 4142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 4065 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-09 03:04:47,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9054 states. [2022-02-09 03:04:47,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9054 to 8053. [2022-02-09 03:04:47,617 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) [2022-02-09 03:04:47,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8053 states to 8053 states and 35180 transitions. [2022-02-09 03:04:47,652 INFO L78 Accepts]: Start accepts. Automaton has 8053 states and 35180 transitions. Word has length 33 [2022-02-09 03:04:47,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:04:47,653 INFO L470 AbstractCegarLoop]: Abstraction has 8053 states and 35180 transitions. [2022-02-09 03:04:47,653 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) [2022-02-09 03:04:47,653 INFO L276 IsEmpty]: Start isEmpty. Operand 8053 states and 35180 transitions. [2022-02-09 03:04:47,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:04:47,674 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:04:47,674 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] [2022-02-09 03:04:47,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-02-09 03:04:47,879 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 [2022-02-09 03:04:47,879 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:04:47,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:04:47,880 INFO L85 PathProgramCache]: Analyzing trace with hash 745114160, now seen corresponding path program 4 times [2022-02-09 03:04:47,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:04:47,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538216665] [2022-02-09 03:04:47,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:04:47,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:04:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:04:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:48,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:04:48,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538216665] [2022-02-09 03:04:48,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538216665] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:04:48,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313357355] [2022-02-09 03:04:48,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:04:48,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:04:48,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:04:48,093 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) [2022-02-09 03:04:48,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-02-09 03:04:48,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:04:48,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:04:48,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:04:48,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:04:48,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:48,432 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 [2022-02-09 03:04:48,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:48,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:04:48,820 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:04:48,820 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 [2022-02-09 03:04:48,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:04:48,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:04:48,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:48,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:48,884 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 [2022-02-09 03:04:48,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:48,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313357355] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:04:48,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:04:48,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-09 03:04:48,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901076170] [2022-02-09 03:04:48,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:04:48,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:04:48,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:04:48,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:04:48,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:04:48,926 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) [2022-02-09 03:04:51,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:04:51,396 INFO L93 Difference]: Finished difference Result 9208 states and 39560 transitions. [2022-02-09 03:04:51,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-09 03:04:51,396 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 [2022-02-09 03:04:51,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:04:51,424 INFO L225 Difference]: With dead ends: 9208 [2022-02-09 03:04:51,425 INFO L226 Difference]: Without dead ends: 9160 [2022-02-09 03:04:51,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=277, Invalid=2693, Unknown=0, NotChecked=0, Total=2970 [2022-02-09 03:04:51,425 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 616 mSDsluCounter, 3046 mSDsCounter, 0 mSdLazyCounter, 4076 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:04:51,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 1184 Invalid, 4157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 4076 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-09 03:04:51,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9160 states. [2022-02-09 03:04:51,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9160 to 7980. [2022-02-09 03:04:51,572 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) [2022-02-09 03:04:51,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7980 states to 7980 states and 34902 transitions. [2022-02-09 03:04:51,599 INFO L78 Accepts]: Start accepts. Automaton has 7980 states and 34902 transitions. Word has length 33 [2022-02-09 03:04:51,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:04:51,600 INFO L470 AbstractCegarLoop]: Abstraction has 7980 states and 34902 transitions. [2022-02-09 03:04:51,600 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) [2022-02-09 03:04:51,600 INFO L276 IsEmpty]: Start isEmpty. Operand 7980 states and 34902 transitions. [2022-02-09 03:04:51,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:04:51,618 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:04:51,618 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] [2022-02-09 03:04:51,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-02-09 03:04:51,831 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 [2022-02-09 03:04:51,831 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:04:51,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:04:51,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1631151711, now seen corresponding path program 48 times [2022-02-09 03:04:51,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:04:51,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422671638] [2022-02-09 03:04:51,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:04:51,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:04:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:04:52,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:52,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:04:52,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422671638] [2022-02-09 03:04:52,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422671638] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:04:52,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450081313] [2022-02-09 03:04:52,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:04:52,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:04:52,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:04:52,132 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) [2022-02-09 03:04:52,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-02-09 03:04:52,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-09 03:04:52,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:04:52,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-09 03:04:52,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:04:52,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:52,552 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-09 03:04:52,552 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 [2022-02-09 03:04:52,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:52,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:04:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:53,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450081313] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:04:53,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:04:53,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 33 [2022-02-09 03:04:53,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148373034] [2022-02-09 03:04:53,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:04:53,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-09 03:04:53,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:04:53,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-09 03:04:53,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2022-02-09 03:04:53,066 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) [2022-02-09 03:04:57,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:04:57,731 INFO L93 Difference]: Finished difference Result 11257 states and 48216 transitions. [2022-02-09 03:04:57,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-09 03:04:57,732 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 [2022-02-09 03:04:57,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:04:57,766 INFO L225 Difference]: With dead ends: 11257 [2022-02-09 03:04:57,766 INFO L226 Difference]: Without dead ends: 11187 [2022-02-09 03:04:57,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2920 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1015, Invalid=9085, Unknown=0, NotChecked=0, Total=10100 [2022-02-09 03:04:57,766 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 1185 mSDsluCounter, 4530 mSDsCounter, 0 mSdLazyCounter, 6253 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.2s IncrementalHoareTripleChecker+Time [2022-02-09 03:04:57,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1185 Valid, 1800 Invalid, 6493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 6253 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-09 03:04:57,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11187 states. [2022-02-09 03:04:57,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11187 to 8331. [2022-02-09 03:04:57,946 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) [2022-02-09 03:04:57,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8331 states to 8331 states and 36639 transitions. [2022-02-09 03:04:57,974 INFO L78 Accepts]: Start accepts. Automaton has 8331 states and 36639 transitions. Word has length 33 [2022-02-09 03:04:57,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:04:57,974 INFO L470 AbstractCegarLoop]: Abstraction has 8331 states and 36639 transitions. [2022-02-09 03:04:57,974 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) [2022-02-09 03:04:57,974 INFO L276 IsEmpty]: Start isEmpty. Operand 8331 states and 36639 transitions. [2022-02-09 03:04:57,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:04:57,991 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:04:57,991 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] [2022-02-09 03:04:58,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-02-09 03:04:58,207 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 [2022-02-09 03:04:58,207 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:04:58,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:04:58,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1360542979, now seen corresponding path program 49 times [2022-02-09 03:04:58,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:04:58,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524541553] [2022-02-09 03:04:58,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:04:58,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:04:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:04:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:58,437 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:04:58,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524541553] [2022-02-09 03:04:58,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524541553] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:04:58,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721023101] [2022-02-09 03:04:58,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:04:58,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:04:58,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:04:58,438 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) [2022-02-09 03:04:58,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-02-09 03:04:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:04:58,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:04:58,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:04:58,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:58,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-02-09 03:04:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:58,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:04:59,107 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:04:59,108 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 [2022-02-09 03:04:59,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:04:59,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:04:59,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:59,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:04:59,193 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 [2022-02-09 03:04:59,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:04:59,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721023101] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:04:59,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:04:59,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-09 03:04:59,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587638379] [2022-02-09 03:04:59,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:04:59,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:04:59,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:04:59,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:04:59,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:04:59,238 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) [2022-02-09 03:05:02,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:05:02,104 INFO L93 Difference]: Finished difference Result 10514 states and 45131 transitions. [2022-02-09 03:05:02,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-09 03:05:02,104 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 [2022-02-09 03:05:02,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:05:02,148 INFO L225 Difference]: With dead ends: 10514 [2022-02-09 03:05:02,149 INFO L226 Difference]: Without dead ends: 10463 [2022-02-09 03:05:02,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=464, Invalid=3318, Unknown=0, NotChecked=0, Total=3782 [2022-02-09 03:05:02,150 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 555 mSDsluCounter, 3606 mSDsCounter, 0 mSdLazyCounter, 4672 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-02-09 03:05:02,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [555 Valid, 1433 Invalid, 4756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 4672 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-09 03:05:02,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10463 states. [2022-02-09 03:05:02,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10463 to 8720. [2022-02-09 03:05:02,448 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) [2022-02-09 03:05:02,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8720 states to 8720 states and 38443 transitions. [2022-02-09 03:05:02,494 INFO L78 Accepts]: Start accepts. Automaton has 8720 states and 38443 transitions. Word has length 33 [2022-02-09 03:05:02,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:05:02,495 INFO L470 AbstractCegarLoop]: Abstraction has 8720 states and 38443 transitions. [2022-02-09 03:05:02,495 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) [2022-02-09 03:05:02,495 INFO L276 IsEmpty]: Start isEmpty. Operand 8720 states and 38443 transitions. [2022-02-09 03:05:02,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:05:02,517 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:05:02,517 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] [2022-02-09 03:05:02,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-02-09 03:05:02,733 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 [2022-02-09 03:05:02,733 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:05:02,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:05:02,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1413929499, now seen corresponding path program 50 times [2022-02-09 03:05:02,734 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:05:02,734 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446035657] [2022-02-09 03:05:02,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:05:02,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:05:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:05:02,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:02,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:05:02,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446035657] [2022-02-09 03:05:02,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446035657] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:05:02,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986318375] [2022-02-09 03:05:02,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:05:02,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:05:02,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:05:02,941 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) [2022-02-09 03:05:02,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-02-09 03:05:02,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:05:02,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:05:02,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:05:02,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:05:03,181 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:05:03,182 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 [2022-02-09 03:05:03,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:03,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:05:03,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:05:03,836 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 [2022-02-09 03:05:03,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:05:03,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-02-09 03:05:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:03,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986318375] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:05:03,882 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:05:03,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-09 03:05:03,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354496810] [2022-02-09 03:05:03,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:05:03,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-09 03:05:03,882 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:05:03,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-09 03:05:03,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1065, Unknown=0, NotChecked=0, Total=1190 [2022-02-09 03:05:03,883 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) [2022-02-09 03:05:06,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:05:06,780 INFO L93 Difference]: Finished difference Result 10869 states and 46150 transitions. [2022-02-09 03:05:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-09 03:05:06,780 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 [2022-02-09 03:05:06,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:05:06,819 INFO L225 Difference]: With dead ends: 10869 [2022-02-09 03:05:06,819 INFO L226 Difference]: Without dead ends: 10839 [2022-02-09 03:05:06,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=572, Invalid=4258, Unknown=0, NotChecked=0, Total=4830 [2022-02-09 03:05:06,820 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1075 mSDsluCounter, 3202 mSDsCounter, 0 mSdLazyCounter, 3926 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:05:06,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1075 Valid, 1284 Invalid, 4499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 3926 Invalid, 0 Unknown, 418 Unchecked, 1.4s Time] [2022-02-09 03:05:06,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10839 states. [2022-02-09 03:05:07,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10839 to 8986. [2022-02-09 03:05:07,034 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) [2022-02-09 03:05:07,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8986 states to 8986 states and 39672 transitions. [2022-02-09 03:05:07,079 INFO L78 Accepts]: Start accepts. Automaton has 8986 states and 39672 transitions. Word has length 33 [2022-02-09 03:05:07,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:05:07,079 INFO L470 AbstractCegarLoop]: Abstraction has 8986 states and 39672 transitions. [2022-02-09 03:05:07,080 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) [2022-02-09 03:05:07,080 INFO L276 IsEmpty]: Start isEmpty. Operand 8986 states and 39672 transitions. [2022-02-09 03:05:07,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:05:07,103 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:05:07,103 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] [2022-02-09 03:05:07,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-02-09 03:05:07,319 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 [2022-02-09 03:05:07,319 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:05:07,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:05:07,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1951256657, now seen corresponding path program 51 times [2022-02-09 03:05:07,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:05:07,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382949802] [2022-02-09 03:05:07,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:05:07,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:05:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:05:07,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:07,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:05:07,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382949802] [2022-02-09 03:05:07,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382949802] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:05:07,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373229727] [2022-02-09 03:05:07,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:05:07,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:05:07,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:05:07,640 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) [2022-02-09 03:05:07,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-02-09 03:05:07,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-09 03:05:07,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:05:07,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-09 03:05:07,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:05:07,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:05:07,961 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-02-09 03:05:07,961 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 [2022-02-09 03:05:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:08,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:05:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:08,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373229727] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:05:08,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:05:08,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 34 [2022-02-09 03:05:08,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831156078] [2022-02-09 03:05:08,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:05:08,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-09 03:05:08,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:05:08,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-09 03:05:08,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-02-09 03:05:08,502 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) [2022-02-09 03:05:11,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:05:11,823 INFO L93 Difference]: Finished difference Result 10851 states and 46437 transitions. [2022-02-09 03:05:11,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-09 03:05:11,824 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 [2022-02-09 03:05:11,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:05:11,857 INFO L225 Difference]: With dead ends: 10851 [2022-02-09 03:05:11,857 INFO L226 Difference]: Without dead ends: 10821 [2022-02-09 03:05:11,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=585, Invalid=4527, Unknown=0, NotChecked=0, Total=5112 [2022-02-09 03:05:11,858 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 1094 mSDsluCounter, 3612 mSDsCounter, 0 mSdLazyCounter, 4858 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-02-09 03:05:11,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1094 Valid, 1359 Invalid, 5013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 4858 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-09 03:05:11,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10821 states. [2022-02-09 03:05:12,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10821 to 9150. [2022-02-09 03:05:12,124 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) [2022-02-09 03:05:12,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9150 states to 9150 states and 40434 transitions. [2022-02-09 03:05:12,167 INFO L78 Accepts]: Start accepts. Automaton has 9150 states and 40434 transitions. Word has length 33 [2022-02-09 03:05:12,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:05:12,167 INFO L470 AbstractCegarLoop]: Abstraction has 9150 states and 40434 transitions. [2022-02-09 03:05:12,167 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) [2022-02-09 03:05:12,167 INFO L276 IsEmpty]: Start isEmpty. Operand 9150 states and 40434 transitions. [2022-02-09 03:05:12,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:05:12,191 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:05:12,191 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] [2022-02-09 03:05:12,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-02-09 03:05:12,414 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 [2022-02-09 03:05:12,414 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:05:12,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:05:12,415 INFO L85 PathProgramCache]: Analyzing trace with hash 648899597, now seen corresponding path program 52 times [2022-02-09 03:05:12,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:05:12,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484280978] [2022-02-09 03:05:12,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:05:12,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:05:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:05:12,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:12,678 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:05:12,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484280978] [2022-02-09 03:05:12,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484280978] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:05:12,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275091612] [2022-02-09 03:05:12,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:05:12,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:05:12,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:05:12,680 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) [2022-02-09 03:05:12,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-02-09 03:05:12,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:05:12,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:05:12,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:05:12,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:05:13,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:05:13,013 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 [2022-02-09 03:05:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:13,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:05:13,492 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:05:13,493 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 [2022-02-09 03:05:13,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:05:13,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:05:13,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:05:13,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:05:13,550 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 [2022-02-09 03:05:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:13,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275091612] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:05:13,591 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:05:13,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:05:13,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201100957] [2022-02-09 03:05:13,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:05:13,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:05:13,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:05:13,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:05:13,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=965, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:05:13,592 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) [2022-02-09 03:05:18,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:05:18,037 INFO L93 Difference]: Finished difference Result 11007 states and 47193 transitions. [2022-02-09 03:05:18,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-09 03:05:18,037 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 [2022-02-09 03:05:18,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:05:18,073 INFO L225 Difference]: With dead ends: 11007 [2022-02-09 03:05:18,073 INFO L226 Difference]: Without dead ends: 10992 [2022-02-09 03:05:18,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=534, Invalid=5016, Unknown=0, NotChecked=0, Total=5550 [2022-02-09 03:05:18,074 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 731 mSDsluCounter, 3602 mSDsCounter, 0 mSdLazyCounter, 4797 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.2s IncrementalHoareTripleChecker+Time [2022-02-09 03:05:18,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [731 Valid, 1480 Invalid, 4930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 4797 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-09 03:05:18,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10992 states. [2022-02-09 03:05:18,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10992 to 9150. [2022-02-09 03:05:18,280 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) [2022-02-09 03:05:18,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9150 states to 9150 states and 40434 transitions. [2022-02-09 03:05:18,315 INFO L78 Accepts]: Start accepts. Automaton has 9150 states and 40434 transitions. Word has length 33 [2022-02-09 03:05:18,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:05:18,315 INFO L470 AbstractCegarLoop]: Abstraction has 9150 states and 40434 transitions. [2022-02-09 03:05:18,315 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) [2022-02-09 03:05:18,315 INFO L276 IsEmpty]: Start isEmpty. Operand 9150 states and 40434 transitions. [2022-02-09 03:05:18,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:05:18,335 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:05:18,335 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] [2022-02-09 03:05:18,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-02-09 03:05:18,551 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 [2022-02-09 03:05:18,551 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:05:18,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:05:18,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1561474901, now seen corresponding path program 53 times [2022-02-09 03:05:18,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:05:18,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645089747] [2022-02-09 03:05:18,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:05:18,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:05:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:05:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:18,941 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:05:18,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645089747] [2022-02-09 03:05:18,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645089747] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:05:18,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009949841] [2022-02-09 03:05:18,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:05:18,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:05:18,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:05:18,943 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) [2022-02-09 03:05:18,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-02-09 03:05:18,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-09 03:05:18,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:05:18,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:05:18,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:05:19,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:05:19,339 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 35 treesize of output 19 [2022-02-09 03:05:19,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:19,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:05:19,789 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:05:19,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-02-09 03:05:19,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:05:19,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:05:19,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:05:19,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:05:19,844 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 [2022-02-09 03:05:19,941 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:19,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009949841] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:05:19,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:05:19,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-09 03:05:19,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586454016] [2022-02-09 03:05:19,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:05:19,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:05:19,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:05:19,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:05:19,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:05:19,943 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) [2022-02-09 03:05:24,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:05:24,439 INFO L93 Difference]: Finished difference Result 11316 states and 48188 transitions. [2022-02-09 03:05:24,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-09 03:05:24,440 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 [2022-02-09 03:05:24,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:05:24,474 INFO L225 Difference]: With dead ends: 11316 [2022-02-09 03:05:24,474 INFO L226 Difference]: Without dead ends: 11292 [2022-02-09 03:05:24,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=569, Invalid=4981, Unknown=0, NotChecked=0, Total=5550 [2022-02-09 03:05:24,475 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 773 mSDsluCounter, 3986 mSDsCounter, 0 mSdLazyCounter, 5379 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.3s IncrementalHoareTripleChecker+Time [2022-02-09 03:05:24,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 1699 Invalid, 5524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 5379 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-09 03:05:24,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11292 states. [2022-02-09 03:05:24,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11292 to 9150. [2022-02-09 03:05:24,663 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) [2022-02-09 03:05:24,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9150 states to 9150 states and 40434 transitions. [2022-02-09 03:05:24,694 INFO L78 Accepts]: Start accepts. Automaton has 9150 states and 40434 transitions. Word has length 33 [2022-02-09 03:05:24,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:05:24,694 INFO L470 AbstractCegarLoop]: Abstraction has 9150 states and 40434 transitions. [2022-02-09 03:05:24,694 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) [2022-02-09 03:05:24,695 INFO L276 IsEmpty]: Start isEmpty. Operand 9150 states and 40434 transitions. [2022-02-09 03:05:24,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:05:24,758 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:05:24,758 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] [2022-02-09 03:05:24,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-02-09 03:05:24,959 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 [2022-02-09 03:05:24,959 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:05:24,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:05:24,959 INFO L85 PathProgramCache]: Analyzing trace with hash -399872805, now seen corresponding path program 54 times [2022-02-09 03:05:24,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:05:24,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438155757] [2022-02-09 03:05:24,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:05:24,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:05:24,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:05:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:25,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:05:25,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438155757] [2022-02-09 03:05:25,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438155757] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:05:25,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206203056] [2022-02-09 03:05:25,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:05:25,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:05:25,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:05:25,160 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) [2022-02-09 03:05:25,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-02-09 03:05:25,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-09 03:05:25,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:05:25,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:05:25,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:05:25,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:05:25,481 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 [2022-02-09 03:05:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:26,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:05:26,593 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:05:26,593 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 [2022-02-09 03:05:26,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:05:26,603 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 [2022-02-09 03:05:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:26,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206203056] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:05:26,654 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:05:26,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-09 03:05:26,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210634080] [2022-02-09 03:05:26,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:05:26,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:05:26,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:05:26,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:05:26,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:05:26,655 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) [2022-02-09 03:05:29,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:05:29,232 INFO L93 Difference]: Finished difference Result 10442 states and 45297 transitions. [2022-02-09 03:05:29,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-09 03:05:29,232 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 [2022-02-09 03:05:29,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:05:29,264 INFO L225 Difference]: With dead ends: 10442 [2022-02-09 03:05:29,264 INFO L226 Difference]: Without dead ends: 10412 [2022-02-09 03:05:29,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=485, Invalid=3547, Unknown=0, NotChecked=0, Total=4032 [2022-02-09 03:05:29,265 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 734 mSDsluCounter, 2760 mSDsCounter, 0 mSdLazyCounter, 2827 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-02-09 03:05:29,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 1066 Invalid, 3604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2827 Invalid, 0 Unknown, 664 Unchecked, 1.2s Time] [2022-02-09 03:05:29,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10412 states. [2022-02-09 03:05:29,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10412 to 9389. [2022-02-09 03:05:29,541 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) [2022-02-09 03:05:29,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9389 states to 9389 states and 41454 transitions. [2022-02-09 03:05:29,576 INFO L78 Accepts]: Start accepts. Automaton has 9389 states and 41454 transitions. Word has length 33 [2022-02-09 03:05:29,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:05:29,576 INFO L470 AbstractCegarLoop]: Abstraction has 9389 states and 41454 transitions. [2022-02-09 03:05:29,576 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) [2022-02-09 03:05:29,576 INFO L276 IsEmpty]: Start isEmpty. Operand 9389 states and 41454 transitions. [2022-02-09 03:05:29,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:05:29,595 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:05:29,596 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] [2022-02-09 03:05:29,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-02-09 03:05:29,811 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 [2022-02-09 03:05:29,811 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:05:29,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:05:29,812 INFO L85 PathProgramCache]: Analyzing trace with hash 487630876, now seen corresponding path program 5 times [2022-02-09 03:05:29,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:05:29,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514857699] [2022-02-09 03:05:29,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:05:29,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:05:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:05:30,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:30,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:05:30,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514857699] [2022-02-09 03:05:30,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514857699] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:05:30,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088359681] [2022-02-09 03:05:30,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:05:30,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:05:30,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:05:30,013 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) [2022-02-09 03:05:30,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-02-09 03:05:30,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-09 03:05:30,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:05:30,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:05:30,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:05:30,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:05:30,355 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 [2022-02-09 03:05:30,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:30,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:05:30,795 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:05:30,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-02-09 03:05:30,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:05:30,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:05:30,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:05:30,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:05:30,860 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 [2022-02-09 03:05:30,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:30,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088359681] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:05:30,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:05:30,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:05:30,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094242586] [2022-02-09 03:05:30,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:05:30,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:05:30,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:05:30,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:05:30,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:05:30,912 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) [2022-02-09 03:05:33,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:05:33,998 INFO L93 Difference]: Finished difference Result 11328 states and 48701 transitions. [2022-02-09 03:05:33,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-09 03:05:33,999 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 [2022-02-09 03:05:33,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:05:34,034 INFO L225 Difference]: With dead ends: 11328 [2022-02-09 03:05:34,034 INFO L226 Difference]: Without dead ends: 11198 [2022-02-09 03:05:34,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=641, Invalid=4615, Unknown=0, NotChecked=0, Total=5256 [2022-02-09 03:05:34,035 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 696 mSDsluCounter, 2913 mSDsCounter, 0 mSdLazyCounter, 4054 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:05:34,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 1146 Invalid, 4177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 4054 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-09 03:05:34,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11198 states. [2022-02-09 03:05:34,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11198 to 9157. [2022-02-09 03:05:34,293 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) [2022-02-09 03:05:34,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9157 states to 9157 states and 40512 transitions. [2022-02-09 03:05:34,325 INFO L78 Accepts]: Start accepts. Automaton has 9157 states and 40512 transitions. Word has length 33 [2022-02-09 03:05:34,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:05:34,325 INFO L470 AbstractCegarLoop]: Abstraction has 9157 states and 40512 transitions. [2022-02-09 03:05:34,325 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) [2022-02-09 03:05:34,325 INFO L276 IsEmpty]: Start isEmpty. Operand 9157 states and 40512 transitions. [2022-02-09 03:05:34,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:05:34,344 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:05:34,344 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] [2022-02-09 03:05:34,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-02-09 03:05:34,559 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 [2022-02-09 03:05:34,559 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:05:34,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:05:34,560 INFO L85 PathProgramCache]: Analyzing trace with hash 119359515, now seen corresponding path program 55 times [2022-02-09 03:05:34,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:05:34,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675260429] [2022-02-09 03:05:34,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:05:34,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:05:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:05:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:34,760 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:05:34,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675260429] [2022-02-09 03:05:34,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675260429] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:05:34,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574731880] [2022-02-09 03:05:34,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:05:34,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:05:34,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:05:34,761 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) [2022-02-09 03:05:34,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-02-09 03:05:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:05:34,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:05:34,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:05:35,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:05:35,107 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 [2022-02-09 03:05:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:35,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:05:35,571 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:05:35,571 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 [2022-02-09 03:05:35,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:05:35,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:05:35,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:05:35,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:05:35,623 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 [2022-02-09 03:05:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:35,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574731880] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:05:35,676 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:05:35,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:05:35,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30394624] [2022-02-09 03:05:35,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:05:35,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:05:35,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:05:35,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:05:35,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:05:35,677 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) [2022-02-09 03:05:39,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:05:39,099 INFO L93 Difference]: Finished difference Result 10339 states and 45035 transitions. [2022-02-09 03:05:39,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-09 03:05:39,099 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 [2022-02-09 03:05:39,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:05:39,136 INFO L225 Difference]: With dead ends: 10339 [2022-02-09 03:05:39,136 INFO L226 Difference]: Without dead ends: 10261 [2022-02-09 03:05:39,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=473, Invalid=4497, Unknown=0, NotChecked=0, Total=4970 [2022-02-09 03:05:39,138 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 541 mSDsluCounter, 3622 mSDsCounter, 0 mSdLazyCounter, 4968 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 2.0s IncrementalHoareTripleChecker+Time [2022-02-09 03:05:39,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 1396 Invalid, 5063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 4968 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-09 03:05:39,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10261 states. [2022-02-09 03:05:39,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10261 to 9142. [2022-02-09 03:05:39,400 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) [2022-02-09 03:05:39,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9142 states to 9142 states and 40453 transitions. [2022-02-09 03:05:39,436 INFO L78 Accepts]: Start accepts. Automaton has 9142 states and 40453 transitions. Word has length 33 [2022-02-09 03:05:39,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:05:39,436 INFO L470 AbstractCegarLoop]: Abstraction has 9142 states and 40453 transitions. [2022-02-09 03:05:39,436 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) [2022-02-09 03:05:39,436 INFO L276 IsEmpty]: Start isEmpty. Operand 9142 states and 40453 transitions. [2022-02-09 03:05:39,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:05:39,455 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:05:39,455 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] [2022-02-09 03:05:39,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-02-09 03:05:39,670 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 [2022-02-09 03:05:39,670 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:05:39,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:05:39,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1984743527, now seen corresponding path program 56 times [2022-02-09 03:05:39,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:05:39,671 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958838559] [2022-02-09 03:05:39,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:05:39,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:05:39,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:05:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:39,949 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:05:39,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958838559] [2022-02-09 03:05:39,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958838559] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:05:39,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199513775] [2022-02-09 03:05:39,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:05:39,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:05:39,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:05:39,951 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) [2022-02-09 03:05:39,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-02-09 03:05:40,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:05:40,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:05:40,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:05:40,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:05:40,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:05:40,453 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-09 03:05:40,453 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 [2022-02-09 03:05:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:40,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:05:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:40,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199513775] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:05:40,987 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:05:40,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-09 03:05:40,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88301059] [2022-02-09 03:05:40,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:05:40,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-09 03:05:40,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:05:40,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-09 03:05:40,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2022-02-09 03:05:40,988 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) [2022-02-09 03:05:44,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:05:44,463 INFO L93 Difference]: Finished difference Result 11651 states and 50339 transitions. [2022-02-09 03:05:44,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-09 03:05:44,463 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 [2022-02-09 03:05:44,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:05:44,562 INFO L225 Difference]: With dead ends: 11651 [2022-02-09 03:05:44,562 INFO L226 Difference]: Without dead ends: 11586 [2022-02-09 03:05:44,562 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 [2022-02-09 03:05:44,563 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 983 mSDsluCounter, 3217 mSDsCounter, 0 mSdLazyCounter, 4125 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-02-09 03:05:44,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [983 Valid, 1302 Invalid, 4306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 4125 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-09 03:05:44,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11586 states. [2022-02-09 03:05:44,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11586 to 9220. [2022-02-09 03:05:44,732 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) [2022-02-09 03:05:44,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9220 states to 9220 states and 40825 transitions. [2022-02-09 03:05:44,764 INFO L78 Accepts]: Start accepts. Automaton has 9220 states and 40825 transitions. Word has length 33 [2022-02-09 03:05:44,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:05:44,764 INFO L470 AbstractCegarLoop]: Abstraction has 9220 states and 40825 transitions. [2022-02-09 03:05:44,764 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) [2022-02-09 03:05:44,764 INFO L276 IsEmpty]: Start isEmpty. Operand 9220 states and 40825 transitions. [2022-02-09 03:05:44,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:05:44,783 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:05:44,783 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] [2022-02-09 03:05:44,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-02-09 03:05:44,999 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 [2022-02-09 03:05:45,000 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:05:45,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:05:45,000 INFO L85 PathProgramCache]: Analyzing trace with hash 51101753, now seen corresponding path program 57 times [2022-02-09 03:05:45,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:05:45,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479639285] [2022-02-09 03:05:45,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:05:45,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:05:45,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:05:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:45,162 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:05:45,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479639285] [2022-02-09 03:05:45,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479639285] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:05:45,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278140054] [2022-02-09 03:05:45,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:05:45,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:05:45,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:05:45,163 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) [2022-02-09 03:05:45,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-02-09 03:05:45,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-09 03:05:45,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:05:45,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:05:45,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:05:45,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:05:45,441 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-02-09 03:05:45,441 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 [2022-02-09 03:05:45,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:45,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:05:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:45,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278140054] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:05:45,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:05:45,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-09 03:05:45,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508207144] [2022-02-09 03:05:45,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:05:45,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:05:45,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:05:45,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:05:45,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:05:45,858 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) [2022-02-09 03:05:49,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:05:49,618 INFO L93 Difference]: Finished difference Result 13656 states and 58400 transitions. [2022-02-09 03:05:49,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-09 03:05:49,618 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 [2022-02-09 03:05:49,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:05:49,660 INFO L225 Difference]: With dead ends: 13656 [2022-02-09 03:05:49,661 INFO L226 Difference]: Without dead ends: 13606 [2022-02-09 03:05:49,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2498 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=873, Invalid=8057, Unknown=0, NotChecked=0, Total=8930 [2022-02-09 03:05:49,661 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1391 mSDsluCounter, 4263 mSDsCounter, 0 mSdLazyCounter, 5693 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 2.0s IncrementalHoareTripleChecker+Time [2022-02-09 03:05:49,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1391 Valid, 1693 Invalid, 5963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 5693 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-09 03:05:49,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13606 states. [2022-02-09 03:05:49,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13606 to 9526. [2022-02-09 03:05:49,903 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) [2022-02-09 03:05:49,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9526 states to 9526 states and 42390 transitions. [2022-02-09 03:05:49,947 INFO L78 Accepts]: Start accepts. Automaton has 9526 states and 42390 transitions. Word has length 33 [2022-02-09 03:05:49,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:05:49,947 INFO L470 AbstractCegarLoop]: Abstraction has 9526 states and 42390 transitions. [2022-02-09 03:05:49,947 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) [2022-02-09 03:05:49,947 INFO L276 IsEmpty]: Start isEmpty. Operand 9526 states and 42390 transitions. [2022-02-09 03:05:49,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:05:49,974 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:05:49,974 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] [2022-02-09 03:05:49,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-02-09 03:05:50,195 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 [2022-02-09 03:05:50,195 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:05:50,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:05:50,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1354374359, now seen corresponding path program 58 times [2022-02-09 03:05:50,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:05:50,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396212251] [2022-02-09 03:05:50,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:05:50,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:05:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:05:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:50,400 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:05:50,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396212251] [2022-02-09 03:05:50,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396212251] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:05:50,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539493142] [2022-02-09 03:05:50,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:05:50,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:05:50,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:05:50,403 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) [2022-02-09 03:05:50,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-02-09 03:05:50,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:05:50,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:05:50,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:05:50,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:05:50,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:05:50,840 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 [2022-02-09 03:05:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:50,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:05:51,351 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:05:51,351 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 [2022-02-09 03:05:51,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:05:51,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:05:51,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:05:51,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:05:51,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-02-09 03:05:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:51,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539493142] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:05:51,448 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:05:51,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-09 03:05:51,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259386473] [2022-02-09 03:05:51,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:05:51,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:05:51,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:05:51,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:05:51,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:05:51,449 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) [2022-02-09 03:05:53,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:05:53,064 INFO L93 Difference]: Finished difference Result 11176 states and 48742 transitions. [2022-02-09 03:05:53,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-09 03:05:53,064 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 [2022-02-09 03:05:53,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:05:53,103 INFO L225 Difference]: With dead ends: 11176 [2022-02-09 03:05:53,103 INFO L226 Difference]: Without dead ends: 11140 [2022-02-09 03:05:53,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=288, Invalid=2468, Unknown=0, NotChecked=0, Total=2756 [2022-02-09 03:05:53,104 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, 1.1s IncrementalHoareTripleChecker+Time [2022-02-09 03:05:53,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 922 Invalid, 3323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 3238 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-09 03:05:53,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11140 states. [2022-02-09 03:05:53,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11140 to 9777. [2022-02-09 03:05:53,323 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) [2022-02-09 03:05:53,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9777 states to 9777 states and 43572 transitions. [2022-02-09 03:05:53,363 INFO L78 Accepts]: Start accepts. Automaton has 9777 states and 43572 transitions. Word has length 33 [2022-02-09 03:05:53,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:05:53,363 INFO L470 AbstractCegarLoop]: Abstraction has 9777 states and 43572 transitions. [2022-02-09 03:05:53,363 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) [2022-02-09 03:05:53,364 INFO L276 IsEmpty]: Start isEmpty. Operand 9777 states and 43572 transitions. [2022-02-09 03:05:53,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:05:53,386 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:05:53,386 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] [2022-02-09 03:05:53,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-02-09 03:05:53,608 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 [2022-02-09 03:05:53,609 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:05:53,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:05:53,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1300987839, now seen corresponding path program 59 times [2022-02-09 03:05:53,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:05:53,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394370171] [2022-02-09 03:05:53,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:05:53,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:05:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:05:53,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:53,811 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:05:53,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394370171] [2022-02-09 03:05:53,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394370171] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:05:53,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123950008] [2022-02-09 03:05:53,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:05:53,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:05:53,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:05:53,813 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) [2022-02-09 03:05:53,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-02-09 03:05:53,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-09 03:05:53,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:05:53,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-09 03:05:53,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:05:54,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:05:54,113 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 [2022-02-09 03:05:54,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:54,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:05:54,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:05:54,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:05:54,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:05:54,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:05:54,499 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 [2022-02-09 03:05:54,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:05:54,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:05:54,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:05:54,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:05:54,531 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 [2022-02-09 03:05:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:05:54,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123950008] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:05:54,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:05:54,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-02-09 03:05:54,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098314664] [2022-02-09 03:05:54,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:05:54,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-09 03:05:54,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:05:54,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-09 03:05:54,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2022-02-09 03:05:54,603 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) [2022-02-09 03:06:02,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:06:02,307 INFO L93 Difference]: Finished difference Result 13528 states and 57066 transitions. [2022-02-09 03:06:02,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-02-09 03:06:02,307 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 [2022-02-09 03:06:02,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:06:02,347 INFO L225 Difference]: With dead ends: 13528 [2022-02-09 03:06:02,348 INFO L226 Difference]: Without dead ends: 13439 [2022-02-09 03:06:02,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4692 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1813, Invalid=12229, Unknown=0, NotChecked=0, Total=14042 [2022-02-09 03:06:02,348 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1737 mSDsluCounter, 4563 mSDsCounter, 0 mSdLazyCounter, 6214 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s 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, 2.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:06:02,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1737 Valid, 1787 Invalid, 6511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 6214 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-09 03:06:02,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13439 states. [2022-02-09 03:06:02,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13439 to 9963. [2022-02-09 03:06:02,559 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) [2022-02-09 03:06:02,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9963 states to 9963 states and 44463 transitions. [2022-02-09 03:06:02,595 INFO L78 Accepts]: Start accepts. Automaton has 9963 states and 44463 transitions. Word has length 33 [2022-02-09 03:06:02,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:06:02,595 INFO L470 AbstractCegarLoop]: Abstraction has 9963 states and 44463 transitions. [2022-02-09 03:06:02,595 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) [2022-02-09 03:06:02,595 INFO L276 IsEmpty]: Start isEmpty. Operand 9963 states and 44463 transitions. [2022-02-09 03:06:02,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:06:02,615 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:06:02,616 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] [2022-02-09 03:06:02,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-02-09 03:06:02,831 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 [2022-02-09 03:06:02,831 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:06:02,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:06:02,831 INFO L85 PathProgramCache]: Analyzing trace with hash 570334073, now seen corresponding path program 60 times [2022-02-09 03:06:02,831 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:06:02,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046532931] [2022-02-09 03:06:02,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:06:02,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:06:02,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:06:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:03,019 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:06:03,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046532931] [2022-02-09 03:06:03,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046532931] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:06:03,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538350375] [2022-02-09 03:06:03,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:06:03,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:06:03,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:06:03,021 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) [2022-02-09 03:06:03,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-02-09 03:06:03,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-09 03:06:03,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:06:03,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:06:03,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:06:03,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:06:03,393 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-02-09 03:06:03,393 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 [2022-02-09 03:06:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:03,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:06:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:04,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538350375] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:06:04,016 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:06:04,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-02-09 03:06:04,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532208106] [2022-02-09 03:06:04,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:06:04,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:06:04,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:06:04,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:06:04,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:06:04,017 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) [2022-02-09 03:06:09,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:06:09,220 INFO L93 Difference]: Finished difference Result 14892 states and 64988 transitions. [2022-02-09 03:06:09,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-09 03:06:09,220 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 [2022-02-09 03:06:09,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:06:09,274 INFO L225 Difference]: With dead ends: 14892 [2022-02-09 03:06:09,274 INFO L226 Difference]: Without dead ends: 14824 [2022-02-09 03:06:09,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2423 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=804, Invalid=8126, Unknown=0, NotChecked=0, Total=8930 [2022-02-09 03:06:09,275 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 1077 mSDsluCounter, 4734 mSDsCounter, 0 mSdLazyCounter, 6071 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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, 2.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:06:09,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1077 Valid, 1873 Invalid, 6287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 6071 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-09 03:06:09,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14824 states. [2022-02-09 03:06:09,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14824 to 11016. [2022-02-09 03:06:09,556 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) [2022-02-09 03:06:09,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11016 states to 11016 states and 50142 transitions. [2022-02-09 03:06:09,599 INFO L78 Accepts]: Start accepts. Automaton has 11016 states and 50142 transitions. Word has length 33 [2022-02-09 03:06:09,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:06:09,600 INFO L470 AbstractCegarLoop]: Abstraction has 11016 states and 50142 transitions. [2022-02-09 03:06:09,600 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) [2022-02-09 03:06:09,600 INFO L276 IsEmpty]: Start isEmpty. Operand 11016 states and 50142 transitions. [2022-02-09 03:06:09,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:06:09,625 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:06:09,625 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] [2022-02-09 03:06:09,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-02-09 03:06:09,839 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 [2022-02-09 03:06:09,840 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:06:09,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:06:09,840 INFO L85 PathProgramCache]: Analyzing trace with hash 326417503, now seen corresponding path program 61 times [2022-02-09 03:06:09,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:06:09,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935133582] [2022-02-09 03:06:09,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:06:09,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:06:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:06:10,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:10,103 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:06:10,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935133582] [2022-02-09 03:06:10,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935133582] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:06:10,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255877832] [2022-02-09 03:06:10,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:06:10,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:06:10,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:06:10,105 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) [2022-02-09 03:06:10,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-02-09 03:06:10,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:06:10,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:06:10,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:06:10,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:06:10,772 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 [2022-02-09 03:06:10,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:10,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:06:11,457 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:06:11,457 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 [2022-02-09 03:06:11,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:06:11,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:06:11,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:06:11,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:06:11,533 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 [2022-02-09 03:06:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:11,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255877832] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:06:11,578 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:06:11,578 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:06:11,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623056443] [2022-02-09 03:06:11,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:06:11,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:06:11,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:06:11,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:06:11,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:06:11,579 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) [2022-02-09 03:06:13,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:06:13,762 INFO L93 Difference]: Finished difference Result 12046 states and 53910 transitions. [2022-02-09 03:06:13,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-09 03:06:13,762 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 [2022-02-09 03:06:13,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:06:13,798 INFO L225 Difference]: With dead ends: 12046 [2022-02-09 03:06:13,799 INFO L226 Difference]: Without dead ends: 11981 [2022-02-09 03:06:13,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=249, Invalid=2721, Unknown=0, NotChecked=0, Total=2970 [2022-02-09 03:06:13,799 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 433 mSDsluCounter, 2646 mSDsCounter, 0 mSdLazyCounter, 3567 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:06:13,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 1070 Invalid, 3606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 3567 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-09 03:06:13,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11981 states. [2022-02-09 03:06:13,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11981 to 11016. [2022-02-09 03:06:14,011 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) [2022-02-09 03:06:14,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11016 states to 11016 states and 50142 transitions. [2022-02-09 03:06:14,049 INFO L78 Accepts]: Start accepts. Automaton has 11016 states and 50142 transitions. Word has length 33 [2022-02-09 03:06:14,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:06:14,049 INFO L470 AbstractCegarLoop]: Abstraction has 11016 states and 50142 transitions. [2022-02-09 03:06:14,050 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) [2022-02-09 03:06:14,050 INFO L276 IsEmpty]: Start isEmpty. Operand 11016 states and 50142 transitions. [2022-02-09 03:06:14,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:06:14,072 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:06:14,072 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] [2022-02-09 03:06:14,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-02-09 03:06:14,287 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 [2022-02-09 03:06:14,287 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:06:14,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:06:14,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1256626191, now seen corresponding path program 62 times [2022-02-09 03:06:14,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:06:14,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654507130] [2022-02-09 03:06:14,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:06:14,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:06:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:06:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:14,471 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:06:14,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654507130] [2022-02-09 03:06:14,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654507130] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:06:14,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168560163] [2022-02-09 03:06:14,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:06:14,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:06:14,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:06:14,472 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) [2022-02-09 03:06:14,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-02-09 03:06:14,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:06:14,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:06:14,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:06:14,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:06:14,884 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:06:14,884 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 [2022-02-09 03:06:15,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:15,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:06:15,614 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:06:15,614 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 [2022-02-09 03:06:15,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:06:15,623 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 [2022-02-09 03:06:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:15,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168560163] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:06:15,671 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:06:15,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-02-09 03:06:15,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614406069] [2022-02-09 03:06:15,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:06:15,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-09 03:06:15,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:06:15,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-09 03:06:15,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-02-09 03:06:15,672 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) [2022-02-09 03:06:17,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:06:17,956 INFO L93 Difference]: Finished difference Result 12337 states and 55335 transitions. [2022-02-09 03:06:17,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-09 03:06:17,956 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 [2022-02-09 03:06:17,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:06:17,995 INFO L225 Difference]: With dead ends: 12337 [2022-02-09 03:06:17,995 INFO L226 Difference]: Without dead ends: 12319 [2022-02-09 03:06:17,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=307, Invalid=2555, Unknown=0, NotChecked=0, Total=2862 [2022-02-09 03:06:17,996 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, 1.3s IncrementalHoareTripleChecker+Time [2022-02-09 03:06:17,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 999 Invalid, 3429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 3141 Invalid, 0 Unknown, 212 Unchecked, 1.3s Time] [2022-02-09 03:06:18,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12319 states. [2022-02-09 03:06:18,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12319 to 11064. [2022-02-09 03:06:18,216 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) [2022-02-09 03:06:18,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11064 states to 11064 states and 50281 transitions. [2022-02-09 03:06:18,257 INFO L78 Accepts]: Start accepts. Automaton has 11064 states and 50281 transitions. Word has length 33 [2022-02-09 03:06:18,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:06:18,257 INFO L470 AbstractCegarLoop]: Abstraction has 11064 states and 50281 transitions. [2022-02-09 03:06:18,257 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) [2022-02-09 03:06:18,258 INFO L276 IsEmpty]: Start isEmpty. Operand 11064 states and 50281 transitions. [2022-02-09 03:06:18,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:06:18,279 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:06:18,279 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] [2022-02-09 03:06:18,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-02-09 03:06:18,495 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 [2022-02-09 03:06:18,495 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:06:18,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:06:18,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1806628815, now seen corresponding path program 63 times [2022-02-09 03:06:18,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:06:18,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777702416] [2022-02-09 03:06:18,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:06:18,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:06:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:06:18,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:18,678 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:06:18,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777702416] [2022-02-09 03:06:18,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777702416] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:06:18,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786315609] [2022-02-09 03:06:18,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:06:18,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:06:18,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:06:18,679 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) [2022-02-09 03:06:18,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-02-09 03:06:18,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-09 03:06:18,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:06:18,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:06:18,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:06:19,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:06:19,118 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-02-09 03:06:19,119 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 [2022-02-09 03:06:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:19,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:06:19,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:19,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786315609] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:06:19,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:06:19,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 33 [2022-02-09 03:06:19,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389501521] [2022-02-09 03:06:19,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:06:19,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-09 03:06:19,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:06:19,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-09 03:06:19,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1023, Unknown=0, NotChecked=0, Total=1122 [2022-02-09 03:06:19,738 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) [2022-02-09 03:06:23,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:06:23,813 INFO L93 Difference]: Finished difference Result 13285 states and 58444 transitions. [2022-02-09 03:06:23,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-09 03:06:23,814 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 [2022-02-09 03:06:23,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:06:23,860 INFO L225 Difference]: With dead ends: 13285 [2022-02-09 03:06:23,860 INFO L226 Difference]: Without dead ends: 13211 [2022-02-09 03:06:23,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=544, Invalid=5776, Unknown=0, NotChecked=0, Total=6320 [2022-02-09 03:06:23,861 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 850 mSDsluCounter, 4043 mSDsCounter, 0 mSdLazyCounter, 5116 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.2s IncrementalHoareTripleChecker+Time [2022-02-09 03:06:23,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [850 Valid, 1669 Invalid, 5266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 5116 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-09 03:06:23,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13211 states. [2022-02-09 03:06:24,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13211 to 11058. [2022-02-09 03:06:24,094 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) [2022-02-09 03:06:24,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11058 states to 11058 states and 50349 transitions. [2022-02-09 03:06:24,234 INFO L78 Accepts]: Start accepts. Automaton has 11058 states and 50349 transitions. Word has length 33 [2022-02-09 03:06:24,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:06:24,234 INFO L470 AbstractCegarLoop]: Abstraction has 11058 states and 50349 transitions. [2022-02-09 03:06:24,234 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) [2022-02-09 03:06:24,234 INFO L276 IsEmpty]: Start isEmpty. Operand 11058 states and 50349 transitions. [2022-02-09 03:06:24,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:06:24,257 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:06:24,257 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] [2022-02-09 03:06:24,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-02-09 03:06:24,473 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 [2022-02-09 03:06:24,473 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:06:24,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:06:24,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1813873799, now seen corresponding path program 64 times [2022-02-09 03:06:24,473 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:06:24,473 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847565324] [2022-02-09 03:06:24,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:06:24,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:06:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:06:24,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:24,653 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:06:24,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847565324] [2022-02-09 03:06:24,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847565324] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:06:24,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685300628] [2022-02-09 03:06:24,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:06:24,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:06:24,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:06:24,655 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) [2022-02-09 03:06:24,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-02-09 03:06:24,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:06:24,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:06:24,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:06:24,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:06:25,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:06:25,149 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 [2022-02-09 03:06:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:25,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:06:25,583 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:06:25,584 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 [2022-02-09 03:06:25,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:06:25,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:06:25,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:06:25,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:06:25,651 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 7 [2022-02-09 03:06:25,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:25,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685300628] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:06:25,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:06:25,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:06:25,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169751674] [2022-02-09 03:06:25,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:06:25,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:06:25,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:06:25,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:06:25,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:06:25,702 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) [2022-02-09 03:06:27,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:06:27,323 INFO L93 Difference]: Finished difference Result 11637 states and 52576 transitions. [2022-02-09 03:06:27,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-09 03:06:27,323 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 [2022-02-09 03:06:27,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:06:27,360 INFO L225 Difference]: With dead ends: 11637 [2022-02-09 03:06:27,360 INFO L226 Difference]: Without dead ends: 11626 [2022-02-09 03:06:27,360 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 [2022-02-09 03:06:27,361 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 326 mSDsluCounter, 2090 mSDsCounter, 0 mSdLazyCounter, 2684 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.1s IncrementalHoareTripleChecker+Time [2022-02-09 03:06:27,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 863 Invalid, 2735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2684 Invalid, 0 Unknown, 25 Unchecked, 1.1s Time] [2022-02-09 03:06:27,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11626 states. [2022-02-09 03:06:27,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11626 to 11149. [2022-02-09 03:06:27,564 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) [2022-02-09 03:06:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11149 states to 11149 states and 50618 transitions. [2022-02-09 03:06:27,605 INFO L78 Accepts]: Start accepts. Automaton has 11149 states and 50618 transitions. Word has length 33 [2022-02-09 03:06:27,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:06:27,606 INFO L470 AbstractCegarLoop]: Abstraction has 11149 states and 50618 transitions. [2022-02-09 03:06:27,606 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) [2022-02-09 03:06:27,606 INFO L276 IsEmpty]: Start isEmpty. Operand 11149 states and 50618 transitions. [2022-02-09 03:06:27,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:06:27,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:06:27,630 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] [2022-02-09 03:06:27,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-02-09 03:06:27,846 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 [2022-02-09 03:06:27,846 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:06:27,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:06:27,846 INFO L85 PathProgramCache]: Analyzing trace with hash -926370118, now seen corresponding path program 6 times [2022-02-09 03:06:27,846 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:06:27,846 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63810749] [2022-02-09 03:06:27,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:06:27,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:06:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:06:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:28,035 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:06:28,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63810749] [2022-02-09 03:06:28,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63810749] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:06:28,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696990381] [2022-02-09 03:06:28,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:06:28,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:06:28,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:06:28,036 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) [2022-02-09 03:06:28,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-02-09 03:06:28,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-09 03:06:28,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:06:28,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:06:28,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:06:28,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:06:28,624 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-02-09 03:06:28,624 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 [2022-02-09 03:06:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:28,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:06:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:29,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696990381] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:06:29,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:06:29,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-02-09 03:06:29,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16877972] [2022-02-09 03:06:29,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:06:29,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-09 03:06:29,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:06:29,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-09 03:06:29,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1156, Unknown=0, NotChecked=0, Total=1260 [2022-02-09 03:06:29,236 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) [2022-02-09 03:06:34,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:06:34,564 INFO L93 Difference]: Finished difference Result 14471 states and 63309 transitions. [2022-02-09 03:06:34,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-09 03:06:34,564 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 [2022-02-09 03:06:34,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:06:34,607 INFO L225 Difference]: With dead ends: 14471 [2022-02-09 03:06:34,607 INFO L226 Difference]: Without dead ends: 14376 [2022-02-09 03:06:34,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2148 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=755, Invalid=8557, Unknown=0, NotChecked=0, Total=9312 [2022-02-09 03:06:34,608 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 1022 mSDsluCounter, 3921 mSDsCounter, 0 mSdLazyCounter, 5062 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.3s IncrementalHoareTripleChecker+Time [2022-02-09 03:06:34,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 1473 Invalid, 5268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 5062 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-09 03:06:34,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14376 states. [2022-02-09 03:06:34,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14376 to 11127. [2022-02-09 03:06:34,831 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) [2022-02-09 03:06:34,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11127 states to 11127 states and 50671 transitions. [2022-02-09 03:06:34,869 INFO L78 Accepts]: Start accepts. Automaton has 11127 states and 50671 transitions. Word has length 33 [2022-02-09 03:06:34,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:06:34,870 INFO L470 AbstractCegarLoop]: Abstraction has 11127 states and 50671 transitions. [2022-02-09 03:06:34,870 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) [2022-02-09 03:06:34,870 INFO L276 IsEmpty]: Start isEmpty. Operand 11127 states and 50671 transitions. [2022-02-09 03:06:34,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:06:34,892 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:06:34,892 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] [2022-02-09 03:06:34,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-02-09 03:06:35,108 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 [2022-02-09 03:06:35,108 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:06:35,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:06:35,109 INFO L85 PathProgramCache]: Analyzing trace with hash 446804635, now seen corresponding path program 65 times [2022-02-09 03:06:35,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:06:35,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848180652] [2022-02-09 03:06:35,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:06:35,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:06:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:06:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:35,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:06:35,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848180652] [2022-02-09 03:06:35,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848180652] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:06:35,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361148545] [2022-02-09 03:06:35,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:06:35,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:06:35,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:06:35,294 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) [2022-02-09 03:06:35,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-02-09 03:06:35,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-09 03:06:35,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:06:35,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:06:35,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:06:35,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:06:35,728 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 [2022-02-09 03:06:35,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:35,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:06:36,170 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:06:36,170 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 [2022-02-09 03:06:36,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:06:36,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:06:36,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:06:36,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:06:36,237 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 [2022-02-09 03:06:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:36,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361148545] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:06:36,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:06:36,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:06:36,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591192541] [2022-02-09 03:06:36,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:06:36,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:06:36,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:06:36,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:06:36,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:06:36,297 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) [2022-02-09 03:06:38,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:06:38,902 INFO L93 Difference]: Finished difference Result 12144 states and 54457 transitions. [2022-02-09 03:06:38,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-09 03:06:38,902 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 [2022-02-09 03:06:38,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:06:38,940 INFO L225 Difference]: With dead ends: 12144 [2022-02-09 03:06:38,940 INFO L226 Difference]: Without dead ends: 12133 [2022-02-09 03:06:38,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=263, Invalid=2707, Unknown=0, NotChecked=0, Total=2970 [2022-02-09 03:06:38,941 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 401 mSDsluCounter, 3348 mSDsCounter, 0 mSdLazyCounter, 4260 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 4551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 4260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:06:38,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 1373 Invalid, 4551 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [51 Valid, 4260 Invalid, 0 Unknown, 240 Unchecked, 1.7s Time] [2022-02-09 03:06:38,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12133 states. [2022-02-09 03:06:39,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12133 to 11201. [2022-02-09 03:06:39,164 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) [2022-02-09 03:06:39,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11201 states to 11201 states and 50894 transitions. [2022-02-09 03:06:39,207 INFO L78 Accepts]: Start accepts. Automaton has 11201 states and 50894 transitions. Word has length 33 [2022-02-09 03:06:39,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:06:39,207 INFO L470 AbstractCegarLoop]: Abstraction has 11201 states and 50894 transitions. [2022-02-09 03:06:39,207 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) [2022-02-09 03:06:39,207 INFO L276 IsEmpty]: Start isEmpty. Operand 11201 states and 50894 transitions. [2022-02-09 03:06:39,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:06:39,236 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:06:39,236 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] [2022-02-09 03:06:39,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-02-09 03:06:39,443 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 [2022-02-09 03:06:39,443 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:06:39,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:06:39,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1671487815, now seen corresponding path program 66 times [2022-02-09 03:06:39,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:06:39,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248379169] [2022-02-09 03:06:39,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:06:39,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:06:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:06:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:39,628 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:06:39,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248379169] [2022-02-09 03:06:39,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248379169] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:06:39,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443043711] [2022-02-09 03:06:39,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:06:39,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:06:39,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:06:39,630 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) [2022-02-09 03:06:39,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-02-09 03:06:39,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-09 03:06:39,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:06:39,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:06:39,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:06:40,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:06:40,079 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-02-09 03:06:40,079 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 [2022-02-09 03:06:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:40,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:06:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:40,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443043711] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:06:40,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:06:40,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-09 03:06:40,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16446111] [2022-02-09 03:06:40,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:06:40,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-09 03:06:40,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:06:40,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-09 03:06:40,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1086, Unknown=0, NotChecked=0, Total=1190 [2022-02-09 03:06:40,706 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) [2022-02-09 03:06:44,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:06:44,676 INFO L93 Difference]: Finished difference Result 13953 states and 60809 transitions. [2022-02-09 03:06:44,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-09 03:06:44,676 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 [2022-02-09 03:06:44,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:06:44,719 INFO L225 Difference]: With dead ends: 13953 [2022-02-09 03:06:44,720 INFO L226 Difference]: Without dead ends: 13892 [2022-02-09 03:06:44,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=675, Invalid=7157, Unknown=0, NotChecked=0, Total=7832 [2022-02-09 03:06:44,721 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1012 mSDsluCounter, 3542 mSDsCounter, 0 mSdLazyCounter, 4531 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-02-09 03:06:44,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1012 Valid, 1388 Invalid, 4727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 4531 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-09 03:06:44,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13892 states. [2022-02-09 03:06:45,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13892 to 11145. [2022-02-09 03:06:45,045 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) [2022-02-09 03:06:45,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11145 states to 11145 states and 50728 transitions. [2022-02-09 03:06:45,102 INFO L78 Accepts]: Start accepts. Automaton has 11145 states and 50728 transitions. Word has length 33 [2022-02-09 03:06:45,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:06:45,102 INFO L470 AbstractCegarLoop]: Abstraction has 11145 states and 50728 transitions. [2022-02-09 03:06:45,102 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) [2022-02-09 03:06:45,102 INFO L276 IsEmpty]: Start isEmpty. Operand 11145 states and 50728 transitions. [2022-02-09 03:06:45,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:06:45,133 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:06:45,133 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] [2022-02-09 03:06:45,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-02-09 03:06:45,335 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 [2022-02-09 03:06:45,335 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:06:45,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:06:45,336 INFO L85 PathProgramCache]: Analyzing trace with hash -523288529, now seen corresponding path program 67 times [2022-02-09 03:06:45,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:06:45,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664166292] [2022-02-09 03:06:45,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:06:45,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:06:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:06:45,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:45,567 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:06:45,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664166292] [2022-02-09 03:06:45,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664166292] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:06:45,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037932967] [2022-02-09 03:06:45,567 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:06:45,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:06:45,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:06:45,568 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) [2022-02-09 03:06:45,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-02-09 03:06:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:06:45,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:06:45,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:06:45,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:06:45,972 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 [2022-02-09 03:06:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:46,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:06:46,363 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:06:46,363 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 [2022-02-09 03:06:46,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:06:46,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:06:46,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:06:46,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:06:46,430 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 [2022-02-09 03:06:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:46,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037932967] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:06:46,480 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:06:46,480 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-09 03:06:46,480 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011902315] [2022-02-09 03:06:46,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:06:46,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:06:46,480 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:06:46,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:06:46,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:06:46,481 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) [2022-02-09 03:06:49,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:06:49,406 INFO L93 Difference]: Finished difference Result 14490 states and 64069 transitions. [2022-02-09 03:06:49,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-09 03:06:49,407 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 [2022-02-09 03:06:49,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:06:49,454 INFO L225 Difference]: With dead ends: 14490 [2022-02-09 03:06:49,455 INFO L226 Difference]: Without dead ends: 14399 [2022-02-09 03:06:49,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=517, Invalid=4313, Unknown=0, NotChecked=0, Total=4830 [2022-02-09 03:06:49,455 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 701 mSDsluCounter, 3959 mSDsCounter, 0 mSdLazyCounter, 4371 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.9s IncrementalHoareTripleChecker+Time [2022-02-09 03:06:49,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 1604 Invalid, 5277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 4371 Invalid, 0 Unknown, 793 Unchecked, 1.9s Time] [2022-02-09 03:06:49,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14399 states. [2022-02-09 03:06:49,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14399 to 11502. [2022-02-09 03:06:49,761 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) [2022-02-09 03:06:49,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11502 states to 11502 states and 52488 transitions. [2022-02-09 03:06:49,804 INFO L78 Accepts]: Start accepts. Automaton has 11502 states and 52488 transitions. Word has length 33 [2022-02-09 03:06:49,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:06:49,804 INFO L470 AbstractCegarLoop]: Abstraction has 11502 states and 52488 transitions. [2022-02-09 03:06:49,804 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) [2022-02-09 03:06:49,804 INFO L276 IsEmpty]: Start isEmpty. Operand 11502 states and 52488 transitions. [2022-02-09 03:06:49,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:06:49,829 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:06:49,829 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] [2022-02-09 03:06:49,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-02-09 03:06:50,043 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 [2022-02-09 03:06:50,043 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:06:50,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:06:50,044 INFO L85 PathProgramCache]: Analyzing trace with hash 779984077, now seen corresponding path program 68 times [2022-02-09 03:06:50,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:06:50,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703260922] [2022-02-09 03:06:50,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:06:50,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:06:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:06:50,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:50,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:06:50,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703260922] [2022-02-09 03:06:50,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703260922] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:06:50,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430972662] [2022-02-09 03:06:50,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:06:50,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:06:50,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:06:50,311 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) [2022-02-09 03:06:50,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-02-09 03:06:50,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:06:50,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:06:50,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:06:50,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:06:50,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:06:50,700 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 31 treesize of output 47 [2022-02-09 03:06:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:51,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:06:51,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:06:51,594 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 [2022-02-09 03:06:51,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:06:51,604 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 [2022-02-09 03:06:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:51,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430972662] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:06:51,655 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:06:51,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 28 [2022-02-09 03:06:51,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372565246] [2022-02-09 03:06:51,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:06:51,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-09 03:06:51,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:06:51,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-09 03:06:51,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=704, Unknown=1, NotChecked=0, Total=812 [2022-02-09 03:06:51,656 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) [2022-02-09 03:06:53,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:06:53,434 INFO L93 Difference]: Finished difference Result 12534 states and 56539 transitions. [2022-02-09 03:06:53,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-09 03:06:53,434 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 [2022-02-09 03:06:53,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:06:53,477 INFO L225 Difference]: With dead ends: 12534 [2022-02-09 03:06:53,478 INFO L226 Difference]: Without dead ends: 12523 [2022-02-09 03:06:53,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=262, Invalid=1807, Unknown=1, NotChecked=0, Total=2070 [2022-02-09 03:06:53,480 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 519 mSDsluCounter, 2563 mSDsCounter, 0 mSdLazyCounter, 2807 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 3568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 701 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-09 03:06:53,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 1065 Invalid, 3568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2807 Invalid, 0 Unknown, 701 Unchecked, 1.2s Time] [2022-02-09 03:06:53,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12523 states. [2022-02-09 03:06:53,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12523 to 11538. [2022-02-09 03:06:53,781 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) [2022-02-09 03:06:53,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11538 states to 11538 states and 52612 transitions. [2022-02-09 03:06:53,822 INFO L78 Accepts]: Start accepts. Automaton has 11538 states and 52612 transitions. Word has length 33 [2022-02-09 03:06:53,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:06:53,822 INFO L470 AbstractCegarLoop]: Abstraction has 11538 states and 52612 transitions. [2022-02-09 03:06:53,822 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) [2022-02-09 03:06:53,822 INFO L276 IsEmpty]: Start isEmpty. Operand 11538 states and 52612 transitions. [2022-02-09 03:06:53,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:06:53,846 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:06:53,846 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] [2022-02-09 03:06:53,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-02-09 03:06:54,059 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 [2022-02-09 03:06:54,059 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:06:54,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:06:54,060 INFO L85 PathProgramCache]: Analyzing trace with hash 583470572, now seen corresponding path program 7 times [2022-02-09 03:06:54,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:06:54,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457165081] [2022-02-09 03:06:54,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:06:54,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:06:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:06:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:54,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:06:54,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457165081] [2022-02-09 03:06:54,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457165081] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:06:54,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140995462] [2022-02-09 03:06:54,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:06:54,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:06:54,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:06:54,239 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) [2022-02-09 03:06:54,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-02-09 03:06:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:06:54,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:06:54,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:06:54,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:06:54,627 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 [2022-02-09 03:06:54,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:54,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:06:55,010 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:06:55,011 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 [2022-02-09 03:06:55,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:06:55,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:06:55,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:06:55,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:06:55,074 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 [2022-02-09 03:06:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:55,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140995462] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:06:55,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:06:55,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-02-09 03:06:55,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181295753] [2022-02-09 03:06:55,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:06:55,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-09 03:06:55,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:06:55,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-09 03:06:55,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-02-09 03:06:55,124 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) [2022-02-09 03:06:58,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:06:58,051 INFO L93 Difference]: Finished difference Result 14425 states and 63648 transitions. [2022-02-09 03:06:58,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-09 03:06:58,051 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 [2022-02-09 03:06:58,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:06:58,101 INFO L225 Difference]: With dead ends: 14425 [2022-02-09 03:06:58,101 INFO L226 Difference]: Without dead ends: 14274 [2022-02-09 03:06:58,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=450, Invalid=3582, Unknown=0, NotChecked=0, Total=4032 [2022-02-09 03:06:58,101 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 756 mSDsluCounter, 3232 mSDsCounter, 0 mSdLazyCounter, 4186 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.9s IncrementalHoareTripleChecker+Time [2022-02-09 03:06:58,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 1349 Invalid, 4285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 4186 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-09 03:06:58,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14274 states. [2022-02-09 03:06:58,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14274 to 11508. [2022-02-09 03:06:58,373 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) [2022-02-09 03:06:58,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11508 states to 11508 states and 52492 transitions. [2022-02-09 03:06:58,418 INFO L78 Accepts]: Start accepts. Automaton has 11508 states and 52492 transitions. Word has length 33 [2022-02-09 03:06:58,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:06:58,419 INFO L470 AbstractCegarLoop]: Abstraction has 11508 states and 52492 transitions. [2022-02-09 03:06:58,419 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) [2022-02-09 03:06:58,419 INFO L276 IsEmpty]: Start isEmpty. Operand 11508 states and 52492 transitions. [2022-02-09 03:06:58,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:06:58,444 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:06:58,444 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] [2022-02-09 03:06:58,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-02-09 03:06:58,658 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 [2022-02-09 03:06:58,658 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:06:58,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:06:58,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1505540643, now seen corresponding path program 69 times [2022-02-09 03:06:58,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:06:58,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630250592] [2022-02-09 03:06:58,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:06:58,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:06:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:06:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:58,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:06:58,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630250592] [2022-02-09 03:06:58,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630250592] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:06:58,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749031451] [2022-02-09 03:06:58,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:06:58,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:06:58,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:06:58,855 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) [2022-02-09 03:06:58,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-02-09 03:06:58,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-09 03:06:58,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:06:58,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-09 03:06:58,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:06:59,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:06:59,198 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-09 03:06:59,198 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 [2022-02-09 03:06:59,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:59,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:06:59,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:06:59,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749031451] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:06:59,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:06:59,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2022-02-09 03:06:59,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490142144] [2022-02-09 03:06:59,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:06:59,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:06:59,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:06:59,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:06:59,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:06:59,800 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) [2022-02-09 03:07:04,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:07:04,977 INFO L93 Difference]: Finished difference Result 15526 states and 68442 transitions. [2022-02-09 03:07:04,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-09 03:07:04,978 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 [2022-02-09 03:07:04,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:07:05,032 INFO L225 Difference]: With dead ends: 15526 [2022-02-09 03:07:05,032 INFO L226 Difference]: Without dead ends: 15462 [2022-02-09 03:07:05,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2848 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=809, Invalid=9091, Unknown=0, NotChecked=0, Total=9900 [2022-02-09 03:07:05,034 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 1141 mSDsluCounter, 5019 mSDsCounter, 0 mSdLazyCounter, 6419 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s 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, 2.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:07:05,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1141 Valid, 2129 Invalid, 6647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 6419 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-09 03:07:05,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15462 states. [2022-02-09 03:07:05,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15462 to 11922. [2022-02-09 03:07:05,350 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) [2022-02-09 03:07:05,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11922 states to 11922 states and 54708 transitions. [2022-02-09 03:07:05,398 INFO L78 Accepts]: Start accepts. Automaton has 11922 states and 54708 transitions. Word has length 33 [2022-02-09 03:07:05,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:07:05,398 INFO L470 AbstractCegarLoop]: Abstraction has 11922 states and 54708 transitions. [2022-02-09 03:07:05,398 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) [2022-02-09 03:07:05,398 INFO L276 IsEmpty]: Start isEmpty. Operand 11922 states and 54708 transitions. [2022-02-09 03:07:05,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:07:05,424 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:07:05,424 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] [2022-02-09 03:07:05,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-02-09 03:07:05,639 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 [2022-02-09 03:07:05,639 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:07:05,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:07:05,640 INFO L85 PathProgramCache]: Analyzing trace with hash 569915123, now seen corresponding path program 70 times [2022-02-09 03:07:05,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:07:05,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481755830] [2022-02-09 03:07:05,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:07:05,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:07:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:07:05,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:05,826 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:07:05,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481755830] [2022-02-09 03:07:05,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481755830] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:07:05,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207709237] [2022-02-09 03:07:05,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:07:05,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:07:05,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:07:05,827 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) [2022-02-09 03:07:05,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-02-09 03:07:05,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:07:05,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:07:05,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:07:05,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:07:06,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:07:06,238 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 [2022-02-09 03:07:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:06,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:07:06,640 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:07:06,641 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 [2022-02-09 03:07:06,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:07:06,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:07:06,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:07:06,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:07:06,701 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 [2022-02-09 03:07:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:06,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207709237] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:07:06,745 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:07:06,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:07:06,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840941530] [2022-02-09 03:07:06,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:07:06,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:07:06,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:07:06,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:07:06,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:07:06,746 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) [2022-02-09 03:07:09,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:07:09,571 INFO L93 Difference]: Finished difference Result 13028 states and 59162 transitions. [2022-02-09 03:07:09,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-09 03:07:09,571 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 [2022-02-09 03:07:09,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:07:09,614 INFO L225 Difference]: With dead ends: 13028 [2022-02-09 03:07:09,614 INFO L226 Difference]: Without dead ends: 12998 [2022-02-09 03:07:09,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=375, Invalid=4047, Unknown=0, NotChecked=0, Total=4422 [2022-02-09 03:07:09,614 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 484 mSDsluCounter, 3200 mSDsCounter, 0 mSdLazyCounter, 4281 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:07:09,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 1356 Invalid, 4348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 4281 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-09 03:07:09,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12998 states. [2022-02-09 03:07:09,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12998 to 11924. [2022-02-09 03:07:09,838 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) [2022-02-09 03:07:09,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11924 states to 11924 states and 54717 transitions. [2022-02-09 03:07:09,881 INFO L78 Accepts]: Start accepts. Automaton has 11924 states and 54717 transitions. Word has length 33 [2022-02-09 03:07:09,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:07:09,881 INFO L470 AbstractCegarLoop]: Abstraction has 11924 states and 54717 transitions. [2022-02-09 03:07:09,881 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) [2022-02-09 03:07:09,881 INFO L276 IsEmpty]: Start isEmpty. Operand 11924 states and 54717 transitions. [2022-02-09 03:07:09,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:07:09,907 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:07:09,907 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] [2022-02-09 03:07:09,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-02-09 03:07:10,122 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 [2022-02-09 03:07:10,123 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:07:10,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:07:10,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1003944469, now seen corresponding path program 71 times [2022-02-09 03:07:10,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:07:10,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338643025] [2022-02-09 03:07:10,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:07:10,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:07:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:07:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:10,359 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:07:10,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338643025] [2022-02-09 03:07:10,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338643025] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:07:10,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972777971] [2022-02-09 03:07:10,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:07:10,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:07:10,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:07:10,372 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) [2022-02-09 03:07:10,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-02-09 03:07:10,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-09 03:07:10,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:07:10,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:07:10,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:07:10,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:07:10,772 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 [2022-02-09 03:07:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:10,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:07:11,141 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:07:11,142 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 [2022-02-09 03:07:11,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:07:11,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:07:11,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:07:11,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:07:11,176 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 [2022-02-09 03:07:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:11,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972777971] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:07:11,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:07:11,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:07:11,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363967196] [2022-02-09 03:07:11,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:07:11,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:07:11,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:07:11,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:07:11,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:07:11,211 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) [2022-02-09 03:07:14,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:07:14,216 INFO L93 Difference]: Finished difference Result 14210 states and 63649 transitions. [2022-02-09 03:07:14,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-09 03:07:14,217 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 [2022-02-09 03:07:14,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:07:14,265 INFO L225 Difference]: With dead ends: 14210 [2022-02-09 03:07:14,265 INFO L226 Difference]: Without dead ends: 14151 [2022-02-09 03:07:14,266 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 [2022-02-09 03:07:14,266 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 595 mSDsluCounter, 4139 mSDsCounter, 0 mSdLazyCounter, 5535 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.9s IncrementalHoareTripleChecker+Time [2022-02-09 03:07:14,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [595 Valid, 1726 Invalid, 5619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 5535 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-09 03:07:14,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14151 states. [2022-02-09 03:07:14,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14151 to 11925. [2022-02-09 03:07:14,584 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) [2022-02-09 03:07:14,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11925 states to 11925 states and 54725 transitions. [2022-02-09 03:07:14,631 INFO L78 Accepts]: Start accepts. Automaton has 11925 states and 54725 transitions. Word has length 33 [2022-02-09 03:07:14,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:07:14,631 INFO L470 AbstractCegarLoop]: Abstraction has 11925 states and 54725 transitions. [2022-02-09 03:07:14,631 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) [2022-02-09 03:07:14,631 INFO L276 IsEmpty]: Start isEmpty. Operand 11925 states and 54725 transitions. [2022-02-09 03:07:14,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:07:14,657 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:07:14,657 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] [2022-02-09 03:07:14,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-02-09 03:07:14,873 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 [2022-02-09 03:07:14,873 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:07:14,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:07:14,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1425999091, now seen corresponding path program 72 times [2022-02-09 03:07:14,874 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:07:14,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780574983] [2022-02-09 03:07:14,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:07:14,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:07:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:07:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:15,073 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:07:15,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780574983] [2022-02-09 03:07:15,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780574983] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:07:15,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386534846] [2022-02-09 03:07:15,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:07:15,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:07:15,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:07:15,074 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) [2022-02-09 03:07:15,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-02-09 03:07:15,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-09 03:07:15,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:07:15,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:07:15,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:07:15,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:07:15,401 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-09 03:07:15,401 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 [2022-02-09 03:07:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:15,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:07:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:15,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386534846] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:07:15,978 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:07:15,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-02-09 03:07:15,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977704231] [2022-02-09 03:07:15,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:07:15,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:07:15,978 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:07:15,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:07:15,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:07:15,979 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) [2022-02-09 03:07:20,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:07:20,639 INFO L93 Difference]: Finished difference Result 15371 states and 68303 transitions. [2022-02-09 03:07:20,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-09 03:07:20,639 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 [2022-02-09 03:07:20,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:07:20,693 INFO L225 Difference]: With dead ends: 15371 [2022-02-09 03:07:20,693 INFO L226 Difference]: Without dead ends: 15301 [2022-02-09 03:07:20,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2150 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=827, Invalid=6829, Unknown=0, NotChecked=0, Total=7656 [2022-02-09 03:07:20,694 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1188 mSDsluCounter, 3777 mSDsCounter, 0 mSdLazyCounter, 4986 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-02-09 03:07:20,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1188 Valid, 1531 Invalid, 5235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 4986 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-09 03:07:20,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15301 states. [2022-02-09 03:07:21,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15301 to 12325. [2022-02-09 03:07:21,265 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) [2022-02-09 03:07:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12325 states to 12325 states and 56691 transitions. [2022-02-09 03:07:21,331 INFO L78 Accepts]: Start accepts. Automaton has 12325 states and 56691 transitions. Word has length 33 [2022-02-09 03:07:21,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:07:21,331 INFO L470 AbstractCegarLoop]: Abstraction has 12325 states and 56691 transitions. [2022-02-09 03:07:21,331 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) [2022-02-09 03:07:21,331 INFO L276 IsEmpty]: Start isEmpty. Operand 12325 states and 56691 transitions. [2022-02-09 03:07:21,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:07:21,367 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:07:21,367 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] [2022-02-09 03:07:21,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-02-09 03:07:21,583 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 [2022-02-09 03:07:21,583 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:07:21,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:07:21,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1565695599, now seen corresponding path program 73 times [2022-02-09 03:07:21,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:07:21,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705651038] [2022-02-09 03:07:21,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:07:21,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:07:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:07:21,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:21,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:07:21,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705651038] [2022-02-09 03:07:21,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705651038] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:07:21,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520972139] [2022-02-09 03:07:21,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:07:21,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:07:21,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:07:21,791 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) [2022-02-09 03:07:21,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-02-09 03:07:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:07:21,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:07:21,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:07:22,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:07:22,096 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 [2022-02-09 03:07:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:22,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:07:22,496 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:07:22,496 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 [2022-02-09 03:07:22,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:07:22,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:07:22,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:07:22,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:07:22,556 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 [2022-02-09 03:07:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:22,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520972139] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:07:22,602 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:07:22,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-02-09 03:07:22,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959377735] [2022-02-09 03:07:22,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:07:22,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-09 03:07:22,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:07:22,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-09 03:07:22,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-02-09 03:07:22,603 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) [2022-02-09 03:07:24,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:07:24,963 INFO L93 Difference]: Finished difference Result 15305 states and 68662 transitions. [2022-02-09 03:07:24,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-09 03:07:24,964 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 [2022-02-09 03:07:24,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:07:25,018 INFO L225 Difference]: With dead ends: 15305 [2022-02-09 03:07:25,018 INFO L226 Difference]: Without dead ends: 15253 [2022-02-09 03:07:25,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=547, Invalid=3743, Unknown=0, NotChecked=0, Total=4290 [2022-02-09 03:07:25,019 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 759 mSDsluCounter, 2512 mSDsCounter, 0 mSdLazyCounter, 2860 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-02-09 03:07:25,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [759 Valid, 994 Invalid, 3492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2860 Invalid, 0 Unknown, 499 Unchecked, 1.3s Time] [2022-02-09 03:07:25,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15253 states. [2022-02-09 03:07:25,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15253 to 12871. [2022-02-09 03:07:25,400 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) [2022-02-09 03:07:25,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12871 states to 12871 states and 59222 transitions. [2022-02-09 03:07:25,452 INFO L78 Accepts]: Start accepts. Automaton has 12871 states and 59222 transitions. Word has length 33 [2022-02-09 03:07:25,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:07:25,452 INFO L470 AbstractCegarLoop]: Abstraction has 12871 states and 59222 transitions. [2022-02-09 03:07:25,452 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) [2022-02-09 03:07:25,452 INFO L276 IsEmpty]: Start isEmpty. Operand 12871 states and 59222 transitions. [2022-02-09 03:07:25,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:07:25,484 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:07:25,484 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] [2022-02-09 03:07:25,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2022-02-09 03:07:25,699 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 [2022-02-09 03:07:25,700 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:07:25,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:07:25,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1619082119, now seen corresponding path program 74 times [2022-02-09 03:07:25,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:07:25,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141219435] [2022-02-09 03:07:25,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:07:25,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:07:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:07:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:25,911 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:07:25,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141219435] [2022-02-09 03:07:25,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141219435] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:07:25,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555239707] [2022-02-09 03:07:25,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:07:25,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:07:25,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:07:25,912 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) [2022-02-09 03:07:25,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-02-09 03:07:25,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:07:25,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:07:25,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:07:25,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:07:26,252 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:07:26,253 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 [2022-02-09 03:07:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:26,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:07:27,025 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:07:27,025 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 [2022-02-09 03:07:27,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:07:27,032 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-02-09 03:07:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:27,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555239707] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:07:27,069 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:07:27,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 29 [2022-02-09 03:07:27,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971423796] [2022-02-09 03:07:27,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:07:27,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-09 03:07:27,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:07:27,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-09 03:07:27,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-02-09 03:07:27,070 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) [2022-02-09 03:07:28,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:07:28,764 INFO L93 Difference]: Finished difference Result 13881 states and 63291 transitions. [2022-02-09 03:07:28,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-09 03:07:28,764 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 [2022-02-09 03:07:28,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:07:28,820 INFO L225 Difference]: With dead ends: 13881 [2022-02-09 03:07:28,821 INFO L226 Difference]: Without dead ends: 13860 [2022-02-09 03:07:28,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=372, Invalid=2280, Unknown=0, NotChecked=0, Total=2652 [2022-02-09 03:07:28,821 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 [2022-02-09 03:07:28,821 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] [2022-02-09 03:07:28,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13860 states. [2022-02-09 03:07:29,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13860 to 12916. [2022-02-09 03:07:29,150 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) [2022-02-09 03:07:29,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12916 states to 12916 states and 59395 transitions. [2022-02-09 03:07:29,202 INFO L78 Accepts]: Start accepts. Automaton has 12916 states and 59395 transitions. Word has length 33 [2022-02-09 03:07:29,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:07:29,202 INFO L470 AbstractCegarLoop]: Abstraction has 12916 states and 59395 transitions. [2022-02-09 03:07:29,202 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) [2022-02-09 03:07:29,202 INFO L276 IsEmpty]: Start isEmpty. Operand 12916 states and 59395 transitions. [2022-02-09 03:07:29,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:07:29,232 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:07:29,232 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] [2022-02-09 03:07:29,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-02-09 03:07:29,449 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 [2022-02-09 03:07:29,449 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:07:29,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:07:29,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1912485126, now seen corresponding path program 1 times [2022-02-09 03:07:29,449 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:07:29,449 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596917788] [2022-02-09 03:07:29,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:07:29,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:07:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:07:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:29,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:07:29,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596917788] [2022-02-09 03:07:29,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596917788] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:07:29,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83888235] [2022-02-09 03:07:29,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:07:29,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:07:29,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:07:29,873 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) [2022-02-09 03:07:29,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-02-09 03:07:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:07:29,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:07:29,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:07:30,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:07:30,183 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 [2022-02-09 03:07:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:30,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:07:30,471 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:07:30,471 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 [2022-02-09 03:07:30,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:07:30,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:07:30,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:07:30,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:07:30,523 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 [2022-02-09 03:07:30,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:30,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83888235] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:07:30,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:07:30,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-02-09 03:07:30,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069039808] [2022-02-09 03:07:30,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:07:30,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-09 03:07:30,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:07:30,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-09 03:07:30,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-02-09 03:07:30,556 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) [2022-02-09 03:07:32,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:07:32,386 INFO L93 Difference]: Finished difference Result 15368 states and 68891 transitions. [2022-02-09 03:07:32,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-09 03:07:32,387 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 [2022-02-09 03:07:32,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:07:32,450 INFO L225 Difference]: With dead ends: 15368 [2022-02-09 03:07:32,451 INFO L226 Difference]: Without dead ends: 15311 [2022-02-09 03:07:32,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=544, Invalid=3616, Unknown=0, NotChecked=0, Total=4160 [2022-02-09 03:07:32,462 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 615 mSDsluCounter, 3027 mSDsCounter, 0 mSdLazyCounter, 3292 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-02-09 03:07:32,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 1215 Invalid, 3991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 3292 Invalid, 0 Unknown, 575 Unchecked, 1.0s Time] [2022-02-09 03:07:32,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15311 states. [2022-02-09 03:07:32,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15311 to 12960. [2022-02-09 03:07:32,790 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) [2022-02-09 03:07:32,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12960 states to 12960 states and 59528 transitions. [2022-02-09 03:07:32,842 INFO L78 Accepts]: Start accepts. Automaton has 12960 states and 59528 transitions. Word has length 33 [2022-02-09 03:07:32,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:07:32,842 INFO L470 AbstractCegarLoop]: Abstraction has 12960 states and 59528 transitions. [2022-02-09 03:07:32,842 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) [2022-02-09 03:07:32,842 INFO L276 IsEmpty]: Start isEmpty. Operand 12960 states and 59528 transitions. [2022-02-09 03:07:32,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:07:32,876 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:07:32,876 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] [2022-02-09 03:07:32,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-02-09 03:07:33,097 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 [2022-02-09 03:07:33,097 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:07:33,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:07:33,098 INFO L85 PathProgramCache]: Analyzing trace with hash 501733676, now seen corresponding path program 8 times [2022-02-09 03:07:33,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:07:33,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483941218] [2022-02-09 03:07:33,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:07:33,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:07:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:07:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:33,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:07:33,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483941218] [2022-02-09 03:07:33,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483941218] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:07:33,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005274521] [2022-02-09 03:07:33,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:07:33,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:07:33,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:07:33,240 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) [2022-02-09 03:07:33,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-02-09 03:07:33,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:07:33,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:07:33,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:07:33,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:07:33,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:07:33,482 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 [2022-02-09 03:07:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:34,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:07:34,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:07:34,211 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 [2022-02-09 03:07:34,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:07:34,217 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 [2022-02-09 03:07:34,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:34,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005274521] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:07:34,247 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:07:34,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 29 [2022-02-09 03:07:34,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780802371] [2022-02-09 03:07:34,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:07:34,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-09 03:07:34,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:07:34,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-09 03:07:34,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-02-09 03:07:34,248 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) [2022-02-09 03:07:35,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:07:35,915 INFO L93 Difference]: Finished difference Result 14238 states and 64285 transitions. [2022-02-09 03:07:35,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-09 03:07:35,915 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 [2022-02-09 03:07:35,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:07:35,962 INFO L225 Difference]: With dead ends: 14238 [2022-02-09 03:07:35,962 INFO L226 Difference]: Without dead ends: 14219 [2022-02-09 03:07:35,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=402, Invalid=2568, Unknown=0, NotChecked=0, Total=2970 [2022-02-09 03:07:35,962 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, 0.9s IncrementalHoareTripleChecker+Time [2022-02-09 03:07:35,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 940 Invalid, 3332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2646 Invalid, 0 Unknown, 586 Unchecked, 0.9s Time] [2022-02-09 03:07:35,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14219 states. [2022-02-09 03:07:36,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14219 to 12999. [2022-02-09 03:07:36,239 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) [2022-02-09 03:07:36,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12999 states to 12999 states and 59660 transitions. [2022-02-09 03:07:36,289 INFO L78 Accepts]: Start accepts. Automaton has 12999 states and 59660 transitions. Word has length 33 [2022-02-09 03:07:36,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:07:36,289 INFO L470 AbstractCegarLoop]: Abstraction has 12999 states and 59660 transitions. [2022-02-09 03:07:36,289 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) [2022-02-09 03:07:36,289 INFO L276 IsEmpty]: Start isEmpty. Operand 12999 states and 59660 transitions. [2022-02-09 03:07:36,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:07:36,318 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:07:36,318 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] [2022-02-09 03:07:36,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-02-09 03:07:36,531 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 [2022-02-09 03:07:36,531 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:07:36,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:07:36,532 INFO L85 PathProgramCache]: Analyzing trace with hash 644860661, now seen corresponding path program 75 times [2022-02-09 03:07:36,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:07:36,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694755196] [2022-02-09 03:07:36,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:07:36,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:07:36,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:07:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:36,698 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:07:36,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694755196] [2022-02-09 03:07:36,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694755196] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:07:36,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917531102] [2022-02-09 03:07:36,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:07:36,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:07:36,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:07:36,701 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) [2022-02-09 03:07:36,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-02-09 03:07:36,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-09 03:07:36,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:07:36,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:07:36,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:07:36,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:07:36,965 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-02-09 03:07:36,965 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 [2022-02-09 03:07:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:37,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:07:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-09 03:07:37,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917531102] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:07:37,503 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:07:37,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 11] total 29 [2022-02-09 03:07:37,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114656667] [2022-02-09 03:07:37,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:07:37,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-09 03:07:37,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:07:37,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-09 03:07:37,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2022-02-09 03:07:37,504 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) [2022-02-09 03:07:40,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:07:40,383 INFO L93 Difference]: Finished difference Result 15716 states and 70456 transitions. [2022-02-09 03:07:40,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-09 03:07:40,383 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 [2022-02-09 03:07:40,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:07:40,453 INFO L225 Difference]: With dead ends: 15716 [2022-02-09 03:07:40,453 INFO L226 Difference]: Without dead ends: 15684 [2022-02-09 03:07:40,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=717, Invalid=5289, Unknown=0, NotChecked=0, Total=6006 [2022-02-09 03:07:40,454 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 895 mSDsluCounter, 3552 mSDsCounter, 0 mSdLazyCounter, 4844 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:07:40,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [895 Valid, 1482 Invalid, 5031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 4844 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-09 03:07:40,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15684 states. [2022-02-09 03:07:40,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15684 to 13483. [2022-02-09 03:07:40,920 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) [2022-02-09 03:07:40,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13483 states to 13483 states and 62065 transitions. [2022-02-09 03:07:40,970 INFO L78 Accepts]: Start accepts. Automaton has 13483 states and 62065 transitions. Word has length 33 [2022-02-09 03:07:40,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:07:40,971 INFO L470 AbstractCegarLoop]: Abstraction has 13483 states and 62065 transitions. [2022-02-09 03:07:40,971 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) [2022-02-09 03:07:40,971 INFO L276 IsEmpty]: Start isEmpty. Operand 13483 states and 62065 transitions. [2022-02-09 03:07:41,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:07:41,001 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:07:41,001 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] [2022-02-09 03:07:41,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-02-09 03:07:41,207 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 [2022-02-09 03:07:41,208 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:07:41,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:07:41,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1998066250, now seen corresponding path program 9 times [2022-02-09 03:07:41,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:07:41,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643677491] [2022-02-09 03:07:41,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:07:41,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:07:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:07:41,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:41,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:07:41,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643677491] [2022-02-09 03:07:41,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643677491] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:07:41,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63967336] [2022-02-09 03:07:41,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:07:41,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:07:41,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:07:41,417 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) [2022-02-09 03:07:41,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-02-09 03:07:41,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-09 03:07:41,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:07:41,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:07:41,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:07:41,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:07:41,770 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-09 03:07:41,770 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 [2022-02-09 03:07:42,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:42,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:07:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-09 03:07:42,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63967336] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:07:42,343 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:07:42,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 30 [2022-02-09 03:07:42,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60486385] [2022-02-09 03:07:42,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:07:42,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-09 03:07:42,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:07:42,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-09 03:07:42,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-02-09 03:07:42,344 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) [2022-02-09 03:07:46,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:07:46,429 INFO L93 Difference]: Finished difference Result 15794 states and 70966 transitions. [2022-02-09 03:07:46,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-09 03:07:46,429 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 [2022-02-09 03:07:46,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:07:46,485 INFO L225 Difference]: With dead ends: 15794 [2022-02-09 03:07:46,486 INFO L226 Difference]: Without dead ends: 15717 [2022-02-09 03:07:46,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1911 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=738, Invalid=6068, Unknown=0, NotChecked=0, Total=6806 [2022-02-09 03:07:46,487 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 996 mSDsluCounter, 3484 mSDsCounter, 0 mSdLazyCounter, 4654 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.1s IncrementalHoareTripleChecker+Time [2022-02-09 03:07:46,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [996 Valid, 1439 Invalid, 4888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 4654 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-09 03:07:46,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15717 states. [2022-02-09 03:07:46,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15717 to 13475. [2022-02-09 03:07:46,867 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) [2022-02-09 03:07:46,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13475 states to 13475 states and 62034 transitions. [2022-02-09 03:07:46,920 INFO L78 Accepts]: Start accepts. Automaton has 13475 states and 62034 transitions. Word has length 33 [2022-02-09 03:07:46,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:07:46,920 INFO L470 AbstractCegarLoop]: Abstraction has 13475 states and 62034 transitions. [2022-02-09 03:07:46,920 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) [2022-02-09 03:07:46,920 INFO L276 IsEmpty]: Start isEmpty. Operand 13475 states and 62034 transitions. [2022-02-09 03:07:46,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:07:46,952 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:07:46,952 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] [2022-02-09 03:07:46,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-02-09 03:07:47,168 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 [2022-02-09 03:07:47,168 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:07:47,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:07:47,169 INFO L85 PathProgramCache]: Analyzing trace with hash 404844174, now seen corresponding path program 2 times [2022-02-09 03:07:47,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:07:47,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719103245] [2022-02-09 03:07:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:07:47,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:07:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:07:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:47,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:07:47,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719103245] [2022-02-09 03:07:47,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719103245] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:07:47,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594837753] [2022-02-09 03:07:47,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:07:47,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:07:47,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:07:47,432 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) [2022-02-09 03:07:47,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-02-09 03:07:47,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:07:47,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:07:47,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:07:47,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:07:47,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:07:47,777 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 [2022-02-09 03:07:48,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:48,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:07:48,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:07:48,627 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 [2022-02-09 03:07:48,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:07:48,637 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 [2022-02-09 03:07:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:48,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594837753] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:07:48,690 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:07:48,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 29 [2022-02-09 03:07:48,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325664822] [2022-02-09 03:07:48,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:07:48,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-09 03:07:48,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:07:48,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-09 03:07:48,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-02-09 03:07:48,691 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) [2022-02-09 03:07:50,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:07:50,823 INFO L93 Difference]: Finished difference Result 14582 states and 66324 transitions. [2022-02-09 03:07:50,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-09 03:07:50,824 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 [2022-02-09 03:07:50,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:07:50,879 INFO L225 Difference]: With dead ends: 14582 [2022-02-09 03:07:50,879 INFO L226 Difference]: Without dead ends: 14545 [2022-02-09 03:07:50,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=416, Invalid=2554, Unknown=0, NotChecked=0, Total=2970 [2022-02-09 03:07:50,880 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 636 mSDsluCounter, 2472 mSDsCounter, 0 mSdLazyCounter, 2699 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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 [2022-02-09 03:07:50,880 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] [2022-02-09 03:07:50,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14545 states. [2022-02-09 03:07:51,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14545 to 13439. [2022-02-09 03:07:51,264 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) [2022-02-09 03:07:51,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13439 states to 13439 states and 61895 transitions. [2022-02-09 03:07:51,319 INFO L78 Accepts]: Start accepts. Automaton has 13439 states and 61895 transitions. Word has length 33 [2022-02-09 03:07:51,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:07:51,319 INFO L470 AbstractCegarLoop]: Abstraction has 13439 states and 61895 transitions. [2022-02-09 03:07:51,319 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) [2022-02-09 03:07:51,319 INFO L276 IsEmpty]: Start isEmpty. Operand 13439 states and 61895 transitions. [2022-02-09 03:07:51,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:07:51,352 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:07:51,352 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] [2022-02-09 03:07:51,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-02-09 03:07:51,569 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 [2022-02-09 03:07:51,569 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:07:51,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:07:51,570 INFO L85 PathProgramCache]: Analyzing trace with hash -85793105, now seen corresponding path program 76 times [2022-02-09 03:07:51,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:07:51,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595078712] [2022-02-09 03:07:51,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:07:51,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:07:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:07:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:51,992 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:07:51,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595078712] [2022-02-09 03:07:51,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595078712] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:07:51,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692065668] [2022-02-09 03:07:51,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:07:51,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:07:51,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:07:51,993 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) [2022-02-09 03:07:51,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-02-09 03:07:52,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:07:52,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:07:52,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:07:52,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:07:52,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:07:52,347 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 37 treesize of output 21 [2022-02-09 03:07:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:52,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:07:52,751 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:07:52,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-02-09 03:07:52,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:07:52,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:07:52,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:07:52,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:07:52,820 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 [2022-02-09 03:07:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:52,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692065668] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:07:52,865 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:07:52,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-09 03:07:52,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459695027] [2022-02-09 03:07:52,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:07:52,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:07:52,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:07:52,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:07:52,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:07:52,866 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) [2022-02-09 03:07:55,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:07:55,947 INFO L93 Difference]: Finished difference Result 15258 states and 69034 transitions. [2022-02-09 03:07:55,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-09 03:07:55,947 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 [2022-02-09 03:07:55,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:07:56,003 INFO L225 Difference]: With dead ends: 15258 [2022-02-09 03:07:56,003 INFO L226 Difference]: Without dead ends: 15188 [2022-02-09 03:07:56,004 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 [2022-02-09 03:07:56,004 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 682 mSDsluCounter, 3470 mSDsCounter, 0 mSdLazyCounter, 4498 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:07:56,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 1390 Invalid, 4648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 4498 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-09 03:07:56,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15188 states. [2022-02-09 03:07:56,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15188 to 13495. [2022-02-09 03:07:56,355 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) [2022-02-09 03:07:56,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13495 states to 13495 states and 62179 transitions. [2022-02-09 03:07:56,419 INFO L78 Accepts]: Start accepts. Automaton has 13495 states and 62179 transitions. Word has length 33 [2022-02-09 03:07:56,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:07:56,419 INFO L470 AbstractCegarLoop]: Abstraction has 13495 states and 62179 transitions. [2022-02-09 03:07:56,419 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) [2022-02-09 03:07:56,419 INFO L276 IsEmpty]: Start isEmpty. Operand 13495 states and 62179 transitions. [2022-02-09 03:07:56,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:07:56,450 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:07:56,450 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] [2022-02-09 03:07:56,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-02-09 03:07:56,663 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 [2022-02-09 03:07:56,663 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:07:56,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:07:56,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1217129040, now seen corresponding path program 10 times [2022-02-09 03:07:56,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:07:56,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134781905] [2022-02-09 03:07:56,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:07:56,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:07:56,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:07:56,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:56,832 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:07:56,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134781905] [2022-02-09 03:07:56,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134781905] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:07:56,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596207534] [2022-02-09 03:07:56,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:07:56,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:07:56,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:07:56,834 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) [2022-02-09 03:07:56,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-02-09 03:07:56,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:07:56,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:07:56,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:07:56,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:07:57,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:07:57,099 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 [2022-02-09 03:07:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:57,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:07:57,374 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:07:57,374 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 [2022-02-09 03:07:57,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:07:57,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:07:57,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:07:57,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:07:57,428 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 [2022-02-09 03:07:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:07:57,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596207534] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:07:57,463 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:07:57,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-02-09 03:07:57,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874655490] [2022-02-09 03:07:57,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:07:57,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-09 03:07:57,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:07:57,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-09 03:07:57,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-02-09 03:07:57,464 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) [2022-02-09 03:07:59,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:07:59,366 INFO L93 Difference]: Finished difference Result 15253 states and 68928 transitions. [2022-02-09 03:07:59,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-09 03:07:59,367 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 [2022-02-09 03:07:59,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:07:59,428 INFO L225 Difference]: With dead ends: 15253 [2022-02-09 03:07:59,428 INFO L226 Difference]: Without dead ends: 15117 [2022-02-09 03:07:59,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=544, Invalid=4148, Unknown=0, NotChecked=0, Total=4692 [2022-02-09 03:07:59,429 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 714 mSDsluCounter, 2597 mSDsCounter, 0 mSdLazyCounter, 3290 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-02-09 03:07:59,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 1056 Invalid, 3433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 3290 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-09 03:07:59,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15117 states. [2022-02-09 03:07:59,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15117 to 13368. [2022-02-09 03:07:59,800 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) [2022-02-09 03:07:59,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13368 states to 13368 states and 61668 transitions. [2022-02-09 03:07:59,855 INFO L78 Accepts]: Start accepts. Automaton has 13368 states and 61668 transitions. Word has length 33 [2022-02-09 03:07:59,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:07:59,855 INFO L470 AbstractCegarLoop]: Abstraction has 13368 states and 61668 transitions. [2022-02-09 03:07:59,855 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) [2022-02-09 03:07:59,855 INFO L276 IsEmpty]: Start isEmpty. Operand 13368 states and 61668 transitions. [2022-02-09 03:07:59,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:07:59,887 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:07:59,888 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] [2022-02-09 03:07:59,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-02-09 03:08:00,101 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 [2022-02-09 03:08:00,101 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:08:00,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:08:00,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1950848000, now seen corresponding path program 11 times [2022-02-09 03:08:00,102 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:08:00,102 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553968944] [2022-02-09 03:08:00,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:08:00,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:08:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:08:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:00,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:08:00,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553968944] [2022-02-09 03:08:00,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553968944] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:08:00,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238262534] [2022-02-09 03:08:00,366 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:08:00,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:08:00,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:08:00,367 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) [2022-02-09 03:08:00,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-02-09 03:08:00,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-09 03:08:00,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:08:00,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:08:00,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:08:00,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:08:00,706 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 [2022-02-09 03:08:00,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:00,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:08:01,112 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:08:01,112 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 [2022-02-09 03:08:01,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:08:01,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:08:01,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:08:01,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:08:01,167 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 [2022-02-09 03:08:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:01,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238262534] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:08:01,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:08:01,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:08:01,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298624059] [2022-02-09 03:08:01,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:08:01,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:08:01,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:08:01,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:08:01,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:08:01,211 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) [2022-02-09 03:08:05,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:08:05,838 INFO L93 Difference]: Finished difference Result 17311 states and 76331 transitions. [2022-02-09 03:08:05,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-09 03:08:05,838 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 [2022-02-09 03:08:05,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:08:05,900 INFO L225 Difference]: With dead ends: 17311 [2022-02-09 03:08:05,901 INFO L226 Difference]: Without dead ends: 17195 [2022-02-09 03:08:05,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3001 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1134, Invalid=8178, Unknown=0, NotChecked=0, Total=9312 [2022-02-09 03:08:05,901 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 [2022-02-09 03:08:05,902 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] [2022-02-09 03:08:05,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17195 states. [2022-02-09 03:08:06,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17195 to 13877. [2022-02-09 03:08:06,304 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) [2022-02-09 03:08:06,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13877 states to 13877 states and 64044 transitions. [2022-02-09 03:08:06,363 INFO L78 Accepts]: Start accepts. Automaton has 13877 states and 64044 transitions. Word has length 33 [2022-02-09 03:08:06,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:08:06,363 INFO L470 AbstractCegarLoop]: Abstraction has 13877 states and 64044 transitions. [2022-02-09 03:08:06,363 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) [2022-02-09 03:08:06,363 INFO L276 IsEmpty]: Start isEmpty. Operand 13877 states and 64044 transitions. [2022-02-09 03:08:06,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:08:06,399 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:08:06,399 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] [2022-02-09 03:08:06,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2022-02-09 03:08:06,615 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 [2022-02-09 03:08:06,615 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:08:06,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:08:06,616 INFO L85 PathProgramCache]: Analyzing trace with hash 154751753, now seen corresponding path program 77 times [2022-02-09 03:08:06,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:08:06,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135636076] [2022-02-09 03:08:06,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:08:06,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:08:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:08:06,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:06,857 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:08:06,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135636076] [2022-02-09 03:08:06,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135636076] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:08:06,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915067071] [2022-02-09 03:08:06,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:08:06,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:08:06,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:08:06,858 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) [2022-02-09 03:08:06,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-02-09 03:08:06,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-09 03:08:06,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:08:06,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:08:06,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:08:07,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:08:07,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-02-09 03:08:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:07,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:08:07,603 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:08:07,604 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 [2022-02-09 03:08:07,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:08:07,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:08:07,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:08:07,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:08:07,677 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 [2022-02-09 03:08:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:07,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915067071] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:08:07,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:08:07,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-09 03:08:07,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087915410] [2022-02-09 03:08:07,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:08:07,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:08:07,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:08:07,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:08:07,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:08:07,725 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) [2022-02-09 03:08:10,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:08:10,957 INFO L93 Difference]: Finished difference Result 16887 states and 74647 transitions. [2022-02-09 03:08:10,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-09 03:08:10,957 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 [2022-02-09 03:08:10,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:08:11,012 INFO L225 Difference]: With dead ends: 16887 [2022-02-09 03:08:11,012 INFO L226 Difference]: Without dead ends: 16688 [2022-02-09 03:08:11,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2231 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=922, Invalid=6218, Unknown=0, NotChecked=0, Total=7140 [2022-02-09 03:08:11,013 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 922 mSDsluCounter, 3156 mSDsCounter, 0 mSdLazyCounter, 3909 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:08:11,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [922 Valid, 1310 Invalid, 4117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 3909 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-09 03:08:11,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16688 states. [2022-02-09 03:08:11,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16688 to 13644. [2022-02-09 03:08:11,411 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) [2022-02-09 03:08:11,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13644 states to 13644 states and 63066 transitions. [2022-02-09 03:08:11,477 INFO L78 Accepts]: Start accepts. Automaton has 13644 states and 63066 transitions. Word has length 33 [2022-02-09 03:08:11,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:08:11,477 INFO L470 AbstractCegarLoop]: Abstraction has 13644 states and 63066 transitions. [2022-02-09 03:08:11,477 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) [2022-02-09 03:08:11,477 INFO L276 IsEmpty]: Start isEmpty. Operand 13644 states and 63066 transitions. [2022-02-09 03:08:11,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:08:11,514 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:08:11,514 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] [2022-02-09 03:08:11,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-02-09 03:08:11,727 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 [2022-02-09 03:08:11,727 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:08:11,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:08:11,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1957996389, now seen corresponding path program 78 times [2022-02-09 03:08:11,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:08:11,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712303753] [2022-02-09 03:08:11,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:08:11,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:08:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:08:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:11,949 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:08:11,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712303753] [2022-02-09 03:08:11,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712303753] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:08:11,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730091806] [2022-02-09 03:08:11,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:08:11,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:08:11,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:08:11,951 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) [2022-02-09 03:08:11,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-02-09 03:08:11,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-09 03:08:11,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:08:11,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:08:11,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:08:12,220 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:08:12,220 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 [2022-02-09 03:08:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:12,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:08:13,315 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:08:13,316 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 [2022-02-09 03:08:13,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:08:13,324 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-02-09 03:08:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:13,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730091806] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:08:13,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:08:13,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-09 03:08:13,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307771110] [2022-02-09 03:08:13,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:08:13,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-09 03:08:13,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:08:13,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-09 03:08:13,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1072, Unknown=1, NotChecked=0, Total=1190 [2022-02-09 03:08:13,366 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) [2022-02-09 03:08:17,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:08:17,715 INFO L93 Difference]: Finished difference Result 16340 states and 72549 transitions. [2022-02-09 03:08:17,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-09 03:08:17,716 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 [2022-02-09 03:08:17,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:08:17,769 INFO L225 Difference]: With dead ends: 16340 [2022-02-09 03:08:17,769 INFO L226 Difference]: Without dead ends: 16295 [2022-02-09 03:08:17,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 50 SyntacticMatches, 14 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=617, Invalid=5234, Unknown=1, NotChecked=0, Total=5852 [2022-02-09 03:08:17,770 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 870 mSDsluCounter, 3755 mSDsCounter, 0 mSdLazyCounter, 3871 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:08:17,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [870 Valid, 1527 Invalid, 4814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 3871 Invalid, 0 Unknown, 830 Unchecked, 1.7s Time] [2022-02-09 03:08:17,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16295 states. [2022-02-09 03:08:18,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16295 to 13990. [2022-02-09 03:08:18,141 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) [2022-02-09 03:08:18,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13990 states to 13990 states and 64510 transitions. [2022-02-09 03:08:18,196 INFO L78 Accepts]: Start accepts. Automaton has 13990 states and 64510 transitions. Word has length 33 [2022-02-09 03:08:18,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:08:18,196 INFO L470 AbstractCegarLoop]: Abstraction has 13990 states and 64510 transitions. [2022-02-09 03:08:18,196 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) [2022-02-09 03:08:18,196 INFO L276 IsEmpty]: Start isEmpty. Operand 13990 states and 64510 transitions. [2022-02-09 03:08:18,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:08:18,229 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:08:18,229 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] [2022-02-09 03:08:18,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-02-09 03:08:18,443 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 [2022-02-09 03:08:18,443 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:08:18,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:08:18,444 INFO L85 PathProgramCache]: Analyzing trace with hash 556372605, now seen corresponding path program 79 times [2022-02-09 03:08:18,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:08:18,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786371638] [2022-02-09 03:08:18,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:08:18,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:08:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:08:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:18,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:08:18,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786371638] [2022-02-09 03:08:18,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786371638] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:08:18,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392563191] [2022-02-09 03:08:18,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:08:18,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:08:18,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:08:18,750 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) [2022-02-09 03:08:18,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-02-09 03:08:18,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:08:18,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:08:18,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:08:19,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:08:19,105 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 [2022-02-09 03:08:19,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:19,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:08:19,563 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:08:19,564 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 [2022-02-09 03:08:19,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:08:19,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:08:19,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:08:19,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:08:19,636 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 [2022-02-09 03:08:19,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:19,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392563191] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:08:19,688 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:08:19,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-09 03:08:19,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754699254] [2022-02-09 03:08:19,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:08:19,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:08:19,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:08:19,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:08:19,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:08:19,689 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) [2022-02-09 03:08:25,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:08:25,085 INFO L93 Difference]: Finished difference Result 17717 states and 77823 transitions. [2022-02-09 03:08:25,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-02-09 03:08:25,086 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 [2022-02-09 03:08:25,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:08:25,149 INFO L225 Difference]: With dead ends: 17717 [2022-02-09 03:08:25,149 INFO L226 Difference]: Without dead ends: 17624 [2022-02-09 03:08:25,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3103 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=976, Invalid=8726, Unknown=0, NotChecked=0, Total=9702 [2022-02-09 03:08:25,150 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1025 mSDsluCounter, 4238 mSDsCounter, 0 mSdLazyCounter, 5401 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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, 2.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:08:25,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1025 Valid, 1638 Invalid, 5614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 5401 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-09 03:08:25,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17624 states. [2022-02-09 03:08:25,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17624 to 14382. [2022-02-09 03:08:25,521 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) [2022-02-09 03:08:25,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14382 states to 14382 states and 66320 transitions. [2022-02-09 03:08:25,579 INFO L78 Accepts]: Start accepts. Automaton has 14382 states and 66320 transitions. Word has length 33 [2022-02-09 03:08:25,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:08:25,579 INFO L470 AbstractCegarLoop]: Abstraction has 14382 states and 66320 transitions. [2022-02-09 03:08:25,579 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) [2022-02-09 03:08:25,579 INFO L276 IsEmpty]: Start isEmpty. Operand 14382 states and 66320 transitions. [2022-02-09 03:08:25,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:08:25,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:08:25,682 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] [2022-02-09 03:08:25,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-02-09 03:08:25,898 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 [2022-02-09 03:08:25,898 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:08:25,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:08:25,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1649347995, now seen corresponding path program 80 times [2022-02-09 03:08:25,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:08:25,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801876643] [2022-02-09 03:08:25,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:08:25,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:08:25,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:08:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:26,164 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:08:26,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801876643] [2022-02-09 03:08:26,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801876643] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:08:26,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630361114] [2022-02-09 03:08:26,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:08:26,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:08:26,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:08:26,165 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) [2022-02-09 03:08:26,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-02-09 03:08:26,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:08:26,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:08:26,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:08:26,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:08:26,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:08:26,570 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 [2022-02-09 03:08:27,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:27,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:08:27,376 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:08:27,376 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 [2022-02-09 03:08:27,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:08:27,390 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 [2022-02-09 03:08:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:27,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630361114] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:08:27,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:08:27,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-09 03:08:27,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829126414] [2022-02-09 03:08:27,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:08:27,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-09 03:08:27,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:08:27,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-09 03:08:27,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2022-02-09 03:08:27,436 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) [2022-02-09 03:08:30,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:08:30,780 INFO L93 Difference]: Finished difference Result 17214 states and 75992 transitions. [2022-02-09 03:08:30,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-09 03:08:30,780 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 [2022-02-09 03:08:30,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:08:30,921 INFO L225 Difference]: With dead ends: 17214 [2022-02-09 03:08:30,922 INFO L226 Difference]: Without dead ends: 17120 [2022-02-09 03:08:30,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=654, Invalid=4896, Unknown=0, NotChecked=0, Total=5550 [2022-02-09 03:08:30,922 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 [2022-02-09 03:08:30,922 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] [2022-02-09 03:08:30,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17120 states. [2022-02-09 03:08:31,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17120 to 14420. [2022-02-09 03:08:31,254 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) [2022-02-09 03:08:31,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14420 states to 14420 states and 66513 transitions. [2022-02-09 03:08:31,321 INFO L78 Accepts]: Start accepts. Automaton has 14420 states and 66513 transitions. Word has length 33 [2022-02-09 03:08:31,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:08:31,321 INFO L470 AbstractCegarLoop]: Abstraction has 14420 states and 66513 transitions. [2022-02-09 03:08:31,321 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) [2022-02-09 03:08:31,321 INFO L276 IsEmpty]: Start isEmpty. Operand 14420 states and 66513 transitions. [2022-02-09 03:08:31,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:08:31,363 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:08:31,363 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] [2022-02-09 03:08:31,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-02-09 03:08:31,579 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 [2022-02-09 03:08:31,579 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:08:31,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:08:31,580 INFO L85 PathProgramCache]: Analyzing trace with hash 950808259, now seen corresponding path program 81 times [2022-02-09 03:08:31,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:08:31,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224099309] [2022-02-09 03:08:31,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:08:31,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:08:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:08:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:31,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:08:31,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224099309] [2022-02-09 03:08:31,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224099309] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:08:31,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424261057] [2022-02-09 03:08:31,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:08:31,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:08:31,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:08:31,768 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) [2022-02-09 03:08:31,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-02-09 03:08:31,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-09 03:08:31,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:08:31,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-09 03:08:31,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:08:32,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:08:32,144 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 [2022-02-09 03:08:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:32,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:08:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:32,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424261057] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:08:32,632 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:08:32,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-02-09 03:08:32,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005196015] [2022-02-09 03:08:32,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:08:32,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-09 03:08:32,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:08:32,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-09 03:08:32,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2022-02-09 03:08:32,633 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) [2022-02-09 03:08:37,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:08:37,861 INFO L93 Difference]: Finished difference Result 20636 states and 90422 transitions. [2022-02-09 03:08:37,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-09 03:08:37,861 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 [2022-02-09 03:08:37,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:08:37,950 INFO L225 Difference]: With dead ends: 20636 [2022-02-09 03:08:37,950 INFO L226 Difference]: Without dead ends: 20566 [2022-02-09 03:08:37,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3343 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1426, Invalid=8876, Unknown=0, NotChecked=0, Total=10302 [2022-02-09 03:08:37,952 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 1319 mSDsluCounter, 4232 mSDsCounter, 0 mSdLazyCounter, 5252 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 2.0s IncrementalHoareTripleChecker+Time [2022-02-09 03:08:37,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1319 Valid, 1638 Invalid, 5596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 5252 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-09 03:08:37,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20566 states. [2022-02-09 03:08:38,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20566 to 15044. [2022-02-09 03:08:38,554 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) [2022-02-09 03:08:38,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15044 states to 15044 states and 70031 transitions. [2022-02-09 03:08:38,610 INFO L78 Accepts]: Start accepts. Automaton has 15044 states and 70031 transitions. Word has length 33 [2022-02-09 03:08:38,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:08:38,610 INFO L470 AbstractCegarLoop]: Abstraction has 15044 states and 70031 transitions. [2022-02-09 03:08:38,610 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) [2022-02-09 03:08:38,610 INFO L276 IsEmpty]: Start isEmpty. Operand 15044 states and 70031 transitions. [2022-02-09 03:08:38,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:08:38,644 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:08:38,644 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] [2022-02-09 03:08:38,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-02-09 03:08:38,859 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 [2022-02-09 03:08:38,859 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:08:38,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:08:38,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1259566239, now seen corresponding path program 82 times [2022-02-09 03:08:38,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:08:38,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111020159] [2022-02-09 03:08:38,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:08:38,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:08:38,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:08:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:39,085 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:08:39,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111020159] [2022-02-09 03:08:39,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111020159] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:08:39,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597139059] [2022-02-09 03:08:39,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:08:39,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:08:39,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:08:39,086 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) [2022-02-09 03:08:39,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-02-09 03:08:39,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:08:39,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:08:39,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:08:39,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:08:39,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:08:39,428 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 [2022-02-09 03:08:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:39,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:08:39,879 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:08:39,880 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 [2022-02-09 03:08:39,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:08:39,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:08:39,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:08:39,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:08:39,918 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 [2022-02-09 03:08:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:39,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597139059] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:08:39,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:08:39,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-09 03:08:39,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451439191] [2022-02-09 03:08:39,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:08:39,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:08:39,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:08:39,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:08:39,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:08:39,950 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) [2022-02-09 03:08:44,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:08:44,675 INFO L93 Difference]: Finished difference Result 17637 states and 79021 transitions. [2022-02-09 03:08:44,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-09 03:08:44,675 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 [2022-02-09 03:08:44,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:08:44,733 INFO L225 Difference]: With dead ends: 17637 [2022-02-09 03:08:44,734 INFO L226 Difference]: Without dead ends: 17500 [2022-02-09 03:08:44,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2771 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=865, Invalid=8065, Unknown=0, NotChecked=0, Total=8930 [2022-02-09 03:08:44,735 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1038 mSDsluCounter, 4251 mSDsCounter, 0 mSdLazyCounter, 5254 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 2.0s IncrementalHoareTripleChecker+Time [2022-02-09 03:08:44,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1038 Valid, 1634 Invalid, 5655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 5254 Invalid, 0 Unknown, 165 Unchecked, 2.0s Time] [2022-02-09 03:08:44,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17500 states. [2022-02-09 03:08:45,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17500 to 15001. [2022-02-09 03:08:45,242 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) [2022-02-09 03:08:45,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15001 states to 15001 states and 69871 transitions. [2022-02-09 03:08:45,412 INFO L78 Accepts]: Start accepts. Automaton has 15001 states and 69871 transitions. Word has length 33 [2022-02-09 03:08:45,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:08:45,412 INFO L470 AbstractCegarLoop]: Abstraction has 15001 states and 69871 transitions. [2022-02-09 03:08:45,413 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) [2022-02-09 03:08:45,413 INFO L276 IsEmpty]: Start isEmpty. Operand 15001 states and 69871 transitions. [2022-02-09 03:08:45,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:08:45,457 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:08:45,457 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] [2022-02-09 03:08:45,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-02-09 03:08:45,681 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 [2022-02-09 03:08:45,681 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:08:45,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:08:45,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1205308463, now seen corresponding path program 83 times [2022-02-09 03:08:45,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:08:45,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496171001] [2022-02-09 03:08:45,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:08:45,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:08:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:08:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:45,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:08:45,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496171001] [2022-02-09 03:08:45,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496171001] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:08:45,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072334773] [2022-02-09 03:08:45,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:08:45,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:08:45,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:08:45,854 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) [2022-02-09 03:08:45,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-02-09 03:08:45,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-09 03:08:45,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:08:45,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:08:45,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:08:46,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:08:46,145 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 [2022-02-09 03:08:46,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:46,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:08:46,502 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:08:46,503 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 [2022-02-09 03:08:46,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:08:46,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:08:46,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:08:46,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:08:46,567 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 [2022-02-09 03:08:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:46,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072334773] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:08:46,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:08:46,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-02-09 03:08:46,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973206622] [2022-02-09 03:08:46,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:08:46,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-09 03:08:46,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:08:46,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-09 03:08:46,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2022-02-09 03:08:46,616 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) [2022-02-09 03:08:48,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:08:48,868 INFO L93 Difference]: Finished difference Result 16718 states and 76386 transitions. [2022-02-09 03:08:48,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-09 03:08:48,868 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 [2022-02-09 03:08:48,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:08:48,922 INFO L225 Difference]: With dead ends: 16718 [2022-02-09 03:08:48,923 INFO L226 Difference]: Without dead ends: 16614 [2022-02-09 03:08:48,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=678, Invalid=5022, Unknown=0, NotChecked=0, Total=5700 [2022-02-09 03:08:48,924 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 746 mSDsluCounter, 2443 mSDsCounter, 0 mSdLazyCounter, 3184 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.1s IncrementalHoareTripleChecker+Time [2022-02-09 03:08:48,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 998 Invalid, 3330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 3184 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-09 03:08:48,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16614 states. [2022-02-09 03:08:49,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16614 to 15258. [2022-02-09 03:08:49,456 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) [2022-02-09 03:08:49,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15258 states to 15258 states and 71083 transitions. [2022-02-09 03:08:49,529 INFO L78 Accepts]: Start accepts. Automaton has 15258 states and 71083 transitions. Word has length 33 [2022-02-09 03:08:49,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:08:49,530 INFO L470 AbstractCegarLoop]: Abstraction has 15258 states and 71083 transitions. [2022-02-09 03:08:49,530 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) [2022-02-09 03:08:49,530 INFO L276 IsEmpty]: Start isEmpty. Operand 15258 states and 71083 transitions. [2022-02-09 03:08:49,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:08:49,575 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:08:49,575 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] [2022-02-09 03:08:49,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2022-02-09 03:08:49,791 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 [2022-02-09 03:08:49,791 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:08:49,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:08:49,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1151921943, now seen corresponding path program 84 times [2022-02-09 03:08:49,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:08:49,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487696386] [2022-02-09 03:08:49,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:08:49,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:08:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:08:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:50,154 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:08:50,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487696386] [2022-02-09 03:08:50,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487696386] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:08:50,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465579010] [2022-02-09 03:08:50,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:08:50,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:08:50,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:08:50,156 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) [2022-02-09 03:08:50,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-02-09 03:08:50,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-09 03:08:50,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:08:50,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-09 03:08:50,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:08:50,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:08:50,557 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-09 03:08:50,557 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 [2022-02-09 03:08:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:50,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:08:51,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:51,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465579010] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:08:51,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:08:51,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 32 [2022-02-09 03:08:51,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092393604] [2022-02-09 03:08:51,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:08:51,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:08:51,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:08:51,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:08:51,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:08:51,219 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) [2022-02-09 03:08:54,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:08:54,416 INFO L93 Difference]: Finished difference Result 18861 states and 84076 transitions. [2022-02-09 03:08:54,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-09 03:08:54,417 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 [2022-02-09 03:08:54,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:08:54,477 INFO L225 Difference]: With dead ends: 18861 [2022-02-09 03:08:54,477 INFO L226 Difference]: Without dead ends: 18759 [2022-02-09 03:08:54,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1580 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=676, Invalid=4874, Unknown=0, NotChecked=0, Total=5550 [2022-02-09 03:08:54,478 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 [2022-02-09 03:08:54,479 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] [2022-02-09 03:08:54,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18759 states. [2022-02-09 03:08:54,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18759 to 15447. [2022-02-09 03:08:54,902 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) [2022-02-09 03:08:54,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15447 states to 15447 states and 71967 transitions. [2022-02-09 03:08:54,976 INFO L78 Accepts]: Start accepts. Automaton has 15447 states and 71967 transitions. Word has length 33 [2022-02-09 03:08:54,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:08:54,976 INFO L470 AbstractCegarLoop]: Abstraction has 15447 states and 71967 transitions. [2022-02-09 03:08:54,976 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) [2022-02-09 03:08:54,976 INFO L276 IsEmpty]: Start isEmpty. Operand 15447 states and 71967 transitions. [2022-02-09 03:08:55,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:08:55,017 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:08:55,017 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] [2022-02-09 03:08:55,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-02-09 03:08:55,220 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 [2022-02-09 03:08:55,220 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:08:55,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:08:55,221 INFO L85 PathProgramCache]: Analyzing trace with hash -142329247, now seen corresponding path program 85 times [2022-02-09 03:08:55,221 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:08:55,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858949585] [2022-02-09 03:08:55,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:08:55,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:08:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:08:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:55,392 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:08:55,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858949585] [2022-02-09 03:08:55,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858949585] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:08:55,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789667654] [2022-02-09 03:08:55,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:08:55,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:08:55,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:08:55,394 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) [2022-02-09 03:08:55,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-02-09 03:08:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:08:55,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:08:55,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:08:55,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:08:55,661 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 [2022-02-09 03:08:55,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:55,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:08:55,981 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:08:55,981 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 [2022-02-09 03:08:56,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:08:56,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:08:56,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:08:56,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:08:56,032 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 [2022-02-09 03:08:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:08:56,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789667654] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:08:56,070 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:08:56,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-09 03:08:56,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022090131] [2022-02-09 03:08:56,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:08:56,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:08:56,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:08:56,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:08:56,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:08:56,072 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) [2022-02-09 03:08:58,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:08:58,794 INFO L93 Difference]: Finished difference Result 16976 states and 77789 transitions. [2022-02-09 03:08:58,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-09 03:08:58,794 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 [2022-02-09 03:08:58,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:08:58,874 INFO L225 Difference]: With dead ends: 16976 [2022-02-09 03:08:58,874 INFO L226 Difference]: Without dead ends: 16789 [2022-02-09 03:08:58,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2134 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=754, Invalid=6052, Unknown=0, NotChecked=0, Total=6806 [2022-02-09 03:08:58,875 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 778 mSDsluCounter, 2541 mSDsCounter, 0 mSdLazyCounter, 3301 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.3s IncrementalHoareTripleChecker+Time [2022-02-09 03:08:58,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [778 Valid, 1038 Invalid, 3463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 3301 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-09 03:08:58,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16789 states. [2022-02-09 03:08:59,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16789 to 15392. [2022-02-09 03:08:59,326 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) [2022-02-09 03:08:59,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15392 states to 15392 states and 71720 transitions. [2022-02-09 03:08:59,569 INFO L78 Accepts]: Start accepts. Automaton has 15392 states and 71720 transitions. Word has length 33 [2022-02-09 03:08:59,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:08:59,569 INFO L470 AbstractCegarLoop]: Abstraction has 15392 states and 71720 transitions. [2022-02-09 03:08:59,569 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) [2022-02-09 03:08:59,569 INFO L276 IsEmpty]: Start isEmpty. Operand 15392 states and 71720 transitions. [2022-02-09 03:08:59,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:08:59,612 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:08:59,612 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] [2022-02-09 03:08:59,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2022-02-09 03:08:59,833 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 [2022-02-09 03:08:59,833 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:08:59,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:08:59,834 INFO L85 PathProgramCache]: Analyzing trace with hash -654878009, now seen corresponding path program 86 times [2022-02-09 03:08:59,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:08:59,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916614616] [2022-02-09 03:08:59,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:08:59,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:08:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:09:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:00,006 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:09:00,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916614616] [2022-02-09 03:09:00,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916614616] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:09:00,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569730966] [2022-02-09 03:09:00,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:09:00,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:09:00,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:09:00,008 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) [2022-02-09 03:09:00,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-02-09 03:09:00,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:09:00,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:09:00,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:09:00,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:09:00,358 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:09:00,358 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 [2022-02-09 03:09:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:00,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:09:01,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:09:01,131 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 [2022-02-09 03:09:01,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:09:01,139 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 [2022-02-09 03:09:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:01,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569730966] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:09:01,177 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:09:01,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-02-09 03:09:01,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906106527] [2022-02-09 03:09:01,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:09:01,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-09 03:09:01,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:09:01,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-09 03:09:01,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-02-09 03:09:01,178 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) [2022-02-09 03:09:02,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:09:02,705 INFO L93 Difference]: Finished difference Result 16443 states and 75671 transitions. [2022-02-09 03:09:02,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-09 03:09:02,705 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 [2022-02-09 03:09:02,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:09:02,759 INFO L225 Difference]: With dead ends: 16443 [2022-02-09 03:09:02,759 INFO L226 Difference]: Without dead ends: 16426 [2022-02-09 03:09:02,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=318, Invalid=2232, Unknown=0, NotChecked=0, Total=2550 [2022-02-09 03:09:02,760 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 527 mSDsluCounter, 2256 mSDsCounter, 0 mSdLazyCounter, 2602 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-02-09 03:09:02,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 884 Invalid, 3211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2602 Invalid, 0 Unknown, 536 Unchecked, 0.8s Time] [2022-02-09 03:09:02,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16426 states. [2022-02-09 03:09:03,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16426 to 15399. [2022-02-09 03:09:03,065 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) [2022-02-09 03:09:03,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15399 states to 15399 states and 71756 transitions. [2022-02-09 03:09:03,123 INFO L78 Accepts]: Start accepts. Automaton has 15399 states and 71756 transitions. Word has length 33 [2022-02-09 03:09:03,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:09:03,123 INFO L470 AbstractCegarLoop]: Abstraction has 15399 states and 71756 transitions. [2022-02-09 03:09:03,123 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) [2022-02-09 03:09:03,123 INFO L276 IsEmpty]: Start isEmpty. Operand 15399 states and 71756 transitions. [2022-02-09 03:09:03,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:09:03,158 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:09:03,158 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] [2022-02-09 03:09:03,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2022-02-09 03:09:03,373 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 [2022-02-09 03:09:03,374 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:09:03,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:09:03,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1554240081, now seen corresponding path program 87 times [2022-02-09 03:09:03,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:09:03,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812801008] [2022-02-09 03:09:03,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:09:03,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:09:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:09:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:03,737 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:09:03,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812801008] [2022-02-09 03:09:03,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812801008] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:09:03,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105408585] [2022-02-09 03:09:03,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:09:03,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:09:03,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:09:03,738 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) [2022-02-09 03:09:03,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-02-09 03:09:03,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-09 03:09:03,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:09:03,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:09:03,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:09:04,043 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:09:04,043 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 [2022-02-09 03:09:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:06,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:09:07,042 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:09:07,042 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-02-09 03:09:07,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:09:07,052 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 [2022-02-09 03:09:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:07,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105408585] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:09:07,113 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:09:07,113 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-09 03:09:07,113 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498734030] [2022-02-09 03:09:07,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:09:07,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-09 03:09:07,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:09:07,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-09 03:09:07,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1063, Unknown=1, NotChecked=0, Total=1190 [2022-02-09 03:09:07,115 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) [2022-02-09 03:09:10,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:09:10,955 INFO L93 Difference]: Finished difference Result 18711 states and 83306 transitions. [2022-02-09 03:09:10,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-09 03:09:10,956 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 [2022-02-09 03:09:10,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:09:11,021 INFO L225 Difference]: With dead ends: 18711 [2022-02-09 03:09:11,021 INFO L226 Difference]: Without dead ends: 18689 [2022-02-09 03:09:11,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2042 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=595, Invalid=5884, Unknown=1, NotChecked=0, Total=6480 [2022-02-09 03:09:11,022 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 878 mSDsluCounter, 4037 mSDsCounter, 0 mSdLazyCounter, 4363 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.9s IncrementalHoareTripleChecker+Time [2022-02-09 03:09:11,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [878 Valid, 1700 Invalid, 5305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 4363 Invalid, 0 Unknown, 854 Unchecked, 1.9s Time] [2022-02-09 03:09:11,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18689 states. [2022-02-09 03:09:11,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18689 to 15678. [2022-02-09 03:09:11,427 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) [2022-02-09 03:09:11,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15678 states to 15678 states and 73034 transitions. [2022-02-09 03:09:11,595 INFO L78 Accepts]: Start accepts. Automaton has 15678 states and 73034 transitions. Word has length 33 [2022-02-09 03:09:11,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:09:11,595 INFO L470 AbstractCegarLoop]: Abstraction has 15678 states and 73034 transitions. [2022-02-09 03:09:11,595 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) [2022-02-09 03:09:11,596 INFO L276 IsEmpty]: Start isEmpty. Operand 15678 states and 73034 transitions. [2022-02-09 03:09:11,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:09:11,637 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:09:11,637 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] [2022-02-09 03:09:11,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-02-09 03:09:11,852 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 [2022-02-09 03:09:11,852 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:09:11,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:09:11,852 INFO L85 PathProgramCache]: Analyzing trace with hash 960128913, now seen corresponding path program 88 times [2022-02-09 03:09:11,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:09:11,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636954360] [2022-02-09 03:09:11,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:09:11,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:09:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:09:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:12,098 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:09:12,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636954360] [2022-02-09 03:09:12,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636954360] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:09:12,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625473926] [2022-02-09 03:09:12,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:09:12,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:09:12,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:09:12,100 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) [2022-02-09 03:09:12,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-02-09 03:09:12,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:09:12,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:09:12,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:09:12,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:09:12,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:09:12,493 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 [2022-02-09 03:09:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:12,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:09:12,892 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:09:12,892 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 [2022-02-09 03:09:12,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:09:12,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:09:12,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:09:12,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:09:12,963 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 [2022-02-09 03:09:13,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:13,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625473926] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:09:13,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:09:13,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-09 03:09:13,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865737385] [2022-02-09 03:09:13,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:09:13,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:09:13,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:09:13,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:09:13,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:09:13,015 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) [2022-02-09 03:09:17,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:09:17,800 INFO L93 Difference]: Finished difference Result 19928 states and 88107 transitions. [2022-02-09 03:09:17,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-09 03:09:17,801 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 [2022-02-09 03:09:17,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:09:17,868 INFO L225 Difference]: With dead ends: 19928 [2022-02-09 03:09:17,868 INFO L226 Difference]: Without dead ends: 19813 [2022-02-09 03:09:17,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3509 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1047, Invalid=9459, Unknown=0, NotChecked=0, Total=10506 [2022-02-09 03:09:17,869 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1207 mSDsluCounter, 3820 mSDsCounter, 0 mSdLazyCounter, 4897 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.2s IncrementalHoareTripleChecker+Time [2022-02-09 03:09:17,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1207 Valid, 1482 Invalid, 5095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 4897 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-09 03:09:17,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19813 states. [2022-02-09 03:09:18,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19813 to 16009. [2022-02-09 03:09:18,338 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) [2022-02-09 03:09:18,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16009 states to 16009 states and 74673 transitions. [2022-02-09 03:09:18,407 INFO L78 Accepts]: Start accepts. Automaton has 16009 states and 74673 transitions. Word has length 33 [2022-02-09 03:09:18,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:09:18,407 INFO L470 AbstractCegarLoop]: Abstraction has 16009 states and 74673 transitions. [2022-02-09 03:09:18,407 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) [2022-02-09 03:09:18,407 INFO L276 IsEmpty]: Start isEmpty. Operand 16009 states and 74673 transitions. [2022-02-09 03:09:18,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:09:18,442 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:09:18,442 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] [2022-02-09 03:09:18,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-02-09 03:09:18,657 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 [2022-02-09 03:09:18,658 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:09:18,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:09:18,658 INFO L85 PathProgramCache]: Analyzing trace with hash -2002515719, now seen corresponding path program 89 times [2022-02-09 03:09:18,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:09:18,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932460959] [2022-02-09 03:09:18,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:09:18,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:09:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:09:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:18,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:09:18,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932460959] [2022-02-09 03:09:18,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932460959] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:09:18,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032525487] [2022-02-09 03:09:18,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:09:18,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:09:18,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:09:18,885 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) [2022-02-09 03:09:18,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-02-09 03:09:18,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-09 03:09:18,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:09:18,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:09:18,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:09:19,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:09:19,321 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 [2022-02-09 03:09:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:19,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:09:19,727 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:09:19,728 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 [2022-02-09 03:09:19,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:09:19,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:09:19,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:09:19,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:09:19,796 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 [2022-02-09 03:09:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:19,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032525487] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:09:19,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:09:19,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-09 03:09:19,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72666885] [2022-02-09 03:09:19,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:09:19,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:09:19,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:09:19,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:09:19,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:09:19,849 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) [2022-02-09 03:09:22,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:09:22,903 INFO L93 Difference]: Finished difference Result 17781 states and 81478 transitions. [2022-02-09 03:09:22,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-09 03:09:22,903 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 [2022-02-09 03:09:22,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:09:22,972 INFO L225 Difference]: With dead ends: 17781 [2022-02-09 03:09:22,972 INFO L226 Difference]: Without dead ends: 17651 [2022-02-09 03:09:22,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=572, Invalid=5280, Unknown=0, NotChecked=0, Total=5852 [2022-02-09 03:09:22,973 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 700 mSDsluCounter, 2984 mSDsCounter, 0 mSdLazyCounter, 3379 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-02-09 03:09:22,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 1209 Invalid, 4016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 3379 Invalid, 0 Unknown, 492 Unchecked, 1.6s Time] [2022-02-09 03:09:22,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17651 states. [2022-02-09 03:09:23,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17651 to 15985. [2022-02-09 03:09:23,332 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) [2022-02-09 03:09:23,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15985 states to 15985 states and 74530 transitions. [2022-02-09 03:09:23,397 INFO L78 Accepts]: Start accepts. Automaton has 15985 states and 74530 transitions. Word has length 33 [2022-02-09 03:09:23,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:09:23,397 INFO L470 AbstractCegarLoop]: Abstraction has 15985 states and 74530 transitions. [2022-02-09 03:09:23,397 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) [2022-02-09 03:09:23,397 INFO L276 IsEmpty]: Start isEmpty. Operand 15985 states and 74530 transitions. [2022-02-09 03:09:23,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:09:23,434 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:09:23,434 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] [2022-02-09 03:09:23,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Forceful destruction successful, exit code 0 [2022-02-09 03:09:23,649 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 [2022-02-09 03:09:23,650 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:09:23,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:09:23,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1115012038, now seen corresponding path program 12 times [2022-02-09 03:09:23,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:09:23,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545096360] [2022-02-09 03:09:23,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:09:23,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:09:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:09:23,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:23,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:09:23,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545096360] [2022-02-09 03:09:23,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545096360] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:09:23,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82857063] [2022-02-09 03:09:23,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:09:23,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:09:23,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:09:23,844 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) [2022-02-09 03:09:23,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-02-09 03:09:23,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-09 03:09:23,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:09:23,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:09:23,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:09:24,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:09:24,213 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-09 03:09:24,213 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 [2022-02-09 03:09:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:24,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:09:24,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-09 03:09:24,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82857063] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:09:24,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:09:24,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 30 [2022-02-09 03:09:24,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503665292] [2022-02-09 03:09:24,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:09:24,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-09 03:09:24,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:09:24,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-09 03:09:24,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-02-09 03:09:24,735 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) [2022-02-09 03:09:27,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:09:27,994 INFO L93 Difference]: Finished difference Result 18228 states and 83086 transitions. [2022-02-09 03:09:27,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-09 03:09:27,995 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 [2022-02-09 03:09:27,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:09:28,068 INFO L225 Difference]: With dead ends: 18228 [2022-02-09 03:09:28,068 INFO L226 Difference]: Without dead ends: 18148 [2022-02-09 03:09:28,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=555, Invalid=4995, Unknown=0, NotChecked=0, Total=5550 [2022-02-09 03:09:28,069 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 918 mSDsluCounter, 2979 mSDsCounter, 0 mSdLazyCounter, 3923 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:09:28,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 1229 Invalid, 4100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 3923 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-09 03:09:28,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18148 states. [2022-02-09 03:09:28,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18148 to 16027. [2022-02-09 03:09:28,531 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) [2022-02-09 03:09:28,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16027 states to 16027 states and 74733 transitions. [2022-02-09 03:09:28,598 INFO L78 Accepts]: Start accepts. Automaton has 16027 states and 74733 transitions. Word has length 33 [2022-02-09 03:09:28,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:09:28,598 INFO L470 AbstractCegarLoop]: Abstraction has 16027 states and 74733 transitions. [2022-02-09 03:09:28,598 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) [2022-02-09 03:09:28,598 INFO L276 IsEmpty]: Start isEmpty. Operand 16027 states and 74733 transitions. [2022-02-09 03:09:28,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:09:28,638 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:09:28,638 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] [2022-02-09 03:09:28,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2022-02-09 03:09:28,851 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 [2022-02-09 03:09:28,851 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:09:28,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:09:28,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1352994994, now seen corresponding path program 13 times [2022-02-09 03:09:28,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:09:28,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123422573] [2022-02-09 03:09:28,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:09:28,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:09:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:09:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:29,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:09:29,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123422573] [2022-02-09 03:09:29,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123422573] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:09:29,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427362401] [2022-02-09 03:09:29,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:09:29,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:09:29,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:09:29,024 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) [2022-02-09 03:09:29,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-02-09 03:09:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:09:29,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:09:29,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:09:29,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:09:29,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-02-09 03:09:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:29,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:09:29,829 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:09:29,830 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 [2022-02-09 03:09:29,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:09:29,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:09:29,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:09:29,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:09:29,893 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 [2022-02-09 03:09:29,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:29,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427362401] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:09:29,941 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:09:29,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-09 03:09:29,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436121884] [2022-02-09 03:09:29,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:09:29,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:09:29,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:09:29,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:09:29,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:09:29,942 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) [2022-02-09 03:09:32,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:09:32,753 INFO L93 Difference]: Finished difference Result 17634 states and 81016 transitions. [2022-02-09 03:09:32,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-09 03:09:32,754 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 [2022-02-09 03:09:32,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:09:32,838 INFO L225 Difference]: With dead ends: 17634 [2022-02-09 03:09:32,838 INFO L226 Difference]: Without dead ends: 17555 [2022-02-09 03:09:32,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=544, Invalid=5156, Unknown=0, NotChecked=0, Total=5700 [2022-02-09 03:09:32,839 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 [2022-02-09 03:09:32,839 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] [2022-02-09 03:09:32,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17555 states. [2022-02-09 03:09:33,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17555 to 15990. [2022-02-09 03:09:33,377 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) [2022-02-09 03:09:33,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15990 states to 15990 states and 74627 transitions. [2022-02-09 03:09:33,438 INFO L78 Accepts]: Start accepts. Automaton has 15990 states and 74627 transitions. Word has length 33 [2022-02-09 03:09:33,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:09:33,438 INFO L470 AbstractCegarLoop]: Abstraction has 15990 states and 74627 transitions. [2022-02-09 03:09:33,438 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) [2022-02-09 03:09:33,438 INFO L276 IsEmpty]: Start isEmpty. Operand 15990 states and 74627 transitions. [2022-02-09 03:09:33,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:09:33,482 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:09:33,482 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] [2022-02-09 03:09:33,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2022-02-09 03:09:33,695 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 [2022-02-09 03:09:33,695 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:09:33,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:09:33,696 INFO L85 PathProgramCache]: Analyzing trace with hash 756920949, now seen corresponding path program 90 times [2022-02-09 03:09:33,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:09:33,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855387218] [2022-02-09 03:09:33,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:09:33,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:09:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:09:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:33,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:09:33,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855387218] [2022-02-09 03:09:33,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855387218] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:09:33,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037446598] [2022-02-09 03:09:33,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:09:33,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:09:33,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:09:33,910 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) [2022-02-09 03:09:33,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-02-09 03:09:33,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-09 03:09:33,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:09:33,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:09:33,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:09:34,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:09:34,174 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-09 03:09:34,174 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 [2022-02-09 03:09:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:34,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:09:34,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 03:09:34,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037446598] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:09:34,647 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:09:34,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 33 [2022-02-09 03:09:34,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763882994] [2022-02-09 03:09:34,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:09:34,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-09 03:09:34,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:09:34,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-09 03:09:34,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2022-02-09 03:09:34,648 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) [2022-02-09 03:09:39,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:09:39,698 INFO L93 Difference]: Finished difference Result 19522 states and 86559 transitions. [2022-02-09 03:09:39,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-09 03:09:39,699 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 [2022-02-09 03:09:39,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:09:39,866 INFO L225 Difference]: With dead ends: 19522 [2022-02-09 03:09:39,866 INFO L226 Difference]: Without dead ends: 19461 [2022-02-09 03:09:39,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2636 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=948, Invalid=7424, Unknown=0, NotChecked=0, Total=8372 [2022-02-09 03:09:39,866 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 1570 mSDsluCounter, 4214 mSDsCounter, 0 mSdLazyCounter, 5289 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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, 2.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:09:39,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1570 Valid, 1623 Invalid, 5500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 5289 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-09 03:09:39,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19461 states. [2022-02-09 03:09:40,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19461 to 16114. [2022-02-09 03:09:40,267 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) [2022-02-09 03:09:40,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16114 states to 16114 states and 75147 transitions. [2022-02-09 03:09:40,331 INFO L78 Accepts]: Start accepts. Automaton has 16114 states and 75147 transitions. Word has length 33 [2022-02-09 03:09:40,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:09:40,331 INFO L470 AbstractCegarLoop]: Abstraction has 16114 states and 75147 transitions. [2022-02-09 03:09:40,331 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) [2022-02-09 03:09:40,331 INFO L276 IsEmpty]: Start isEmpty. Operand 16114 states and 75147 transitions. [2022-02-09 03:09:40,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:09:40,368 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:09:40,368 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] [2022-02-09 03:09:40,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-02-09 03:09:40,584 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 [2022-02-09 03:09:40,584 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:09:40,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:09:40,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1602896501, now seen corresponding path program 91 times [2022-02-09 03:09:40,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:09:40,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894833239] [2022-02-09 03:09:40,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:09:40,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:09:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:09:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:40,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:09:40,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894833239] [2022-02-09 03:09:40,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894833239] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:09:40,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824906039] [2022-02-09 03:09:40,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:09:40,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:09:40,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:09:40,786 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) [2022-02-09 03:09:40,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-02-09 03:09:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:09:40,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:09:40,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:09:41,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:09:41,077 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 [2022-02-09 03:09:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:41,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:09:41,372 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:09:41,373 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 [2022-02-09 03:09:41,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:09:41,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:09:41,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:09:41,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:09:41,428 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 [2022-02-09 03:09:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:41,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824906039] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:09:41,460 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:09:41,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-09 03:09:41,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922001122] [2022-02-09 03:09:41,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:09:41,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:09:41,460 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:09:41,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:09:41,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:09:41,461 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) [2022-02-09 03:09:47,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:09:47,326 INFO L93 Difference]: Finished difference Result 20429 states and 90191 transitions. [2022-02-09 03:09:47,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-09 03:09:47,326 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 [2022-02-09 03:09:47,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:09:47,392 INFO L225 Difference]: With dead ends: 20429 [2022-02-09 03:09:47,392 INFO L226 Difference]: Without dead ends: 20249 [2022-02-09 03:09:47,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3783 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1160, Invalid=9970, Unknown=0, NotChecked=0, Total=11130 [2022-02-09 03:09:47,393 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 1240 mSDsluCounter, 4113 mSDsCounter, 0 mSdLazyCounter, 4950 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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, 2.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:09:47,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1240 Valid, 1523 Invalid, 5675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 4950 Invalid, 0 Unknown, 526 Unchecked, 2.4s Time] [2022-02-09 03:09:47,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20249 states. [2022-02-09 03:09:47,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20249 to 16303. [2022-02-09 03:09:47,808 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) [2022-02-09 03:09:47,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16303 states to 16303 states and 76139 transitions. [2022-02-09 03:09:47,880 INFO L78 Accepts]: Start accepts. Automaton has 16303 states and 76139 transitions. Word has length 33 [2022-02-09 03:09:47,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:09:47,880 INFO L470 AbstractCegarLoop]: Abstraction has 16303 states and 76139 transitions. [2022-02-09 03:09:47,880 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) [2022-02-09 03:09:47,880 INFO L276 IsEmpty]: Start isEmpty. Operand 16303 states and 76139 transitions. [2022-02-09 03:09:47,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:09:47,920 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:09:47,920 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] [2022-02-09 03:09:47,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-02-09 03:09:48,136 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 [2022-02-09 03:09:48,136 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:09:48,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:09:48,136 INFO L85 PathProgramCache]: Analyzing trace with hash -62579695, now seen corresponding path program 92 times [2022-02-09 03:09:48,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:09:48,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585004544] [2022-02-09 03:09:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:09:48,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:09:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:09:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:48,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:09:48,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585004544] [2022-02-09 03:09:48,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585004544] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:09:48,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074718274] [2022-02-09 03:09:48,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:09:48,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:09:48,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:09:48,327 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) [2022-02-09 03:09:48,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-02-09 03:09:48,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:09:48,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:09:48,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:09:48,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:09:48,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:09:48,779 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 [2022-02-09 03:09:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:49,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:09:49,310 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:09:49,311 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-02-09 03:09:49,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:09:49,318 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 [2022-02-09 03:09:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:49,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074718274] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:09:49,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:09:49,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-02-09 03:09:49,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108029460] [2022-02-09 03:09:49,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:09:49,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-09 03:09:49,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:09:49,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-09 03:09:49,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2022-02-09 03:09:49,354 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) [2022-02-09 03:09:51,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:09:51,250 INFO L93 Difference]: Finished difference Result 16950 states and 78639 transitions. [2022-02-09 03:09:51,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-09 03:09:51,250 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 [2022-02-09 03:09:51,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:09:51,330 INFO L225 Difference]: With dead ends: 16950 [2022-02-09 03:09:51,331 INFO L226 Difference]: Without dead ends: 16921 [2022-02-09 03:09:51,331 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 [2022-02-09 03:09:51,331 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, 1.2s IncrementalHoareTripleChecker+Time [2022-02-09 03:09:51,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 1009 Invalid, 3772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 3298 Invalid, 0 Unknown, 374 Unchecked, 1.2s Time] [2022-02-09 03:09:51,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16921 states. [2022-02-09 03:09:51,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16921 to 16303. [2022-02-09 03:09:51,753 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) [2022-02-09 03:09:51,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16303 states to 16303 states and 76124 transitions. [2022-02-09 03:09:51,836 INFO L78 Accepts]: Start accepts. Automaton has 16303 states and 76124 transitions. Word has length 33 [2022-02-09 03:09:51,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:09:51,836 INFO L470 AbstractCegarLoop]: Abstraction has 16303 states and 76124 transitions. [2022-02-09 03:09:51,836 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) [2022-02-09 03:09:51,836 INFO L276 IsEmpty]: Start isEmpty. Operand 16303 states and 76124 transitions. [2022-02-09 03:09:51,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:09:51,876 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:09:51,876 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] [2022-02-09 03:09:51,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-02-09 03:09:52,095 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 [2022-02-09 03:09:52,096 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:09:52,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:09:52,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1889539959, now seen corresponding path program 93 times [2022-02-09 03:09:52,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:09:52,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406681068] [2022-02-09 03:09:52,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:09:52,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:09:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:09:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:52,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:09:52,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406681068] [2022-02-09 03:09:52,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406681068] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:09:52,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987851222] [2022-02-09 03:09:52,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:09:52,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:09:52,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:09:52,271 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) [2022-02-09 03:09:52,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-02-09 03:09:52,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-09 03:09:52,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:09:52,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:09:52,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:09:52,608 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:09:52,608 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 [2022-02-09 03:09:53,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:53,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:09:53,216 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:09:53,216 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 [2022-02-09 03:09:53,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:09:53,224 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 17 treesize of output 7 [2022-02-09 03:09:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:53,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987851222] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:09:53,264 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:09:53,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-02-09 03:09:53,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73774677] [2022-02-09 03:09:53,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:09:53,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-09 03:09:53,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:09:53,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-09 03:09:53,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-02-09 03:09:53,264 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) [2022-02-09 03:09:54,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:09:54,911 INFO L93 Difference]: Finished difference Result 16888 states and 78327 transitions. [2022-02-09 03:09:54,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-09 03:09:54,912 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 [2022-02-09 03:09:54,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:09:54,971 INFO L225 Difference]: With dead ends: 16888 [2022-02-09 03:09:54,971 INFO L226 Difference]: Without dead ends: 16860 [2022-02-09 03:09:54,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=234, Invalid=1836, Unknown=0, NotChecked=0, Total=2070 [2022-02-09 03:09:54,972 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 406 mSDsluCounter, 1987 mSDsCounter, 0 mSdLazyCounter, 2602 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.1s IncrementalHoareTripleChecker+Time [2022-02-09 03:09:54,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 808 Invalid, 2883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2602 Invalid, 0 Unknown, 235 Unchecked, 1.1s Time] [2022-02-09 03:09:54,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16860 states. [2022-02-09 03:09:55,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16860 to 16288. [2022-02-09 03:09:55,358 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) [2022-02-09 03:09:55,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16288 states to 16288 states and 76061 transitions. [2022-02-09 03:09:55,423 INFO L78 Accepts]: Start accepts. Automaton has 16288 states and 76061 transitions. Word has length 33 [2022-02-09 03:09:55,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:09:55,423 INFO L470 AbstractCegarLoop]: Abstraction has 16288 states and 76061 transitions. [2022-02-09 03:09:55,423 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) [2022-02-09 03:09:55,423 INFO L276 IsEmpty]: Start isEmpty. Operand 16288 states and 76061 transitions. [2022-02-09 03:09:55,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:09:55,459 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:09:55,459 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] [2022-02-09 03:09:55,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-02-09 03:09:55,675 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 [2022-02-09 03:09:55,675 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:09:55,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:09:55,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1963210305, now seen corresponding path program 94 times [2022-02-09 03:09:55,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:09:55,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567786832] [2022-02-09 03:09:55,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:09:55,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:09:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:09:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:55,895 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:09:55,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567786832] [2022-02-09 03:09:55,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567786832] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:09:55,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528625179] [2022-02-09 03:09:55,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:09:55,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:09:55,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:09:55,896 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) [2022-02-09 03:09:55,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-02-09 03:09:55,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:09:55,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:09:55,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:09:55,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:09:56,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:09:56,360 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 [2022-02-09 03:09:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:56,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:09:56,826 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:09:56,826 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 [2022-02-09 03:09:56,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:09:56,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:09:56,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:09:56,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:09:56,896 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 [2022-02-09 03:09:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:09:56,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528625179] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:09:56,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:09:56,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:09:56,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021641732] [2022-02-09 03:09:56,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:09:56,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:09:56,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:09:56,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:09:56,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=970, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:09:56,955 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) [2022-02-09 03:09:59,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:09:59,946 INFO L93 Difference]: Finished difference Result 17247 states and 79590 transitions. [2022-02-09 03:09:59,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-09 03:09:59,946 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 [2022-02-09 03:09:59,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:10:00,100 INFO L225 Difference]: With dead ends: 17247 [2022-02-09 03:10:00,101 INFO L226 Difference]: Without dead ends: 17104 [2022-02-09 03:10:00,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=375, Invalid=4455, Unknown=0, NotChecked=0, Total=4830 [2022-02-09 03:10:00,101 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 457 mSDsluCounter, 3243 mSDsCounter, 0 mSdLazyCounter, 4258 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-02-09 03:10:00,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 1341 Invalid, 4325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 4258 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-09 03:10:00,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17104 states. [2022-02-09 03:10:00,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17104 to 16294. [2022-02-09 03:10:00,439 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) [2022-02-09 03:10:00,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16294 states to 16294 states and 76078 transitions. [2022-02-09 03:10:00,509 INFO L78 Accepts]: Start accepts. Automaton has 16294 states and 76078 transitions. Word has length 33 [2022-02-09 03:10:00,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:10:00,509 INFO L470 AbstractCegarLoop]: Abstraction has 16294 states and 76078 transitions. [2022-02-09 03:10:00,509 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) [2022-02-09 03:10:00,509 INFO L276 IsEmpty]: Start isEmpty. Operand 16294 states and 76078 transitions. [2022-02-09 03:10:00,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:10:00,552 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:10:00,552 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] [2022-02-09 03:10:00,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-02-09 03:10:00,768 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 [2022-02-09 03:10:00,768 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:10:00,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:10:00,768 INFO L85 PathProgramCache]: Analyzing trace with hash -186109133, now seen corresponding path program 95 times [2022-02-09 03:10:00,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:10:00,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276090623] [2022-02-09 03:10:00,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:10:00,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:10:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:10:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:00,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:10:00,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276090623] [2022-02-09 03:10:00,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276090623] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:10:00,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665042060] [2022-02-09 03:10:00,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:10:00,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:10:00,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:10:00,961 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) [2022-02-09 03:10:00,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-02-09 03:10:01,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-09 03:10:01,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:10:01,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:10:01,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:10:01,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:10:01,355 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 [2022-02-09 03:10:01,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:01,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:10:01,778 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:10:01,779 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 [2022-02-09 03:10:01,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:10:01,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:10:01,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:10:01,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:10:01,848 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 [2022-02-09 03:10:01,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:01,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665042060] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:10:01,901 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:10:01,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-02-09 03:10:01,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128568742] [2022-02-09 03:10:01,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:10:01,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-09 03:10:01,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:10:01,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-09 03:10:01,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-02-09 03:10:01,902 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) [2022-02-09 03:10:04,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:10:04,254 INFO L93 Difference]: Finished difference Result 17444 states and 80518 transitions. [2022-02-09 03:10:04,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-09 03:10:04,254 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 [2022-02-09 03:10:04,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:10:04,318 INFO L225 Difference]: With dead ends: 17444 [2022-02-09 03:10:04,318 INFO L226 Difference]: Without dead ends: 17339 [2022-02-09 03:10:04,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=316, Invalid=3224, Unknown=0, NotChecked=0, Total=3540 [2022-02-09 03:10:04,319 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 550 mSDsluCounter, 2796 mSDsCounter, 0 mSdLazyCounter, 3603 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:10:04,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 1114 Invalid, 3674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 3603 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-09 03:10:04,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17339 states. [2022-02-09 03:10:04,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17339 to 16250. [2022-02-09 03:10:04,707 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) [2022-02-09 03:10:04,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16250 states to 16250 states and 75877 transitions. [2022-02-09 03:10:04,767 INFO L78 Accepts]: Start accepts. Automaton has 16250 states and 75877 transitions. Word has length 33 [2022-02-09 03:10:04,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:10:04,767 INFO L470 AbstractCegarLoop]: Abstraction has 16250 states and 75877 transitions. [2022-02-09 03:10:04,768 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) [2022-02-09 03:10:04,768 INFO L276 IsEmpty]: Start isEmpty. Operand 16250 states and 75877 transitions. [2022-02-09 03:10:04,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:10:04,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:10:04,804 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] [2022-02-09 03:10:04,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-02-09 03:10:05,019 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 [2022-02-09 03:10:05,019 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:10:05,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:10:05,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1517085983, now seen corresponding path program 96 times [2022-02-09 03:10:05,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:10:05,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828089378] [2022-02-09 03:10:05,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:10:05,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:10:05,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:10:05,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:05,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:10:05,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828089378] [2022-02-09 03:10:05,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828089378] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:10:05,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761177775] [2022-02-09 03:10:05,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:10:05,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:10:05,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:10:05,211 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) [2022-02-09 03:10:05,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-02-09 03:10:05,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-09 03:10:05,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:10:05,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:10:05,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:10:05,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:10:05,607 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-09 03:10:05,607 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 [2022-02-09 03:10:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:05,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:10:06,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:06,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761177775] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:10:06,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:10:06,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-02-09 03:10:06,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129943752] [2022-02-09 03:10:06,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:10:06,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:10:06,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:10:06,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:10:06,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:10:06,213 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) [2022-02-09 03:10:11,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:10:11,238 INFO L93 Difference]: Finished difference Result 19660 states and 89347 transitions. [2022-02-09 03:10:11,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-09 03:10:11,238 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 [2022-02-09 03:10:11,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:10:11,303 INFO L225 Difference]: With dead ends: 19660 [2022-02-09 03:10:11,303 INFO L226 Difference]: Without dead ends: 19622 [2022-02-09 03:10:11,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2590 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=987, Invalid=7943, Unknown=0, NotChecked=0, Total=8930 [2022-02-09 03:10:11,304 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1188 mSDsluCounter, 4051 mSDsCounter, 0 mSdLazyCounter, 5578 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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, 2.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:10:11,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1188 Valid, 1637 Invalid, 5794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 5578 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-09 03:10:11,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19622 states. [2022-02-09 03:10:11,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19622 to 16466. [2022-02-09 03:10:11,788 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) [2022-02-09 03:10:11,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16466 states to 16466 states and 77021 transitions. [2022-02-09 03:10:11,854 INFO L78 Accepts]: Start accepts. Automaton has 16466 states and 77021 transitions. Word has length 33 [2022-02-09 03:10:11,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:10:11,854 INFO L470 AbstractCegarLoop]: Abstraction has 16466 states and 77021 transitions. [2022-02-09 03:10:11,854 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) [2022-02-09 03:10:11,854 INFO L276 IsEmpty]: Start isEmpty. Operand 16466 states and 77021 transitions. [2022-02-09 03:10:11,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:10:11,893 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:10:11,893 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] [2022-02-09 03:10:11,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-02-09 03:10:12,106 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 [2022-02-09 03:10:12,107 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:10:12,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:10:12,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1474608707, now seen corresponding path program 97 times [2022-02-09 03:10:12,107 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:10:12,107 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598962683] [2022-02-09 03:10:12,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:10:12,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:10:12,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:10:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:12,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:10:12,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598962683] [2022-02-09 03:10:12,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598962683] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:10:12,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259416056] [2022-02-09 03:10:12,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:10:12,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:10:12,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:10:12,302 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) [2022-02-09 03:10:12,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-02-09 03:10:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:10:12,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:10:12,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:10:12,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:10:12,697 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 [2022-02-09 03:10:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:12,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:10:13,081 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:10:13,082 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 [2022-02-09 03:10:13,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:10:13,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:10:13,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:10:13,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:10:13,139 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 [2022-02-09 03:10:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:13,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259416056] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:10:13,189 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:10:13,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-02-09 03:10:13,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121737017] [2022-02-09 03:10:13,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:10:13,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-09 03:10:13,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:10:13,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-09 03:10:13,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2022-02-09 03:10:13,190 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) [2022-02-09 03:10:15,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:10:15,665 INFO L93 Difference]: Finished difference Result 18802 states and 86234 transitions. [2022-02-09 03:10:15,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-09 03:10:15,665 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 [2022-02-09 03:10:15,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:10:15,727 INFO L225 Difference]: With dead ends: 18802 [2022-02-09 03:10:15,727 INFO L226 Difference]: Without dead ends: 18773 [2022-02-09 03:10:15,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=360, Invalid=2946, Unknown=0, NotChecked=0, Total=3306 [2022-02-09 03:10:15,728 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 685 mSDsluCounter, 2960 mSDsCounter, 0 mSdLazyCounter, 3471 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-02-09 03:10:15,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 1274 Invalid, 3936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 3471 Invalid, 0 Unknown, 351 Unchecked, 1.6s Time] [2022-02-09 03:10:15,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18773 states. [2022-02-09 03:10:16,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18773 to 16847. [2022-02-09 03:10:16,134 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) [2022-02-09 03:10:16,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16847 states to 16847 states and 78814 transitions. [2022-02-09 03:10:16,199 INFO L78 Accepts]: Start accepts. Automaton has 16847 states and 78814 transitions. Word has length 33 [2022-02-09 03:10:16,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:10:16,200 INFO L470 AbstractCegarLoop]: Abstraction has 16847 states and 78814 transitions. [2022-02-09 03:10:16,200 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) [2022-02-09 03:10:16,200 INFO L276 IsEmpty]: Start isEmpty. Operand 16847 states and 78814 transitions. [2022-02-09 03:10:16,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:10:16,238 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:10:16,238 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] [2022-02-09 03:10:16,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-02-09 03:10:16,454 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 [2022-02-09 03:10:16,454 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:10:16,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:10:16,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1527995227, now seen corresponding path program 98 times [2022-02-09 03:10:16,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:10:16,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773425206] [2022-02-09 03:10:16,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:10:16,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:10:16,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:10:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:16,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:10:16,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773425206] [2022-02-09 03:10:16,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773425206] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:10:16,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534965748] [2022-02-09 03:10:16,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:10:16,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:10:16,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:10:16,799 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) [2022-02-09 03:10:16,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-02-09 03:10:16,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:10:16,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:10:16,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:10:16,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:10:17,184 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:10:17,184 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 [2022-02-09 03:10:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:17,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:10:17,815 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:10:17,815 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 [2022-02-09 03:10:17,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:10:17,825 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 [2022-02-09 03:10:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:17,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534965748] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:10:17,876 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:10:17,876 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-02-09 03:10:17,876 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482674655] [2022-02-09 03:10:17,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:10:17,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-09 03:10:17,876 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:10:17,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-09 03:10:17,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-02-09 03:10:17,876 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) [2022-02-09 03:10:19,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:10:19,299 INFO L93 Difference]: Finished difference Result 17471 states and 81218 transitions. [2022-02-09 03:10:19,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-09 03:10:19,299 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 [2022-02-09 03:10:19,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:10:19,357 INFO L225 Difference]: With dead ends: 17471 [2022-02-09 03:10:19,357 INFO L226 Difference]: Without dead ends: 17458 [2022-02-09 03:10:19,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=280, Invalid=1790, Unknown=0, NotChecked=0, Total=2070 [2022-02-09 03:10:19,357 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 [2022-02-09 03:10:19,357 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] [2022-02-09 03:10:19,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17458 states. [2022-02-09 03:10:19,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17458 to 16865. [2022-02-09 03:10:19,760 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) [2022-02-09 03:10:19,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16865 states to 16865 states and 78869 transitions. [2022-02-09 03:10:19,830 INFO L78 Accepts]: Start accepts. Automaton has 16865 states and 78869 transitions. Word has length 33 [2022-02-09 03:10:19,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:10:19,830 INFO L470 AbstractCegarLoop]: Abstraction has 16865 states and 78869 transitions. [2022-02-09 03:10:19,830 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) [2022-02-09 03:10:19,830 INFO L276 IsEmpty]: Start isEmpty. Operand 16865 states and 78869 transitions. [2022-02-09 03:10:19,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:10:19,870 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:10:19,870 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] [2022-02-09 03:10:19,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2022-02-09 03:10:20,086 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 [2022-02-09 03:10:20,086 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:10:20,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:10:20,087 INFO L85 PathProgramCache]: Analyzing trace with hash 970020710, now seen corresponding path program 14 times [2022-02-09 03:10:20,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:10:20,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111619151] [2022-02-09 03:10:20,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:10:20,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:10:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:10:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:20,272 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:10:20,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111619151] [2022-02-09 03:10:20,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111619151] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:10:20,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733564029] [2022-02-09 03:10:20,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:10:20,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:10:20,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:10:20,273 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) [2022-02-09 03:10:20,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-02-09 03:10:20,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:10:20,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:10:20,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:10:20,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:10:20,674 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:10:20,674 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 [2022-02-09 03:10:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:21,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:10:21,215 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:10:21,215 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 [2022-02-09 03:10:21,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:10:21,222 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 [2022-02-09 03:10:21,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:21,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733564029] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:10:21,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:10:21,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2022-02-09 03:10:21,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190371175] [2022-02-09 03:10:21,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:10:21,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-09 03:10:21,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:10:21,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-09 03:10:21,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-02-09 03:10:21,253 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) [2022-02-09 03:10:22,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:10:22,864 INFO L93 Difference]: Finished difference Result 17530 states and 81382 transitions. [2022-02-09 03:10:22,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-09 03:10:22,864 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 [2022-02-09 03:10:22,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:10:22,954 INFO L225 Difference]: With dead ends: 17530 [2022-02-09 03:10:22,954 INFO L226 Difference]: Without dead ends: 17523 [2022-02-09 03:10:22,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=280, Invalid=1976, Unknown=0, NotChecked=0, Total=2256 [2022-02-09 03:10:22,955 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 480 mSDsluCounter, 2309 mSDsCounter, 0 mSdLazyCounter, 2495 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.0s IncrementalHoareTripleChecker+Time [2022-02-09 03:10:22,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [480 Valid, 938 Invalid, 3270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2495 Invalid, 0 Unknown, 727 Unchecked, 1.0s Time] [2022-02-09 03:10:22,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17523 states. [2022-02-09 03:10:23,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17523 to 16876. [2022-02-09 03:10:23,369 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) [2022-02-09 03:10:23,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16876 states to 16876 states and 78896 transitions. [2022-02-09 03:10:23,446 INFO L78 Accepts]: Start accepts. Automaton has 16876 states and 78896 transitions. Word has length 33 [2022-02-09 03:10:23,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:10:23,446 INFO L470 AbstractCegarLoop]: Abstraction has 16876 states and 78896 transitions. [2022-02-09 03:10:23,446 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) [2022-02-09 03:10:23,446 INFO L276 IsEmpty]: Start isEmpty. Operand 16876 states and 78896 transitions. [2022-02-09 03:10:23,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:10:23,576 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:10:23,576 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] [2022-02-09 03:10:23,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-02-09 03:10:23,785 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 [2022-02-09 03:10:23,785 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:10:23,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:10:23,786 INFO L85 PathProgramCache]: Analyzing trace with hash -192426458, now seen corresponding path program 15 times [2022-02-09 03:10:23,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:10:23,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580785577] [2022-02-09 03:10:23,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:10:23,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:10:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:10:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:23,946 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:10:23,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580785577] [2022-02-09 03:10:23,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580785577] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:10:23,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435583652] [2022-02-09 03:10:23,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:10:23,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:10:23,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:10:23,948 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) [2022-02-09 03:10:23,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-02-09 03:10:23,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-09 03:10:23,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:10:23,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-09 03:10:23,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:10:24,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:10:24,230 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-02-09 03:10:24,230 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 [2022-02-09 03:10:24,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:24,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:10:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:24,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435583652] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:10:24,625 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:10:24,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 31 [2022-02-09 03:10:24,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633627515] [2022-02-09 03:10:24,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:10:24,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:10:24,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:10:24,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:10:24,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:10:24,626 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) [2022-02-09 03:10:28,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:10:28,645 INFO L93 Difference]: Finished difference Result 19651 states and 89482 transitions. [2022-02-09 03:10:28,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-09 03:10:28,645 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 [2022-02-09 03:10:28,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:10:28,733 INFO L225 Difference]: With dead ends: 19651 [2022-02-09 03:10:28,733 INFO L226 Difference]: Without dead ends: 19625 [2022-02-09 03:10:28,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2038 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=837, Invalid=6303, Unknown=0, NotChecked=0, Total=7140 [2022-02-09 03:10:28,734 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 1004 mSDsluCounter, 3918 mSDsCounter, 0 mSdLazyCounter, 5306 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.2s IncrementalHoareTripleChecker+Time [2022-02-09 03:10:28,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1004 Valid, 1607 Invalid, 5511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 5306 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-09 03:10:28,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19625 states. [2022-02-09 03:10:29,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19625 to 16876. [2022-02-09 03:10:29,276 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) [2022-02-09 03:10:29,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16876 states to 16876 states and 78936 transitions. [2022-02-09 03:10:29,357 INFO L78 Accepts]: Start accepts. Automaton has 16876 states and 78936 transitions. Word has length 33 [2022-02-09 03:10:29,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:10:29,357 INFO L470 AbstractCegarLoop]: Abstraction has 16876 states and 78936 transitions. [2022-02-09 03:10:29,357 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) [2022-02-09 03:10:29,357 INFO L276 IsEmpty]: Start isEmpty. Operand 16876 states and 78936 transitions. [2022-02-09 03:10:29,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:10:29,396 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:10:29,396 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] [2022-02-09 03:10:29,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2022-02-09 03:10:29,602 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 [2022-02-09 03:10:29,603 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:10:29,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:10:29,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1903053167, now seen corresponding path program 99 times [2022-02-09 03:10:29,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:10:29,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964602533] [2022-02-09 03:10:29,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:10:29,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:10:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:10:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:29,795 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:10:29,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964602533] [2022-02-09 03:10:29,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964602533] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:10:29,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000290101] [2022-02-09 03:10:29,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:10:29,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:10:29,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:10:29,796 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) [2022-02-09 03:10:29,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-02-09 03:10:29,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-09 03:10:29,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:10:29,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-09 03:10:29,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:10:30,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:10:30,216 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-02-09 03:10:30,217 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 [2022-02-09 03:10:30,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:30,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:10:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:30,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000290101] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:10:30,821 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:10:30,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-02-09 03:10:30,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331197942] [2022-02-09 03:10:30,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:10:30,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:10:30,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:10:30,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:10:30,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:10:30,821 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) [2022-02-09 03:10:35,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:10:35,329 INFO L93 Difference]: Finished difference Result 19762 states and 90087 transitions. [2022-02-09 03:10:35,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-09 03:10:35,329 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 [2022-02-09 03:10:35,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:10:35,393 INFO L225 Difference]: With dead ends: 19762 [2022-02-09 03:10:35,393 INFO L226 Difference]: Without dead ends: 19713 [2022-02-09 03:10:35,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2435 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=833, Invalid=7539, Unknown=0, NotChecked=0, Total=8372 [2022-02-09 03:10:35,395 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 1127 mSDsluCounter, 4343 mSDsCounter, 0 mSdLazyCounter, 5892 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:10:35,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1127 Valid, 1797 Invalid, 6112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 5892 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-09 03:10:35,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19713 states. [2022-02-09 03:10:35,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19713 to 16775. [2022-02-09 03:10:35,864 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) [2022-02-09 03:10:35,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16775 states to 16775 states and 78483 transitions. [2022-02-09 03:10:35,926 INFO L78 Accepts]: Start accepts. Automaton has 16775 states and 78483 transitions. Word has length 33 [2022-02-09 03:10:35,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:10:35,926 INFO L470 AbstractCegarLoop]: Abstraction has 16775 states and 78483 transitions. [2022-02-09 03:10:35,926 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) [2022-02-09 03:10:35,926 INFO L276 IsEmpty]: Start isEmpty. Operand 16775 states and 78483 transitions. [2022-02-09 03:10:35,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:10:35,964 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:10:35,964 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] [2022-02-09 03:10:35,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-02-09 03:10:36,180 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 [2022-02-09 03:10:36,180 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:10:36,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:10:36,180 INFO L85 PathProgramCache]: Analyzing trace with hash 534833869, now seen corresponding path program 100 times [2022-02-09 03:10:36,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:10:36,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422618285] [2022-02-09 03:10:36,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:10:36,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:10:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:10:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:36,357 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:10:36,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422618285] [2022-02-09 03:10:36,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422618285] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:10:36,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954949225] [2022-02-09 03:10:36,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:10:36,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:10:36,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:10:36,358 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) [2022-02-09 03:10:36,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-02-09 03:10:36,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:10:36,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:10:36,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:10:36,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:10:36,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:10:36,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-02-09 03:10:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:36,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:10:37,132 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:10:37,132 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 [2022-02-09 03:10:37,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:10:37,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:10:37,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:10:37,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:10:37,194 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 [2022-02-09 03:10:37,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:37,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954949225] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:10:37,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:10:37,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-09 03:10:37,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661076778] [2022-02-09 03:10:37,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:10:37,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:10:37,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:10:37,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:10:37,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:10:37,236 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) [2022-02-09 03:10:40,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:10:40,009 INFO L93 Difference]: Finished difference Result 18069 states and 83556 transitions. [2022-02-09 03:10:40,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-09 03:10:40,010 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 [2022-02-09 03:10:40,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:10:40,087 INFO L225 Difference]: With dead ends: 18069 [2022-02-09 03:10:40,087 INFO L226 Difference]: Without dead ends: 18033 [2022-02-09 03:10:40,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=457, Invalid=4235, Unknown=0, NotChecked=0, Total=4692 [2022-02-09 03:10:40,088 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 [2022-02-09 03:10:40,088 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] [2022-02-09 03:10:40,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18033 states. [2022-02-09 03:10:40,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18033 to 16775. [2022-02-09 03:10:40,469 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) [2022-02-09 03:10:40,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16775 states to 16775 states and 78483 transitions. [2022-02-09 03:10:40,535 INFO L78 Accepts]: Start accepts. Automaton has 16775 states and 78483 transitions. Word has length 33 [2022-02-09 03:10:40,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:10:40,535 INFO L470 AbstractCegarLoop]: Abstraction has 16775 states and 78483 transitions. [2022-02-09 03:10:40,535 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) [2022-02-09 03:10:40,535 INFO L276 IsEmpty]: Start isEmpty. Operand 16775 states and 78483 transitions. [2022-02-09 03:10:40,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:10:40,575 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:10:40,575 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] [2022-02-09 03:10:40,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-02-09 03:10:40,790 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 [2022-02-09 03:10:40,790 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:10:40,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:10:40,791 INFO L85 PathProgramCache]: Analyzing trace with hash 181694379, now seen corresponding path program 101 times [2022-02-09 03:10:40,791 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:10:40,791 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980048550] [2022-02-09 03:10:40,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:10:40,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:10:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:10:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:40,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:10:40,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980048550] [2022-02-09 03:10:40,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980048550] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:10:40,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75310571] [2022-02-09 03:10:40,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:10:40,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:10:40,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:10:40,986 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) [2022-02-09 03:10:40,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-02-09 03:10:41,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-09 03:10:41,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:10:41,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-09 03:10:41,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:10:41,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:10:41,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:10:41,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:10:41,300 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 [2022-02-09 03:10:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:41,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:10:41,689 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:10:41,689 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 [2022-02-09 03:10:41,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:10:41,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:10:41,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:10:41,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:10:41,734 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 [2022-02-09 03:10:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:41,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75310571] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:10:41,769 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:10:41,769 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 32 [2022-02-09 03:10:41,769 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568878877] [2022-02-09 03:10:41,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:10:41,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:10:41,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:10:41,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:10:41,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:10:41,770 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) [2022-02-09 03:10:44,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:10:44,850 INFO L93 Difference]: Finished difference Result 19190 states and 87841 transitions. [2022-02-09 03:10:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-09 03:10:44,850 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 [2022-02-09 03:10:44,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:10:44,910 INFO L225 Difference]: With dead ends: 19190 [2022-02-09 03:10:44,911 INFO L226 Difference]: Without dead ends: 19116 [2022-02-09 03:10:44,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1708 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=550, Invalid=5150, Unknown=0, NotChecked=0, Total=5700 [2022-02-09 03:10:44,927 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 [2022-02-09 03:10:44,927 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] [2022-02-09 03:10:44,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19116 states. [2022-02-09 03:10:45,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19116 to 16775. [2022-02-09 03:10:45,538 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) [2022-02-09 03:10:45,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16775 states to 16775 states and 78579 transitions. [2022-02-09 03:10:45,623 INFO L78 Accepts]: Start accepts. Automaton has 16775 states and 78579 transitions. Word has length 33 [2022-02-09 03:10:45,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:10:45,624 INFO L470 AbstractCegarLoop]: Abstraction has 16775 states and 78579 transitions. [2022-02-09 03:10:45,624 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) [2022-02-09 03:10:45,624 INFO L276 IsEmpty]: Start isEmpty. Operand 16775 states and 78579 transitions. [2022-02-09 03:10:45,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:10:45,672 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:10:45,672 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] [2022-02-09 03:10:45,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-02-09 03:10:45,895 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 [2022-02-09 03:10:45,895 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:10:45,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:10:45,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1675540629, now seen corresponding path program 102 times [2022-02-09 03:10:45,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:10:45,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304690878] [2022-02-09 03:10:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:10:45,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:10:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:10:46,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:46,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:10:46,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304690878] [2022-02-09 03:10:46,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304690878] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:10:46,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800838308] [2022-02-09 03:10:46,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:10:46,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:10:46,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:10:46,065 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) [2022-02-09 03:10:46,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-02-09 03:10:46,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-09 03:10:46,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:10:46,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:10:46,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:10:46,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:10:46,444 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-09 03:10:46,444 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 [2022-02-09 03:10:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:46,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:10:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:46,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800838308] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:10:46,975 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:10:46,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 31 [2022-02-09 03:10:46,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954532455] [2022-02-09 03:10:46,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:10:46,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:10:46,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:10:46,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:10:46,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:10:46,976 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) [2022-02-09 03:10:50,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:10:50,981 INFO L93 Difference]: Finished difference Result 19035 states and 87325 transitions. [2022-02-09 03:10:50,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-09 03:10:50,981 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 [2022-02-09 03:10:50,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:10:51,054 INFO L225 Difference]: With dead ends: 19035 [2022-02-09 03:10:51,054 INFO L226 Difference]: Without dead ends: 19007 [2022-02-09 03:10:51,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=749, Invalid=6733, Unknown=0, NotChecked=0, Total=7482 [2022-02-09 03:10:51,055 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, 2.1s IncrementalHoareTripleChecker+Time [2022-02-09 03:10:51,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [978 Valid, 1515 Invalid, 5076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 4852 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-09 03:10:51,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19007 states. [2022-02-09 03:10:51,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19007 to 16766. [2022-02-09 03:10:51,501 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) [2022-02-09 03:10:51,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16766 states to 16766 states and 78543 transitions. [2022-02-09 03:10:51,576 INFO L78 Accepts]: Start accepts. Automaton has 16766 states and 78543 transitions. Word has length 33 [2022-02-09 03:10:51,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:10:51,576 INFO L470 AbstractCegarLoop]: Abstraction has 16766 states and 78543 transitions. [2022-02-09 03:10:51,576 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) [2022-02-09 03:10:51,577 INFO L276 IsEmpty]: Start isEmpty. Operand 16766 states and 78543 transitions. [2022-02-09 03:10:51,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:10:51,621 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:10:51,621 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] [2022-02-09 03:10:51,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2022-02-09 03:10:51,835 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 [2022-02-09 03:10:51,835 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:10:51,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:10:51,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1684677661, now seen corresponding path program 103 times [2022-02-09 03:10:51,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:10:51,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99987290] [2022-02-09 03:10:51,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:10:51,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:10:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:10:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:52,000 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:10:52,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99987290] [2022-02-09 03:10:52,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99987290] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:10:52,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114957563] [2022-02-09 03:10:52,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:10:52,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:10:52,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:10:52,002 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) [2022-02-09 03:10:52,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-02-09 03:10:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:10:52,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:10:52,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:10:52,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:10:52,539 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 [2022-02-09 03:10:52,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:52,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:10:52,864 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:10:52,879 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 [2022-02-09 03:10:52,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:10:52,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:10:52,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:10:52,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:10:52,951 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 [2022-02-09 03:10:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:52,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114957563] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:10:52,989 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:10:52,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:10:52,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909585439] [2022-02-09 03:10:52,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:10:52,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:10:52,989 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:10:52,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:10:52,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:10:52,990 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) [2022-02-09 03:10:55,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:10:55,597 INFO L93 Difference]: Finished difference Result 18071 states and 83467 transitions. [2022-02-09 03:10:55,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-09 03:10:55,597 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 [2022-02-09 03:10:55,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:10:55,673 INFO L225 Difference]: With dead ends: 18071 [2022-02-09 03:10:55,673 INFO L226 Difference]: Without dead ends: 18036 [2022-02-09 03:10:55,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=398, Invalid=4714, Unknown=0, NotChecked=0, Total=5112 [2022-02-09 03:10:55,675 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 517 mSDsluCounter, 3554 mSDsCounter, 0 mSdLazyCounter, 4589 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:10:55,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 1512 Invalid, 4934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 4589 Invalid, 0 Unknown, 268 Unchecked, 1.5s Time] [2022-02-09 03:10:55,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18036 states. [2022-02-09 03:10:56,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18036 to 16778. [2022-02-09 03:10:56,105 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) [2022-02-09 03:10:56,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16778 states to 16778 states and 78592 transitions. [2022-02-09 03:10:56,171 INFO L78 Accepts]: Start accepts. Automaton has 16778 states and 78592 transitions. Word has length 33 [2022-02-09 03:10:56,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:10:56,171 INFO L470 AbstractCegarLoop]: Abstraction has 16778 states and 78592 transitions. [2022-02-09 03:10:56,171 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) [2022-02-09 03:10:56,172 INFO L276 IsEmpty]: Start isEmpty. Operand 16778 states and 78592 transitions. [2022-02-09 03:10:56,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:10:56,210 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:10:56,210 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] [2022-02-09 03:10:56,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-02-09 03:10:56,425 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 [2022-02-09 03:10:56,425 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:10:56,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:10:56,426 INFO L85 PathProgramCache]: Analyzing trace with hash 833944483, now seen corresponding path program 104 times [2022-02-09 03:10:56,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:10:56,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976842450] [2022-02-09 03:10:56,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:10:56,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:10:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:10:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:56,618 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:10:56,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976842450] [2022-02-09 03:10:56,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976842450] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:10:56,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813275289] [2022-02-09 03:10:56,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:10:56,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:10:56,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:10:56,619 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) [2022-02-09 03:10:56,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-02-09 03:10:56,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:10:56,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:10:56,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2022-02-09 03:10:56,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:10:57,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:10:57,121 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:10:57,122 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 [2022-02-09 03:10:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:57,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:10:57,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:10:57,784 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 [2022-02-09 03:10:57,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:10:57,793 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 [2022-02-09 03:10:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:10:57,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813275289] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:10:57,836 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:10:57,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-09 03:10:57,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147834834] [2022-02-09 03:10:57,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:10:57,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:10:57,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:10:57,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:10:57,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:10:57,837 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) [2022-02-09 03:10:59,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:10:59,549 INFO L93 Difference]: Finished difference Result 17477 states and 81292 transitions. [2022-02-09 03:10:59,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-09 03:10:59,549 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 [2022-02-09 03:10:59,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:10:59,625 INFO L225 Difference]: With dead ends: 17477 [2022-02-09 03:10:59,625 INFO L226 Difference]: Without dead ends: 17465 [2022-02-09 03:10:59,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=329, Invalid=2863, Unknown=0, NotChecked=0, Total=3192 [2022-02-09 03:10:59,626 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 570 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 2383 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-02-09 03:10:59,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 867 Invalid, 2769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2383 Invalid, 0 Unknown, 277 Unchecked, 0.9s Time] [2022-02-09 03:10:59,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17465 states. [2022-02-09 03:11:00,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17465 to 16810. [2022-02-09 03:11:00,057 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) [2022-02-09 03:11:00,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16810 states to 16810 states and 78719 transitions. [2022-02-09 03:11:00,133 INFO L78 Accepts]: Start accepts. Automaton has 16810 states and 78719 transitions. Word has length 33 [2022-02-09 03:11:00,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:11:00,133 INFO L470 AbstractCegarLoop]: Abstraction has 16810 states and 78719 transitions. [2022-02-09 03:11:00,133 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) [2022-02-09 03:11:00,133 INFO L276 IsEmpty]: Start isEmpty. Operand 16810 states and 78719 transitions. [2022-02-09 03:11:00,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:11:00,178 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:11:00,178 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] [2022-02-09 03:11:00,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2022-02-09 03:11:00,402 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 [2022-02-09 03:11:00,402 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:11:00,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:11:00,403 INFO L85 PathProgramCache]: Analyzing trace with hash 637430978, now seen corresponding path program 3 times [2022-02-09 03:11:00,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:11:00,403 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580644067] [2022-02-09 03:11:00,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:11:00,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:11:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:11:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:00,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:11:00,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580644067] [2022-02-09 03:11:00,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580644067] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:11:00,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290124746] [2022-02-09 03:11:00,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:11:00,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:11:00,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:11:00,630 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) [2022-02-09 03:11:00,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-02-09 03:11:00,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-09 03:11:00,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:11:00,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-09 03:11:00,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:11:01,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:11:01,137 INFO L353 Elim1Store]: treesize reduction 14, result has 74.5 percent of original size [2022-02-09 03:11:01,138 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 29 treesize of output 55 [2022-02-09 03:11:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:01,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:11:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:01,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290124746] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:11:01,664 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:11:01,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-02-09 03:11:01,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996478166] [2022-02-09 03:11:01,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:11:01,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-09 03:11:01,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:11:01,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-09 03:11:01,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2022-02-09 03:11:01,665 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) [2022-02-09 03:11:06,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:11:06,766 INFO L93 Difference]: Finished difference Result 19887 states and 90051 transitions. [2022-02-09 03:11:06,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-09 03:11:06,766 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 [2022-02-09 03:11:06,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:11:06,857 INFO L225 Difference]: With dead ends: 19887 [2022-02-09 03:11:06,857 INFO L226 Difference]: Without dead ends: 19858 [2022-02-09 03:11:06,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3247 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1000, Invalid=9920, Unknown=0, NotChecked=0, Total=10920 [2022-02-09 03:11:06,859 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1111 mSDsluCounter, 3609 mSDsCounter, 0 mSdLazyCounter, 4855 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:11:06,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1111 Valid, 1555 Invalid, 5094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 4855 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-09 03:11:06,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19858 states. [2022-02-09 03:11:07,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19858 to 16910. [2022-02-09 03:11:07,400 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) [2022-02-09 03:11:07,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16910 states to 16910 states and 79234 transitions. [2022-02-09 03:11:07,469 INFO L78 Accepts]: Start accepts. Automaton has 16910 states and 79234 transitions. Word has length 33 [2022-02-09 03:11:07,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:11:07,469 INFO L470 AbstractCegarLoop]: Abstraction has 16910 states and 79234 transitions. [2022-02-09 03:11:07,469 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) [2022-02-09 03:11:07,469 INFO L276 IsEmpty]: Start isEmpty. Operand 16910 states and 79234 transitions. [2022-02-09 03:11:07,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:11:07,512 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:11:07,512 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] [2022-02-09 03:11:07,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2022-02-09 03:11:07,728 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 [2022-02-09 03:11:07,728 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:11:07,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:11:07,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1300681963, now seen corresponding path program 105 times [2022-02-09 03:11:07,729 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:11:07,729 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882200335] [2022-02-09 03:11:07,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:11:07,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:11:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:11:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:08,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:11:08,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882200335] [2022-02-09 03:11:08,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882200335] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:11:08,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718284190] [2022-02-09 03:11:08,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:11:08,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:11:08,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:11:08,018 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) [2022-02-09 03:11:08,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-02-09 03:11:08,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-09 03:11:08,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:11:08,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-09 03:11:08,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:11:08,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:11:08,551 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-09 03:11:08,551 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 [2022-02-09 03:11:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:08,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:11:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:09,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718284190] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:11:09,178 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:11:09,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-02-09 03:11:09,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626606905] [2022-02-09 03:11:09,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:11:09,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-09 03:11:09,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:11:09,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-09 03:11:09,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2022-02-09 03:11:09,179 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) [2022-02-09 03:11:14,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:11:14,573 INFO L93 Difference]: Finished difference Result 18729 states and 85992 transitions. [2022-02-09 03:11:14,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-09 03:11:14,574 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 [2022-02-09 03:11:14,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:11:14,646 INFO L225 Difference]: With dead ends: 18729 [2022-02-09 03:11:14,646 INFO L226 Difference]: Without dead ends: 18699 [2022-02-09 03:11:14,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=660, Invalid=8270, Unknown=0, NotChecked=0, Total=8930 [2022-02-09 03:11:14,647 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 826 mSDsluCounter, 4638 mSDsCounter, 0 mSdLazyCounter, 6257 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s 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, 2.9s IncrementalHoareTripleChecker+Time [2022-02-09 03:11:14,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 1859 Invalid, 6432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 6257 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-09 03:11:14,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18699 states. [2022-02-09 03:11:15,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18699 to 16910. [2022-02-09 03:11:15,128 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) [2022-02-09 03:11:15,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16910 states to 16910 states and 79235 transitions. [2022-02-09 03:11:15,197 INFO L78 Accepts]: Start accepts. Automaton has 16910 states and 79235 transitions. Word has length 33 [2022-02-09 03:11:15,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:11:15,197 INFO L470 AbstractCegarLoop]: Abstraction has 16910 states and 79235 transitions. [2022-02-09 03:11:15,197 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) [2022-02-09 03:11:15,197 INFO L276 IsEmpty]: Start isEmpty. Operand 16910 states and 79235 transitions. [2022-02-09 03:11:15,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:11:15,239 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:11:15,239 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] [2022-02-09 03:11:15,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2022-02-09 03:11:15,451 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 [2022-02-09 03:11:15,451 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:11:15,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:11:15,452 INFO L85 PathProgramCache]: Analyzing trace with hash -382321509, now seen corresponding path program 106 times [2022-02-09 03:11:15,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:11:15,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047398374] [2022-02-09 03:11:15,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:11:15,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:11:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:11:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:15,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:11:15,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047398374] [2022-02-09 03:11:15,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047398374] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:11:15,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590454401] [2022-02-09 03:11:15,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:11:15,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:11:15,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:11:15,631 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) [2022-02-09 03:11:15,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-02-09 03:11:15,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:11:15,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:11:15,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:11:15,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:11:16,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:11:16,011 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 [2022-02-09 03:11:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:16,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:11:16,385 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:11:16,385 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 [2022-02-09 03:11:16,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:11:16,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:11:16,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:11:16,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:11:16,465 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 [2022-02-09 03:11:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:16,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590454401] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:11:16,530 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:11:16,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-09 03:11:16,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305416083] [2022-02-09 03:11:16,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:11:16,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:11:16,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:11:16,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:11:16,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:11:16,531 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) [2022-02-09 03:11:20,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:11:20,229 INFO L93 Difference]: Finished difference Result 21206 states and 97010 transitions. [2022-02-09 03:11:20,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-09 03:11:20,229 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 [2022-02-09 03:11:20,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:11:20,318 INFO L225 Difference]: With dead ends: 21206 [2022-02-09 03:11:20,319 INFO L226 Difference]: Without dead ends: 21120 [2022-02-09 03:11:20,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=742, Invalid=5738, Unknown=0, NotChecked=0, Total=6480 [2022-02-09 03:11:20,320 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 811 mSDsluCounter, 3566 mSDsCounter, 0 mSdLazyCounter, 4854 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.2s IncrementalHoareTripleChecker+Time [2022-02-09 03:11:20,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [811 Valid, 1512 Invalid, 4982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 4854 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-09 03:11:20,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21120 states. [2022-02-09 03:11:20,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21120 to 17505. [2022-02-09 03:11:20,901 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) [2022-02-09 03:11:20,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17505 states to 17505 states and 82509 transitions. [2022-02-09 03:11:20,984 INFO L78 Accepts]: Start accepts. Automaton has 17505 states and 82509 transitions. Word has length 33 [2022-02-09 03:11:20,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:11:20,984 INFO L470 AbstractCegarLoop]: Abstraction has 17505 states and 82509 transitions. [2022-02-09 03:11:20,984 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) [2022-02-09 03:11:20,984 INFO L276 IsEmpty]: Start isEmpty. Operand 17505 states and 82509 transitions. [2022-02-09 03:11:21,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:11:21,032 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:11:21,032 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] [2022-02-09 03:11:21,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-02-09 03:11:21,247 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 [2022-02-09 03:11:21,247 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:11:21,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:11:21,248 INFO L85 PathProgramCache]: Analyzing trace with hash 920951097, now seen corresponding path program 107 times [2022-02-09 03:11:21,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:11:21,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046981043] [2022-02-09 03:11:21,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:11:21,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:11:21,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:11:21,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:21,441 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:11:21,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046981043] [2022-02-09 03:11:21,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046981043] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:11:21,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775612009] [2022-02-09 03:11:21,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:11:21,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:11:21,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:11:21,443 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) [2022-02-09 03:11:21,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-02-09 03:11:21,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-09 03:11:21,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:11:21,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:11:21,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:11:21,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:11:21,847 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 [2022-02-09 03:11:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:21,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:11:22,266 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:11:22,266 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 [2022-02-09 03:11:22,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:11:22,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:11:22,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:11:22,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:11:22,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-02-09 03:11:22,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:22,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775612009] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:11:22,390 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:11:22,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-02-09 03:11:22,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217453636] [2022-02-09 03:11:22,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:11:22,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-09 03:11:22,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:11:22,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-09 03:11:22,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2022-02-09 03:11:22,390 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) [2022-02-09 03:11:25,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:11:25,163 INFO L93 Difference]: Finished difference Result 20890 states and 95605 transitions. [2022-02-09 03:11:25,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-09 03:11:25,163 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 [2022-02-09 03:11:25,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:11:25,245 INFO L225 Difference]: With dead ends: 20890 [2022-02-09 03:11:25,246 INFO L226 Difference]: Without dead ends: 20781 [2022-02-09 03:11:25,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=584, Invalid=4386, Unknown=0, NotChecked=0, Total=4970 [2022-02-09 03:11:25,246 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 735 mSDsluCounter, 2896 mSDsCounter, 0 mSdLazyCounter, 3817 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:11:25,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [735 Valid, 1250 Invalid, 3912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 3817 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-09 03:11:25,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20781 states. [2022-02-09 03:11:25,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20781 to 17514. [2022-02-09 03:11:25,764 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) [2022-02-09 03:11:25,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17514 states to 17514 states and 82553 transitions. [2022-02-09 03:11:25,838 INFO L78 Accepts]: Start accepts. Automaton has 17514 states and 82553 transitions. Word has length 33 [2022-02-09 03:11:25,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:11:25,838 INFO L470 AbstractCegarLoop]: Abstraction has 17514 states and 82553 transitions. [2022-02-09 03:11:25,838 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) [2022-02-09 03:11:25,838 INFO L276 IsEmpty]: Start isEmpty. Operand 17514 states and 82553 transitions. [2022-02-09 03:11:25,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:11:25,882 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:11:25,882 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] [2022-02-09 03:11:25,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2022-02-09 03:11:26,083 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 [2022-02-09 03:11:26,083 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:11:26,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:11:26,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1364573623, now seen corresponding path program 108 times [2022-02-09 03:11:26,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:11:26,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131054686] [2022-02-09 03:11:26,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:11:26,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:11:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:11:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:26,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:11:26,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131054686] [2022-02-09 03:11:26,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131054686] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:11:26,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546787282] [2022-02-09 03:11:26,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:11:26,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:11:26,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:11:26,280 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) [2022-02-09 03:11:26,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-02-09 03:11:26,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-09 03:11:26,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:11:26,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:11:26,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:11:26,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:11:26,683 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-09 03:11:26,683 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 [2022-02-09 03:11:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:26,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:11:27,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:27,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546787282] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:11:27,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:11:27,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-02-09 03:11:27,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257519492] [2022-02-09 03:11:27,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:11:27,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:11:27,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:11:27,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:11:27,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:11:27,491 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) [2022-02-09 03:11:32,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:11:32,874 INFO L93 Difference]: Finished difference Result 20733 states and 96159 transitions. [2022-02-09 03:11:32,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-02-09 03:11:32,874 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 [2022-02-09 03:11:32,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:11:32,957 INFO L225 Difference]: With dead ends: 20733 [2022-02-09 03:11:32,957 INFO L226 Difference]: Without dead ends: 20675 [2022-02-09 03:11:32,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2816 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=880, Invalid=9020, Unknown=0, NotChecked=0, Total=9900 [2022-02-09 03:11:32,958 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 1051 mSDsluCounter, 4399 mSDsCounter, 0 mSdLazyCounter, 5924 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s 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, 2.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:11:32,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1051 Valid, 1864 Invalid, 6154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 5924 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-09 03:11:32,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20675 states. [2022-02-09 03:11:33,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20675 to 17778. [2022-02-09 03:11:33,449 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) [2022-02-09 03:11:33,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17778 states to 17778 states and 84047 transitions. [2022-02-09 03:11:33,522 INFO L78 Accepts]: Start accepts. Automaton has 17778 states and 84047 transitions. Word has length 33 [2022-02-09 03:11:33,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:11:33,522 INFO L470 AbstractCegarLoop]: Abstraction has 17778 states and 84047 transitions. [2022-02-09 03:11:33,522 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) [2022-02-09 03:11:33,523 INFO L276 IsEmpty]: Start isEmpty. Operand 17778 states and 84047 transitions. [2022-02-09 03:11:33,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:11:33,567 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:11:33,567 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] [2022-02-09 03:11:33,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2022-02-09 03:11:33,783 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 [2022-02-09 03:11:33,783 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:11:33,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:11:33,784 INFO L85 PathProgramCache]: Analyzing trace with hash 710882143, now seen corresponding path program 109 times [2022-02-09 03:11:33,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:11:33,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56509741] [2022-02-09 03:11:33,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:11:33,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:11:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:11:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:34,049 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:11:34,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56509741] [2022-02-09 03:11:34,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56509741] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:11:34,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104819122] [2022-02-09 03:11:34,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:11:34,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:11:34,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:11:34,051 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) [2022-02-09 03:11:34,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-02-09 03:11:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:11:34,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:11:34,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:11:34,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:11:34,458 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 [2022-02-09 03:11:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:34,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:11:34,905 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:11:34,905 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 [2022-02-09 03:11:34,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:11:34,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:11:34,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:11:34,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:11:34,969 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 [2022-02-09 03:11:35,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:35,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104819122] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:11:35,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:11:35,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:11:35,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117635554] [2022-02-09 03:11:35,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:11:35,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:11:35,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:11:35,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:11:35,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=970, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:11:35,015 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) [2022-02-09 03:11:39,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:11:39,226 INFO L93 Difference]: Finished difference Result 19986 states and 93007 transitions. [2022-02-09 03:11:39,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-09 03:11:39,226 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 [2022-02-09 03:11:39,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:11:39,306 INFO L225 Difference]: With dead ends: 19986 [2022-02-09 03:11:39,307 INFO L226 Difference]: Without dead ends: 19917 [2022-02-09 03:11:39,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=474, Invalid=5688, Unknown=0, NotChecked=0, Total=6162 [2022-02-09 03:11:39,307 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 545 mSDsluCounter, 4795 mSDsCounter, 0 mSdLazyCounter, 6511 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s 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, 2.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:11:39,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 2017 Invalid, 6608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 6511 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-09 03:11:39,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19917 states. [2022-02-09 03:11:39,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19917 to 17834. [2022-02-09 03:11:39,790 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) [2022-02-09 03:11:39,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17834 states to 17834 states and 84426 transitions. [2022-02-09 03:11:39,878 INFO L78 Accepts]: Start accepts. Automaton has 17834 states and 84426 transitions. Word has length 33 [2022-02-09 03:11:39,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:11:39,878 INFO L470 AbstractCegarLoop]: Abstraction has 17834 states and 84426 transitions. [2022-02-09 03:11:39,878 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) [2022-02-09 03:11:39,878 INFO L276 IsEmpty]: Start isEmpty. Operand 17834 states and 84426 transitions. [2022-02-09 03:11:40,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:11:40,052 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:11:40,052 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] [2022-02-09 03:11:40,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2022-02-09 03:11:40,267 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 [2022-02-09 03:11:40,267 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:11:40,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:11:40,268 INFO L85 PathProgramCache]: Analyzing trace with hash -464058405, now seen corresponding path program 110 times [2022-02-09 03:11:40,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:11:40,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913415821] [2022-02-09 03:11:40,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:11:40,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:11:40,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:11:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:40,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:11:40,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913415821] [2022-02-09 03:11:40,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913415821] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:11:40,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594063505] [2022-02-09 03:11:40,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:11:40,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:11:40,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:11:40,444 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) [2022-02-09 03:11:40,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-02-09 03:11:40,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:11:40,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:11:40,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:11:40,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:11:40,725 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:11:40,725 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 [2022-02-09 03:11:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:41,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:11:41,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:11:41,668 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-02-09 03:11:41,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:11:41,683 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 [2022-02-09 03:11:41,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:41,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594063505] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:11:41,719 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:11:41,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-09 03:11:41,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770915912] [2022-02-09 03:11:41,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:11:41,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:11:41,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:11:41,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:11:41,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:11:41,719 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) [2022-02-09 03:11:43,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:11:43,469 INFO L93 Difference]: Finished difference Result 18880 states and 88760 transitions. [2022-02-09 03:11:43,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-09 03:11:43,469 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 [2022-02-09 03:11:43,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:11:43,544 INFO L225 Difference]: With dead ends: 18880 [2022-02-09 03:11:43,544 INFO L226 Difference]: Without dead ends: 18873 [2022-02-09 03:11:43,545 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 [2022-02-09 03:11:43,545 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 510 mSDsluCounter, 1947 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-02-09 03:11:43,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 790 Invalid, 2789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 2228 Invalid, 0 Unknown, 437 Unchecked, 0.9s Time] [2022-02-09 03:11:43,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18873 states. [2022-02-09 03:11:43,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18873 to 17919. [2022-02-09 03:11:44,055 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) [2022-02-09 03:11:44,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17919 states to 17919 states and 84800 transitions. [2022-02-09 03:11:44,130 INFO L78 Accepts]: Start accepts. Automaton has 17919 states and 84800 transitions. Word has length 33 [2022-02-09 03:11:44,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:11:44,131 INFO L470 AbstractCegarLoop]: Abstraction has 17919 states and 84800 transitions. [2022-02-09 03:11:44,131 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) [2022-02-09 03:11:44,131 INFO L276 IsEmpty]: Start isEmpty. Operand 17919 states and 84800 transitions. [2022-02-09 03:11:44,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:11:44,177 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:11:44,177 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] [2022-02-09 03:11:44,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Forceful destruction successful, exit code 0 [2022-02-09 03:11:44,391 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 [2022-02-09 03:11:44,391 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:11:44,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:11:44,392 INFO L85 PathProgramCache]: Analyzing trace with hash 902108661, now seen corresponding path program 111 times [2022-02-09 03:11:44,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:11:44,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117242875] [2022-02-09 03:11:44,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:11:44,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:11:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:11:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:44,600 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:11:44,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117242875] [2022-02-09 03:11:44,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117242875] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:11:44,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200219622] [2022-02-09 03:11:44,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:11:44,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:11:44,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:11:44,601 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) [2022-02-09 03:11:44,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-02-09 03:11:44,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-09 03:11:44,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:11:44,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-09 03:11:44,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:11:44,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:11:44,940 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-09 03:11:44,940 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 [2022-02-09 03:11:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:45,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:11:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:45,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200219622] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:11:45,605 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:11:45,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-02-09 03:11:45,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315027742] [2022-02-09 03:11:45,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:11:45,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:11:45,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:11:45,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:11:45,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:11:45,606 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) [2022-02-09 03:11:50,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:11:50,685 INFO L93 Difference]: Finished difference Result 22258 states and 102848 transitions. [2022-02-09 03:11:50,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-09 03:11:50,685 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 [2022-02-09 03:11:50,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:11:50,771 INFO L225 Difference]: With dead ends: 22258 [2022-02-09 03:11:50,771 INFO L226 Difference]: Without dead ends: 22188 [2022-02-09 03:11:50,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2710 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1041, Invalid=8271, Unknown=0, NotChecked=0, Total=9312 [2022-02-09 03:11:50,772 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1104 mSDsluCounter, 3734 mSDsCounter, 0 mSdLazyCounter, 5163 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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 [2022-02-09 03:11:50,772 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] [2022-02-09 03:11:50,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22188 states. [2022-02-09 03:11:51,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22188 to 18428. [2022-02-09 03:11:51,414 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) [2022-02-09 03:11:51,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18428 states to 18428 states and 87630 transitions. [2022-02-09 03:11:51,500 INFO L78 Accepts]: Start accepts. Automaton has 18428 states and 87630 transitions. Word has length 33 [2022-02-09 03:11:51,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:11:51,500 INFO L470 AbstractCegarLoop]: Abstraction has 18428 states and 87630 transitions. [2022-02-09 03:11:51,500 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) [2022-02-09 03:11:51,500 INFO L276 IsEmpty]: Start isEmpty. Operand 18428 states and 87630 transitions. [2022-02-09 03:11:51,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:11:51,552 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:11:51,552 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] [2022-02-09 03:11:51,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Forceful destruction successful, exit code 0 [2022-02-09 03:11:51,771 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 [2022-02-09 03:11:51,772 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:11:51,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:11:51,772 INFO L85 PathProgramCache]: Analyzing trace with hash 839214201, now seen corresponding path program 112 times [2022-02-09 03:11:51,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:11:51,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183707134] [2022-02-09 03:11:51,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:11:51,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:11:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:11:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:51,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:11:51,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183707134] [2022-02-09 03:11:51,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183707134] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:11:51,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243625927] [2022-02-09 03:11:51,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:11:51,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:11:51,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:11:51,970 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) [2022-02-09 03:11:51,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-02-09 03:11:52,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:11:52,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:11:52,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:11:52,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:11:52,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:11:52,335 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 [2022-02-09 03:11:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:52,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:11:52,811 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:11:52,812 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 [2022-02-09 03:11:52,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:11:52,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:11:52,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:11:52,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:11:52,854 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 [2022-02-09 03:11:52,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:52,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243625927] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:11:52,893 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:11:52,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-09 03:11:52,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973056904] [2022-02-09 03:11:52,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:11:52,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:11:52,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:11:52,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:11:52,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:11:52,894 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) [2022-02-09 03:11:55,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:11:55,595 INFO L93 Difference]: Finished difference Result 21691 states and 100577 transitions. [2022-02-09 03:11:55,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-09 03:11:55,595 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 [2022-02-09 03:11:55,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:11:55,691 INFO L225 Difference]: With dead ends: 21691 [2022-02-09 03:11:55,691 INFO L226 Difference]: Without dead ends: 21601 [2022-02-09 03:11:55,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=589, Invalid=4241, Unknown=0, NotChecked=0, Total=4830 [2022-02-09 03:11:55,692 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 756 mSDsluCounter, 3488 mSDsCounter, 0 mSdLazyCounter, 4566 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:11:55,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [756 Valid, 1490 Invalid, 4698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 4566 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-09 03:11:55,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21601 states. [2022-02-09 03:11:56,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21601 to 18843. [2022-02-09 03:11:56,237 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) [2022-02-09 03:11:56,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18843 states to 18843 states and 89695 transitions. [2022-02-09 03:11:56,329 INFO L78 Accepts]: Start accepts. Automaton has 18843 states and 89695 transitions. Word has length 33 [2022-02-09 03:11:56,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:11:56,329 INFO L470 AbstractCegarLoop]: Abstraction has 18843 states and 89695 transitions. [2022-02-09 03:11:56,329 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) [2022-02-09 03:11:56,329 INFO L276 IsEmpty]: Start isEmpty. Operand 18843 states and 89695 transitions. [2022-02-09 03:11:56,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:11:56,381 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:11:56,381 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] [2022-02-09 03:11:56,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2022-02-09 03:11:56,595 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 [2022-02-09 03:11:56,595 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:11:56,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:11:56,596 INFO L85 PathProgramCache]: Analyzing trace with hash 785827681, now seen corresponding path program 113 times [2022-02-09 03:11:56,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:11:56,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44314116] [2022-02-09 03:11:56,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:11:56,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:11:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:11:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:56,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:11:56,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44314116] [2022-02-09 03:11:56,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44314116] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:11:56,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883371815] [2022-02-09 03:11:56,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:11:56,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:11:56,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:11:56,743 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) [2022-02-09 03:11:56,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-02-09 03:11:56,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-09 03:11:56,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:11:56,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-09 03:11:56,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:11:56,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:11:56,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:11:56,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:11:56,988 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 [2022-02-09 03:11:57,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:57,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:11:57,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:11:57,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:11:57,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:11:57,493 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:11:57,493 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 [2022-02-09 03:11:57,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:11:57,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:11:57,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:11:57,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:11:57,513 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 7 [2022-02-09 03:11:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:11:57,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883371815] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:11:57,568 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:11:57,568 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-02-09 03:11:57,568 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121241326] [2022-02-09 03:11:57,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:11:57,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-09 03:11:57,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:11:57,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-09 03:11:57,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2022-02-09 03:11:57,569 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) [2022-02-09 03:12:02,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:12:02,502 INFO L93 Difference]: Finished difference Result 23929 states and 110222 transitions. [2022-02-09 03:12:02,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-09 03:12:02,502 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 [2022-02-09 03:12:02,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:12:02,596 INFO L225 Difference]: With dead ends: 23929 [2022-02-09 03:12:02,596 INFO L226 Difference]: Without dead ends: 23916 [2022-02-09 03:12:02,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3617 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1480, Invalid=9232, Unknown=0, NotChecked=0, Total=10712 [2022-02-09 03:12:02,597 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 1022 mSDsluCounter, 4445 mSDsCounter, 0 mSdLazyCounter, 5420 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.3s IncrementalHoareTripleChecker+Time [2022-02-09 03:12:02,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 1915 Invalid, 6647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 5420 Invalid, 0 Unknown, 940 Unchecked, 2.3s Time] [2022-02-09 03:12:02,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23916 states. [2022-02-09 03:12:03,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23916 to 19280. [2022-02-09 03:12:03,142 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) [2022-02-09 03:12:03,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19280 states to 19280 states and 91704 transitions. [2022-02-09 03:12:03,343 INFO L78 Accepts]: Start accepts. Automaton has 19280 states and 91704 transitions. Word has length 33 [2022-02-09 03:12:03,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:12:03,343 INFO L470 AbstractCegarLoop]: Abstraction has 19280 states and 91704 transitions. [2022-02-09 03:12:03,344 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) [2022-02-09 03:12:03,344 INFO L276 IsEmpty]: Start isEmpty. Operand 19280 states and 91704 transitions. [2022-02-09 03:12:03,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:12:03,393 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:12:03,393 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] [2022-02-09 03:12:03,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Forceful destruction successful, exit code 0 [2022-02-09 03:12:03,606 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 [2022-02-09 03:12:03,606 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:12:03,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:12:03,607 INFO L85 PathProgramCache]: Analyzing trace with hash -376619487, now seen corresponding path program 114 times [2022-02-09 03:12:03,607 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:12:03,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747285771] [2022-02-09 03:12:03,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:12:03,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:12:03,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:12:03,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:03,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:12:03,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747285771] [2022-02-09 03:12:03,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747285771] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:12:03,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495456208] [2022-02-09 03:12:03,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:12:03,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:12:03,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:12:03,879 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) [2022-02-09 03:12:03,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-02-09 03:12:03,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-09 03:12:03,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:12:03,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:12:03,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:12:04,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:12:04,223 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-09 03:12:04,224 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 33 treesize of output 57 [2022-02-09 03:12:04,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:04,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:12:04,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:04,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495456208] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:12:04,801 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:12:04,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 31 [2022-02-09 03:12:04,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893117864] [2022-02-09 03:12:04,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:12:04,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:12:04,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:12:04,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:12:04,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:12:04,802 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) [2022-02-09 03:12:08,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:12:08,923 INFO L93 Difference]: Finished difference Result 22563 states and 104578 transitions. [2022-02-09 03:12:08,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-09 03:12:08,923 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 [2022-02-09 03:12:08,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:12:09,024 INFO L225 Difference]: With dead ends: 22563 [2022-02-09 03:12:09,024 INFO L226 Difference]: Without dead ends: 22483 [2022-02-09 03:12:09,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2619 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1108, Invalid=7822, Unknown=0, NotChecked=0, Total=8930 [2022-02-09 03:12:09,025 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1072 mSDsluCounter, 3887 mSDsCounter, 0 mSdLazyCounter, 5226 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.9s IncrementalHoareTripleChecker+Time [2022-02-09 03:12:09,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1072 Valid, 1653 Invalid, 5530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 5226 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-09 03:12:09,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22483 states. [2022-02-09 03:12:09,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22483 to 19163. [2022-02-09 03:12:09,628 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) [2022-02-09 03:12:09,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19163 states to 19163 states and 91167 transitions. [2022-02-09 03:12:09,703 INFO L78 Accepts]: Start accepts. Automaton has 19163 states and 91167 transitions. Word has length 33 [2022-02-09 03:12:09,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:12:09,703 INFO L470 AbstractCegarLoop]: Abstraction has 19163 states and 91167 transitions. [2022-02-09 03:12:09,704 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) [2022-02-09 03:12:09,704 INFO L276 IsEmpty]: Start isEmpty. Operand 19163 states and 91167 transitions. [2022-02-09 03:12:09,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:12:09,747 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:12:09,748 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] [2022-02-09 03:12:09,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Forceful destruction successful, exit code 0 [2022-02-09 03:12:09,963 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 [2022-02-09 03:12:09,964 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:12:09,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:12:09,964 INFO L85 PathProgramCache]: Analyzing trace with hash 55173915, now seen corresponding path program 115 times [2022-02-09 03:12:09,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:12:09,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241753825] [2022-02-09 03:12:09,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:12:09,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:12:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:12:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:10,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:12:10,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241753825] [2022-02-09 03:12:10,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241753825] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:12:10,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723617476] [2022-02-09 03:12:10,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:12:10,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:12:10,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:12:10,129 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) [2022-02-09 03:12:10,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-02-09 03:12:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:12:10,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:12:10,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:12:10,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:12:10,520 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 [2022-02-09 03:12:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:10,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:12:10,827 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:12:10,827 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 [2022-02-09 03:12:10,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:12:10,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:12:10,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:12:10,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:12:10,870 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 [2022-02-09 03:12:10,901 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:10,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723617476] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:12:10,901 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:12:10,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:12:10,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431232341] [2022-02-09 03:12:10,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:12:10,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:12:10,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:12:10,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:12:10,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:12:10,903 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) [2022-02-09 03:12:13,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:12:13,987 INFO L93 Difference]: Finished difference Result 20991 states and 98389 transitions. [2022-02-09 03:12:13,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-09 03:12:13,987 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 [2022-02-09 03:12:13,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:12:14,069 INFO L225 Difference]: With dead ends: 20991 [2022-02-09 03:12:14,069 INFO L226 Difference]: Without dead ends: 20979 [2022-02-09 03:12:14,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=489, Invalid=4481, Unknown=0, NotChecked=0, Total=4970 [2022-02-09 03:12:14,070 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 588 mSDsluCounter, 3038 mSDsCounter, 0 mSdLazyCounter, 3877 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:12:14,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 1335 Invalid, 4217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 3877 Invalid, 0 Unknown, 207 Unchecked, 1.7s Time] [2022-02-09 03:12:14,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20979 states. [2022-02-09 03:12:14,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20979 to 19312. [2022-02-09 03:12:14,619 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) [2022-02-09 03:12:14,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19312 states to 19312 states and 91742 transitions. [2022-02-09 03:12:14,702 INFO L78 Accepts]: Start accepts. Automaton has 19312 states and 91742 transitions. Word has length 33 [2022-02-09 03:12:14,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:12:14,702 INFO L470 AbstractCegarLoop]: Abstraction has 19312 states and 91742 transitions. [2022-02-09 03:12:14,702 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) [2022-02-09 03:12:14,702 INFO L276 IsEmpty]: Start isEmpty. Operand 19312 states and 91742 transitions. [2022-02-09 03:12:14,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:12:14,752 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:12:14,752 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] [2022-02-09 03:12:14,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2022-02-09 03:12:14,967 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 [2022-02-09 03:12:14,968 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:12:14,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:12:14,968 INFO L85 PathProgramCache]: Analyzing trace with hash -2063118535, now seen corresponding path program 116 times [2022-02-09 03:12:14,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:12:14,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121322723] [2022-02-09 03:12:14,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:12:14,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:12:14,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:12:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:15,187 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:12:15,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121322723] [2022-02-09 03:12:15,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121322723] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:12:15,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661457051] [2022-02-09 03:12:15,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:12:15,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:12:15,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:12:15,188 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) [2022-02-09 03:12:15,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-02-09 03:12:15,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:12:15,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:12:15,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:12:15,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:12:15,578 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:12:15,578 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 [2022-02-09 03:12:16,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:16,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:12:16,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:12:16,371 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 [2022-02-09 03:12:16,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:12:16,391 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 [2022-02-09 03:12:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:16,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661457051] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:12:16,438 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:12:16,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-09 03:12:16,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555174449] [2022-02-09 03:12:16,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:12:16,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:12:16,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:12:16,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:12:16,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:12:16,439 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) [2022-02-09 03:12:19,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:12:19,086 INFO L93 Difference]: Finished difference Result 20328 states and 96004 transitions. [2022-02-09 03:12:19,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-09 03:12:19,087 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 [2022-02-09 03:12:19,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:12:19,260 INFO L225 Difference]: With dead ends: 20328 [2022-02-09 03:12:19,260 INFO L226 Difference]: Without dead ends: 20317 [2022-02-09 03:12:19,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 44 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=517, Invalid=3773, Unknown=0, NotChecked=0, Total=4290 [2022-02-09 03:12:19,261 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 [2022-02-09 03:12:19,261 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] [2022-02-09 03:12:19,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20317 states. [2022-02-09 03:12:19,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20317 to 19337. [2022-02-09 03:12:19,697 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) [2022-02-09 03:12:19,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19337 states to 19337 states and 91823 transitions. [2022-02-09 03:12:19,800 INFO L78 Accepts]: Start accepts. Automaton has 19337 states and 91823 transitions. Word has length 33 [2022-02-09 03:12:19,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:12:19,800 INFO L470 AbstractCegarLoop]: Abstraction has 19337 states and 91823 transitions. [2022-02-09 03:12:19,800 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) [2022-02-09 03:12:19,800 INFO L276 IsEmpty]: Start isEmpty. Operand 19337 states and 91823 transitions. [2022-02-09 03:12:20,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:12:20,013 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:12:20,013 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] [2022-02-09 03:12:20,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2022-02-09 03:12:20,213 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 [2022-02-09 03:12:20,214 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:12:20,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:12:20,214 INFO L85 PathProgramCache]: Analyzing trace with hash -320308200, now seen corresponding path program 16 times [2022-02-09 03:12:20,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:12:20,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588290686] [2022-02-09 03:12:20,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:12:20,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:12:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:12:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:20,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:12:20,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588290686] [2022-02-09 03:12:20,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588290686] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:12:20,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587464898] [2022-02-09 03:12:20,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:12:20,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:12:20,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:12:20,465 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) [2022-02-09 03:12:20,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-02-09 03:12:20,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:12:20,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:12:20,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:12:20,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:12:20,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:12:20,832 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 [2022-02-09 03:12:20,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:20,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:12:21,403 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:12:21,404 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 [2022-02-09 03:12:21,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:12:21,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:12:21,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:12:21,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:12:21,480 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 [2022-02-09 03:12:21,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:21,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587464898] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:12:21,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:12:21,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:12:21,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785500970] [2022-02-09 03:12:21,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:12:21,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:12:21,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:12:21,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:12:21,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:12:21,543 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) [2022-02-09 03:12:24,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:12:24,757 INFO L93 Difference]: Finished difference Result 21020 states and 98464 transitions. [2022-02-09 03:12:24,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-09 03:12:24,758 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 [2022-02-09 03:12:24,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:12:24,836 INFO L225 Difference]: With dead ends: 21020 [2022-02-09 03:12:24,836 INFO L226 Difference]: Without dead ends: 20923 [2022-02-09 03:12:24,836 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 [2022-02-09 03:12:24,836 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 567 mSDsluCounter, 3606 mSDsCounter, 0 mSdLazyCounter, 4851 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.9s IncrementalHoareTripleChecker+Time [2022-02-09 03:12:24,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 1559 Invalid, 4979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 4851 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-09 03:12:24,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20923 states. [2022-02-09 03:12:25,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20923 to 19241. [2022-02-09 03:12:25,369 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) [2022-02-09 03:12:25,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19241 states to 19241 states and 91526 transitions. [2022-02-09 03:12:25,449 INFO L78 Accepts]: Start accepts. Automaton has 19241 states and 91526 transitions. Word has length 33 [2022-02-09 03:12:25,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:12:25,449 INFO L470 AbstractCegarLoop]: Abstraction has 19241 states and 91526 transitions. [2022-02-09 03:12:25,449 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) [2022-02-09 03:12:25,449 INFO L276 IsEmpty]: Start isEmpty. Operand 19241 states and 91526 transitions. [2022-02-09 03:12:25,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:12:25,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:12:25,495 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] [2022-02-09 03:12:25,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Forceful destruction successful, exit code 0 [2022-02-09 03:12:25,709 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 [2022-02-09 03:12:25,709 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:12:25,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:12:25,709 INFO L85 PathProgramCache]: Analyzing trace with hash -508423509, now seen corresponding path program 117 times [2022-02-09 03:12:25,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:12:25,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761047656] [2022-02-09 03:12:25,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:12:25,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:12:25,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:12:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:26,029 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:12:26,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761047656] [2022-02-09 03:12:26,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761047656] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:12:26,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918468570] [2022-02-09 03:12:26,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:12:26,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:12:26,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:12:26,031 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) [2022-02-09 03:12:26,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-02-09 03:12:26,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-09 03:12:26,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:12:26,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:12:26,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:12:26,358 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:12:26,358 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 [2022-02-09 03:12:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:27,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:12:27,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:12:27,338 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 [2022-02-09 03:12:27,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:12:27,346 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 [2022-02-09 03:12:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:27,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918468570] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:12:27,384 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:12:27,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-02-09 03:12:27,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980484068] [2022-02-09 03:12:27,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:12:27,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:12:27,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:12:27,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:12:27,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:12:27,385 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) [2022-02-09 03:12:29,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:12:29,002 INFO L93 Difference]: Finished difference Result 19870 states and 93984 transitions. [2022-02-09 03:12:29,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-09 03:12:29,003 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 [2022-02-09 03:12:29,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:12:29,094 INFO L225 Difference]: With dead ends: 19870 [2022-02-09 03:12:29,094 INFO L226 Difference]: Without dead ends: 19859 [2022-02-09 03:12:29,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=321, Invalid=2435, Unknown=0, NotChecked=0, Total=2756 [2022-02-09 03:12:29,095 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 463 mSDsluCounter, 2118 mSDsCounter, 0 mSdLazyCounter, 2368 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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 [2022-02-09 03:12:29,095 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] [2022-02-09 03:12:29,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19859 states. [2022-02-09 03:12:29,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19859 to 19257. [2022-02-09 03:12:29,653 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) [2022-02-09 03:12:29,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19257 states to 19257 states and 91581 transitions. [2022-02-09 03:12:29,731 INFO L78 Accepts]: Start accepts. Automaton has 19257 states and 91581 transitions. Word has length 33 [2022-02-09 03:12:29,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:12:29,731 INFO L470 AbstractCegarLoop]: Abstraction has 19257 states and 91581 transitions. [2022-02-09 03:12:29,732 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) [2022-02-09 03:12:29,732 INFO L276 IsEmpty]: Start isEmpty. Operand 19257 states and 91581 transitions. [2022-02-09 03:12:29,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:12:29,778 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:12:29,778 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] [2022-02-09 03:12:29,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2022-02-09 03:12:29,991 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 [2022-02-09 03:12:29,991 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:12:29,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:12:29,992 INFO L85 PathProgramCache]: Analyzing trace with hash 379080172, now seen corresponding path program 17 times [2022-02-09 03:12:29,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:12:29,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119649215] [2022-02-09 03:12:29,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:12:29,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:12:29,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:12:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:30,207 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:12:30,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119649215] [2022-02-09 03:12:30,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119649215] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:12:30,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844797101] [2022-02-09 03:12:30,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:12:30,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:12:30,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:12:30,208 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) [2022-02-09 03:12:30,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-02-09 03:12:30,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-09 03:12:30,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:12:30,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:12:30,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:12:30,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:12:30,569 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 [2022-02-09 03:12:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:30,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:12:30,971 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:12:30,971 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 [2022-02-09 03:12:31,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:12:31,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:12:31,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:12:31,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:12:31,018 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 [2022-02-09 03:12:31,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:31,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844797101] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:12:31,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:12:31,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:12:31,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710688515] [2022-02-09 03:12:31,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:12:31,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:12:31,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:12:31,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:12:31,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:12:31,056 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) [2022-02-09 03:12:34,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:12:34,086 INFO L93 Difference]: Finished difference Result 21990 states and 102172 transitions. [2022-02-09 03:12:34,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-09 03:12:34,087 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 [2022-02-09 03:12:34,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:12:34,168 INFO L225 Difference]: With dead ends: 21990 [2022-02-09 03:12:34,168 INFO L226 Difference]: Without dead ends: 21866 [2022-02-09 03:12:34,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=618, Invalid=5234, Unknown=0, NotChecked=0, Total=5852 [2022-02-09 03:12:34,169 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 785 mSDsluCounter, 3450 mSDsCounter, 0 mSdLazyCounter, 4205 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-02-09 03:12:34,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 1486 Invalid, 4741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 4205 Invalid, 0 Unknown, 391 Unchecked, 1.6s Time] [2022-02-09 03:12:34,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21866 states. [2022-02-09 03:12:34,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21866 to 19015. [2022-02-09 03:12:34,717 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) [2022-02-09 03:12:34,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19015 states to 19015 states and 90532 transitions. [2022-02-09 03:12:34,798 INFO L78 Accepts]: Start accepts. Automaton has 19015 states and 90532 transitions. Word has length 33 [2022-02-09 03:12:34,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:12:34,799 INFO L470 AbstractCegarLoop]: Abstraction has 19015 states and 90532 transitions. [2022-02-09 03:12:34,799 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) [2022-02-09 03:12:34,799 INFO L276 IsEmpty]: Start isEmpty. Operand 19015 states and 90532 transitions. [2022-02-09 03:12:34,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:12:34,967 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:12:34,967 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] [2022-02-09 03:12:34,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2022-02-09 03:12:35,183 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 [2022-02-09 03:12:35,183 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:12:35,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:12:35,183 INFO L85 PathProgramCache]: Analyzing trace with hash -945888303, now seen corresponding path program 118 times [2022-02-09 03:12:35,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:12:35,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309950133] [2022-02-09 03:12:35,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:12:35,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:12:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:12:35,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:35,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:12:35,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309950133] [2022-02-09 03:12:35,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309950133] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:12:35,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498689997] [2022-02-09 03:12:35,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:12:35,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:12:35,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:12:35,406 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) [2022-02-09 03:12:35,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-02-09 03:12:35,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:12:35,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:12:35,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:12:35,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:12:35,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:12:35,791 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 [2022-02-09 03:12:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:35,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:12:36,202 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:12:36,202 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 [2022-02-09 03:12:36,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:12:36,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:12:36,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:12:36,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:12:36,261 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 7 [2022-02-09 03:12:36,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:36,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498689997] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:12:36,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:12:36,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-09 03:12:36,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806986081] [2022-02-09 03:12:36,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:12:36,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:12:36,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:12:36,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:12:36,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:12:36,317 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) [2022-02-09 03:12:39,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:12:39,373 INFO L93 Difference]: Finished difference Result 21715 states and 101365 transitions. [2022-02-09 03:12:39,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-09 03:12:39,373 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 [2022-02-09 03:12:39,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:12:39,513 INFO L225 Difference]: With dead ends: 21715 [2022-02-09 03:12:39,513 INFO L226 Difference]: Without dead ends: 21653 [2022-02-09 03:12:39,514 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 [2022-02-09 03:12:39,514 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 661 mSDsluCounter, 3430 mSDsCounter, 0 mSdLazyCounter, 4553 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-02-09 03:12:39,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 1486 Invalid, 5017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 4553 Invalid, 0 Unknown, 337 Unchecked, 1.8s Time] [2022-02-09 03:12:39,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21653 states. [2022-02-09 03:12:39,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21653 to 19385. [2022-02-09 03:12:39,998 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) [2022-02-09 03:12:40,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19385 states to 19385 states and 92242 transitions. [2022-02-09 03:12:40,238 INFO L78 Accepts]: Start accepts. Automaton has 19385 states and 92242 transitions. Word has length 33 [2022-02-09 03:12:40,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:12:40,238 INFO L470 AbstractCegarLoop]: Abstraction has 19385 states and 92242 transitions. [2022-02-09 03:12:40,238 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) [2022-02-09 03:12:40,238 INFO L276 IsEmpty]: Start isEmpty. Operand 19385 states and 92242 transitions. [2022-02-09 03:12:40,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:12:40,298 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:12:40,298 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] [2022-02-09 03:12:40,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-02-09 03:12:40,514 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 [2022-02-09 03:12:40,515 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:12:40,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:12:40,515 INFO L85 PathProgramCache]: Analyzing trace with hash 420278763, now seen corresponding path program 119 times [2022-02-09 03:12:40,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:12:40,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119225507] [2022-02-09 03:12:40,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:12:40,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:12:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:12:40,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:40,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:12:40,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119225507] [2022-02-09 03:12:40,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119225507] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:12:40,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869036026] [2022-02-09 03:12:40,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:12:40,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:12:40,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:12:40,709 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) [2022-02-09 03:12:40,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-02-09 03:12:40,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-09 03:12:40,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:12:40,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:12:40,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:12:41,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:12:41,126 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 [2022-02-09 03:12:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:41,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:12:41,458 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:12:41,458 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 [2022-02-09 03:12:41,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:12:41,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:12:41,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:12:41,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:12:41,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2022-02-09 03:12:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:41,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869036026] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:12:41,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:12:41,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-09 03:12:41,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375874308] [2022-02-09 03:12:41,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:12:41,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:12:41,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:12:41,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:12:41,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:12:41,602 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) [2022-02-09 03:12:44,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:12:44,482 INFO L93 Difference]: Finished difference Result 21591 states and 101078 transitions. [2022-02-09 03:12:44,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-09 03:12:44,482 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 [2022-02-09 03:12:44,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:12:44,569 INFO L225 Difference]: With dead ends: 21591 [2022-02-09 03:12:44,569 INFO L226 Difference]: Without dead ends: 21576 [2022-02-09 03:12:44,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=646, Invalid=5360, Unknown=0, NotChecked=0, Total=6006 [2022-02-09 03:12:44,570 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 649 mSDsluCounter, 2998 mSDsCounter, 0 mSdLazyCounter, 4066 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-02-09 03:12:44,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 1320 Invalid, 4349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 4066 Invalid, 0 Unknown, 168 Unchecked, 1.6s Time] [2022-02-09 03:12:44,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21576 states. [2022-02-09 03:12:45,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21576 to 19385. [2022-02-09 03:12:45,121 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) [2022-02-09 03:12:45,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19385 states to 19385 states and 92240 transitions. [2022-02-09 03:12:45,198 INFO L78 Accepts]: Start accepts. Automaton has 19385 states and 92240 transitions. Word has length 33 [2022-02-09 03:12:45,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:12:45,198 INFO L470 AbstractCegarLoop]: Abstraction has 19385 states and 92240 transitions. [2022-02-09 03:12:45,199 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) [2022-02-09 03:12:45,199 INFO L276 IsEmpty]: Start isEmpty. Operand 19385 states and 92240 transitions. [2022-02-09 03:12:45,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:12:45,246 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:12:45,246 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] [2022-02-09 03:12:45,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2022-02-09 03:12:45,462 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 [2022-02-09 03:12:45,462 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:12:45,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:12:45,463 INFO L85 PathProgramCache]: Analyzing trace with hash -2131878198, now seen corresponding path program 18 times [2022-02-09 03:12:45,463 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:12:45,463 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339688469] [2022-02-09 03:12:45,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:12:45,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:12:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:12:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:45,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:12:45,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339688469] [2022-02-09 03:12:45,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339688469] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:12:45,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737892172] [2022-02-09 03:12:45,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:12:45,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:12:45,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:12:45,660 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) [2022-02-09 03:12:45,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-02-09 03:12:45,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-09 03:12:45,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:12:45,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:12:45,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:12:46,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:12:46,033 INFO L353 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2022-02-09 03:12:46,033 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 [2022-02-09 03:12:46,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:46,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:12:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 03:12:46,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737892172] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:12:46,609 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:12:46,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-02-09 03:12:46,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135029685] [2022-02-09 03:12:46,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:12:46,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:12:46,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:12:46,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:12:46,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:12:46,610 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) [2022-02-09 03:12:51,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:12:51,641 INFO L93 Difference]: Finished difference Result 23518 states and 108687 transitions. [2022-02-09 03:12:51,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-09 03:12:51,642 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 [2022-02-09 03:12:51,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:12:51,729 INFO L225 Difference]: With dead ends: 23518 [2022-02-09 03:12:51,729 INFO L226 Difference]: Without dead ends: 23432 [2022-02-09 03:12:51,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2823 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=970, Invalid=8342, Unknown=0, NotChecked=0, Total=9312 [2022-02-09 03:12:51,730 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 1159 mSDsluCounter, 4187 mSDsCounter, 0 mSdLazyCounter, 5605 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s 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, 2.2s IncrementalHoareTripleChecker+Time [2022-02-09 03:12:51,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1159 Valid, 1761 Invalid, 5808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 5605 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-09 03:12:51,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23432 states. [2022-02-09 03:12:52,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23432 to 19539. [2022-02-09 03:12:52,314 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) [2022-02-09 03:12:52,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19539 states to 19539 states and 93165 transitions. [2022-02-09 03:12:52,395 INFO L78 Accepts]: Start accepts. Automaton has 19539 states and 93165 transitions. Word has length 33 [2022-02-09 03:12:52,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:12:52,395 INFO L470 AbstractCegarLoop]: Abstraction has 19539 states and 93165 transitions. [2022-02-09 03:12:52,395 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) [2022-02-09 03:12:52,395 INFO L276 IsEmpty]: Start isEmpty. Operand 19539 states and 93165 transitions. [2022-02-09 03:12:52,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:12:52,443 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:12:52,443 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] [2022-02-09 03:12:52,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2022-02-09 03:12:52,659 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 [2022-02-09 03:12:52,659 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:12:52,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:12:52,659 INFO L85 PathProgramCache]: Analyzing trace with hash 357384303, now seen corresponding path program 120 times [2022-02-09 03:12:52,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:12:52,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342691117] [2022-02-09 03:12:52,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:12:52,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:12:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:12:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:52,823 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:12:52,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342691117] [2022-02-09 03:12:52,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342691117] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:12:52,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628612871] [2022-02-09 03:12:52,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:12:52,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:12:52,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:12:52,828 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) [2022-02-09 03:12:52,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-02-09 03:12:52,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-09 03:12:52,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:12:52,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:12:52,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:12:53,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:12:53,171 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-09 03:12:53,172 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 [2022-02-09 03:12:53,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:53,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:12:53,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 03:12:53,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628612871] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:12:53,661 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:12:53,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 30 [2022-02-09 03:12:53,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119835829] [2022-02-09 03:12:53,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:12:53,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-09 03:12:53,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:12:53,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-09 03:12:53,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-02-09 03:12:53,662 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) [2022-02-09 03:12:58,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:12:58,108 INFO L93 Difference]: Finished difference Result 22700 states and 105207 transitions. [2022-02-09 03:12:58,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-09 03:12:58,108 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 [2022-02-09 03:12:58,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:12:58,302 INFO L225 Difference]: With dead ends: 22700 [2022-02-09 03:12:58,302 INFO L226 Difference]: Without dead ends: 22633 [2022-02-09 03:12:58,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2339 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=920, Invalid=7090, Unknown=0, NotChecked=0, Total=8010 [2022-02-09 03:12:58,302 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 1057 mSDsluCounter, 3518 mSDsCounter, 0 mSdLazyCounter, 4662 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.2s IncrementalHoareTripleChecker+Time [2022-02-09 03:12:58,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 1515 Invalid, 4880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 4662 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-09 03:12:58,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22633 states. [2022-02-09 03:12:58,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22633 to 19591. [2022-02-09 03:12:58,783 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) [2022-02-09 03:12:58,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19591 states to 19591 states and 93313 transitions. [2022-02-09 03:12:58,879 INFO L78 Accepts]: Start accepts. Automaton has 19591 states and 93313 transitions. Word has length 33 [2022-02-09 03:12:58,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:12:58,879 INFO L470 AbstractCegarLoop]: Abstraction has 19591 states and 93313 transitions. [2022-02-09 03:12:58,879 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) [2022-02-09 03:12:58,879 INFO L276 IsEmpty]: Start isEmpty. Operand 19591 states and 93313 transitions. [2022-02-09 03:12:58,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:12:58,925 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:12:58,925 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] [2022-02-09 03:12:58,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-02-09 03:12:59,137 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 [2022-02-09 03:12:59,137 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:12:59,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:12:59,138 INFO L85 PathProgramCache]: Analyzing trace with hash -541977769, now seen corresponding path program 121 times [2022-02-09 03:12:59,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:12:59,138 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063774032] [2022-02-09 03:12:59,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:12:59,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:12:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:12:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:12:59,640 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:12:59,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063774032] [2022-02-09 03:12:59,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063774032] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:12:59,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307865315] [2022-02-09 03:12:59,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:12:59,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:12:59,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:12:59,656 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) [2022-02-09 03:12:59,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-02-09 03:12:59,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:12:59,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:12:59,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:13:00,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:13:00,079 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 [2022-02-09 03:13:00,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:00,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:13:00,498 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:13:00,499 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 [2022-02-09 03:13:00,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:13:00,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:13:00,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:13:00,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:13:00,557 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 [2022-02-09 03:13:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:00,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307865315] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:13:00,610 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:13:00,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:13:00,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064719105] [2022-02-09 03:13:00,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:13:00,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:13:00,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:13:00,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:13:00,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:13:00,611 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) [2022-02-09 03:13:06,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:13:06,888 INFO L93 Difference]: Finished difference Result 24270 states and 110482 transitions. [2022-02-09 03:13:06,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-02-09 03:13:06,888 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 [2022-02-09 03:13:06,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:13:06,981 INFO L225 Difference]: With dead ends: 24270 [2022-02-09 03:13:06,982 INFO L226 Difference]: Without dead ends: 24206 [2022-02-09 03:13:06,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5083 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1605, Invalid=12675, Unknown=0, NotChecked=0, Total=14280 [2022-02-09 03:13:06,983 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 1200 mSDsluCounter, 4401 mSDsCounter, 0 mSdLazyCounter, 5277 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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, 2.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:13:06,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1200 Valid, 1845 Invalid, 5913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 5277 Invalid, 0 Unknown, 414 Unchecked, 2.5s Time] [2022-02-09 03:13:07,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24206 states. [2022-02-09 03:13:07,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24206 to 19929. [2022-02-09 03:13:07,640 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) [2022-02-09 03:13:07,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19929 states to 19929 states and 94874 transitions. [2022-02-09 03:13:07,841 INFO L78 Accepts]: Start accepts. Automaton has 19929 states and 94874 transitions. Word has length 33 [2022-02-09 03:13:07,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:13:07,841 INFO L470 AbstractCegarLoop]: Abstraction has 19929 states and 94874 transitions. [2022-02-09 03:13:07,841 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) [2022-02-09 03:13:07,841 INFO L276 IsEmpty]: Start isEmpty. Operand 19929 states and 94874 transitions. [2022-02-09 03:13:07,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:13:07,892 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:13:07,892 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] [2022-02-09 03:13:07,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Forceful destruction successful, exit code 0 [2022-02-09 03:13:08,108 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 [2022-02-09 03:13:08,109 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:13:08,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:13:08,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1972391225, now seen corresponding path program 122 times [2022-02-09 03:13:08,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:13:08,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634968258] [2022-02-09 03:13:08,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:13:08,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:13:08,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:13:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:08,380 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:13:08,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634968258] [2022-02-09 03:13:08,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634968258] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:13:08,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265290751] [2022-02-09 03:13:08,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:13:08,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:13:08,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:13:08,382 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) [2022-02-09 03:13:08,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-02-09 03:13:08,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:13:08,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:13:08,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:13:08,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:13:08,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:13:08,740 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 [2022-02-09 03:13:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:09,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:13:09,525 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:13:09,526 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 [2022-02-09 03:13:09,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:13:09,533 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 [2022-02-09 03:13:09,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:09,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265290751] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:13:09,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:13:09,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-02-09 03:13:09,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356355508] [2022-02-09 03:13:09,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:13:09,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-09 03:13:09,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:13:09,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-09 03:13:09,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=967, Unknown=0, NotChecked=0, Total=1122 [2022-02-09 03:13:09,568 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) [2022-02-09 03:13:14,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:13:14,645 INFO L93 Difference]: Finished difference Result 22889 states and 105042 transitions. [2022-02-09 03:13:14,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-09 03:13:14,645 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 [2022-02-09 03:13:14,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:13:14,748 INFO L225 Difference]: With dead ends: 22889 [2022-02-09 03:13:14,748 INFO L226 Difference]: Without dead ends: 22871 [2022-02-09 03:13:14,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2918 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1188, Invalid=7742, Unknown=0, NotChecked=0, Total=8930 [2022-02-09 03:13:14,749 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 1048 mSDsluCounter, 4519 mSDsCounter, 0 mSdLazyCounter, 5511 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s 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, 2.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:13:14,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1048 Valid, 1929 Invalid, 6403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 5511 Invalid, 0 Unknown, 690 Unchecked, 2.4s Time] [2022-02-09 03:13:14,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22871 states. [2022-02-09 03:13:15,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22871 to 19989. [2022-02-09 03:13:15,381 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) [2022-02-09 03:13:15,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19989 states to 19989 states and 95183 transitions. [2022-02-09 03:13:15,467 INFO L78 Accepts]: Start accepts. Automaton has 19989 states and 95183 transitions. Word has length 33 [2022-02-09 03:13:15,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:13:15,467 INFO L470 AbstractCegarLoop]: Abstraction has 19989 states and 95183 transitions. [2022-02-09 03:13:15,467 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) [2022-02-09 03:13:15,467 INFO L276 IsEmpty]: Start isEmpty. Operand 19989 states and 95183 transitions. [2022-02-09 03:13:15,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:13:15,527 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:13:15,527 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] [2022-02-09 03:13:15,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2022-02-09 03:13:15,744 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 [2022-02-09 03:13:15,744 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:13:15,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:13:15,744 INFO L85 PathProgramCache]: Analyzing trace with hash 303997783, now seen corresponding path program 123 times [2022-02-09 03:13:15,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:13:15,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810558978] [2022-02-09 03:13:15,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:13:15,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:13:15,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:13:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:16,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:13:16,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810558978] [2022-02-09 03:13:16,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810558978] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:13:16,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402360539] [2022-02-09 03:13:16,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:13:16,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:13:16,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:13:16,012 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) [2022-02-09 03:13:16,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-02-09 03:13:16,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-09 03:13:16,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:13:16,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-09 03:13:16,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:13:16,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:13:16,487 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-09 03:13:16,488 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 [2022-02-09 03:13:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:16,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:13:17,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 03:13:17,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402360539] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:13:17,056 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:13:17,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 33 [2022-02-09 03:13:17,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361830827] [2022-02-09 03:13:17,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:13:17,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-09 03:13:17,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:13:17,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-09 03:13:17,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2022-02-09 03:13:17,057 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) [2022-02-09 03:13:21,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:13:21,640 INFO L93 Difference]: Finished difference Result 23894 states and 108649 transitions. [2022-02-09 03:13:21,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-09 03:13:21,640 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 [2022-02-09 03:13:21,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:13:21,749 INFO L225 Difference]: With dead ends: 23894 [2022-02-09 03:13:21,749 INFO L226 Difference]: Without dead ends: 23856 [2022-02-09 03:13:21,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2501 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1096, Invalid=6736, Unknown=0, NotChecked=0, Total=7832 [2022-02-09 03:13:21,750 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1377 mSDsluCounter, 3630 mSDsCounter, 0 mSdLazyCounter, 4487 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 2.0s IncrementalHoareTripleChecker+Time [2022-02-09 03:13:21,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1377 Valid, 1503 Invalid, 4736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 4487 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-09 03:13:21,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23856 states. [2022-02-09 03:13:22,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23856 to 19903. [2022-02-09 03:13:22,445 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) [2022-02-09 03:13:22,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19903 states to 19903 states and 94752 transitions. [2022-02-09 03:13:22,541 INFO L78 Accepts]: Start accepts. Automaton has 19903 states and 94752 transitions. Word has length 33 [2022-02-09 03:13:22,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:13:22,541 INFO L470 AbstractCegarLoop]: Abstraction has 19903 states and 94752 transitions. [2022-02-09 03:13:22,541 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) [2022-02-09 03:13:22,541 INFO L276 IsEmpty]: Start isEmpty. Operand 19903 states and 94752 transitions. [2022-02-09 03:13:22,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:13:22,604 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:13:22,604 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] [2022-02-09 03:13:22,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2022-02-09 03:13:22,814 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 [2022-02-09 03:13:22,814 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:13:22,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:13:22,815 INFO L85 PathProgramCache]: Analyzing trace with hash -71060157, now seen corresponding path program 124 times [2022-02-09 03:13:22,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:13:22,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690274369] [2022-02-09 03:13:22,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:13:22,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:13:22,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:13:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:23,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:13:23,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690274369] [2022-02-09 03:13:23,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690274369] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:13:23,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890733006] [2022-02-09 03:13:23,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:13:23,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:13:23,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:13:23,093 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) [2022-02-09 03:13:23,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-02-09 03:13:23,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:13:23,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:13:23,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:13:23,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:13:23,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:13:23,481 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 [2022-02-09 03:13:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:23,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:13:23,898 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:13:23,898 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 [2022-02-09 03:13:23,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:13:23,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:13:23,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:13:23,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:13:23,964 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 [2022-02-09 03:13:24,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:24,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890733006] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:13:24,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:13:24,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:13:24,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994093923] [2022-02-09 03:13:24,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:13:24,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:13:24,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:13:24,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:13:24,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:13:24,006 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) [2022-02-09 03:13:29,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:13:29,429 INFO L93 Difference]: Finished difference Result 24130 states and 110129 transitions. [2022-02-09 03:13:29,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-09 03:13:29,429 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 [2022-02-09 03:13:29,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:13:29,516 INFO L225 Difference]: With dead ends: 24130 [2022-02-09 03:13:29,517 INFO L226 Difference]: Without dead ends: 23909 [2022-02-09 03:13:29,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3323 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1162, Invalid=8540, Unknown=0, NotChecked=0, Total=9702 [2022-02-09 03:13:29,517 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 1226 mSDsluCounter, 3742 mSDsCounter, 0 mSdLazyCounter, 4713 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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, 2.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:13:29,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1226 Valid, 1495 Invalid, 4937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 4713 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-09 03:13:29,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23909 states. [2022-02-09 03:13:30,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23909 to 19687. [2022-02-09 03:13:30,044 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) [2022-02-09 03:13:30,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19687 states to 19687 states and 93784 transitions. [2022-02-09 03:13:30,127 INFO L78 Accepts]: Start accepts. Automaton has 19687 states and 93784 transitions. Word has length 33 [2022-02-09 03:13:30,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:13:30,127 INFO L470 AbstractCegarLoop]: Abstraction has 19687 states and 93784 transitions. [2022-02-09 03:13:30,127 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) [2022-02-09 03:13:30,127 INFO L276 IsEmpty]: Start isEmpty. Operand 19687 states and 93784 transitions. [2022-02-09 03:13:30,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:13:30,213 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:13:30,213 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] [2022-02-09 03:13:30,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2022-02-09 03:13:30,429 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 [2022-02-09 03:13:30,429 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:13:30,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:13:30,430 INFO L85 PathProgramCache]: Analyzing trace with hash -426655983, now seen corresponding path program 125 times [2022-02-09 03:13:30,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:13:30,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870538840] [2022-02-09 03:13:30,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:13:30,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:13:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:13:30,774 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:30,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:13:30,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870538840] [2022-02-09 03:13:30,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870538840] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:13:30,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061164573] [2022-02-09 03:13:30,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:13:30,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:13:30,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:13:30,776 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) [2022-02-09 03:13:30,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-02-09 03:13:30,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-09 03:13:30,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:13:30,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:13:30,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:13:31,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:13:31,173 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 [2022-02-09 03:13:31,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:31,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:13:31,607 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:13:31,607 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 [2022-02-09 03:13:31,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:13:31,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:13:31,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:13:31,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:13:31,817 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 [2022-02-09 03:13:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:31,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061164573] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:13:31,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:13:31,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:13:31,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209323586] [2022-02-09 03:13:31,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:13:31,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:13:31,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:13:31,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:13:31,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:13:31,862 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) [2022-02-09 03:13:35,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:13:35,147 INFO L93 Difference]: Finished difference Result 21557 states and 101175 transitions. [2022-02-09 03:13:35,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-09 03:13:35,148 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 [2022-02-09 03:13:35,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:13:35,227 INFO L225 Difference]: With dead ends: 21557 [2022-02-09 03:13:35,228 INFO L226 Difference]: Without dead ends: 21383 [2022-02-09 03:13:35,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=496, Invalid=5054, Unknown=0, NotChecked=0, Total=5550 [2022-02-09 03:13:35,228 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 671 mSDsluCounter, 3265 mSDsCounter, 0 mSdLazyCounter, 4398 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.9s IncrementalHoareTripleChecker+Time [2022-02-09 03:13:35,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [671 Valid, 1340 Invalid, 4528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 4398 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-09 03:13:35,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21383 states. [2022-02-09 03:13:35,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21383 to 19682. [2022-02-09 03:13:35,741 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) [2022-02-09 03:13:35,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19682 states to 19682 states and 93922 transitions. [2022-02-09 03:13:35,825 INFO L78 Accepts]: Start accepts. Automaton has 19682 states and 93922 transitions. Word has length 33 [2022-02-09 03:13:35,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:13:35,825 INFO L470 AbstractCegarLoop]: Abstraction has 19682 states and 93922 transitions. [2022-02-09 03:13:35,825 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) [2022-02-09 03:13:35,825 INFO L276 IsEmpty]: Start isEmpty. Operand 19682 states and 93922 transitions. [2022-02-09 03:13:35,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:13:35,874 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:13:35,874 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] [2022-02-09 03:13:35,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2022-02-09 03:13:36,087 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 [2022-02-09 03:13:36,087 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:13:36,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:13:36,088 INFO L85 PathProgramCache]: Analyzing trace with hash -670572553, now seen corresponding path program 126 times [2022-02-09 03:13:36,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:13:36,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34114208] [2022-02-09 03:13:36,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:13:36,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:13:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:13:36,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:36,281 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:13:36,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34114208] [2022-02-09 03:13:36,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34114208] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:13:36,281 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493646141] [2022-02-09 03:13:36,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:13:36,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:13:36,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:13:36,282 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) [2022-02-09 03:13:36,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-02-09 03:13:36,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-09 03:13:36,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:13:36,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:13:36,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:13:36,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:13:36,786 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-09 03:13:36,787 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 [2022-02-09 03:13:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:36,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:13:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:37,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493646141] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:13:37,422 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:13:37,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-09 03:13:37,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296084283] [2022-02-09 03:13:37,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:13:37,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-09 03:13:37,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:13:37,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-09 03:13:37,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2022-02-09 03:13:37,423 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) [2022-02-09 03:13:43,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:13:43,064 INFO L93 Difference]: Finished difference Result 23350 states and 108122 transitions. [2022-02-09 03:13:43,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-02-09 03:13:43,064 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 [2022-02-09 03:13:43,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:13:43,156 INFO L225 Difference]: With dead ends: 23350 [2022-02-09 03:13:43,156 INFO L226 Difference]: Without dead ends: 23242 [2022-02-09 03:13:43,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3810 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=980, Invalid=11902, Unknown=0, NotChecked=0, Total=12882 [2022-02-09 03:13:43,157 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 1155 mSDsluCounter, 4617 mSDsCounter, 0 mSdLazyCounter, 6035 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s 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, 2.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:13:43,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1155 Valid, 1876 Invalid, 6265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 6035 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-09 03:13:43,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23242 states. [2022-02-09 03:13:43,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23242 to 19868. [2022-02-09 03:13:43,756 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) [2022-02-09 03:13:43,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19868 states to 19868 states and 94944 transitions. [2022-02-09 03:13:43,846 INFO L78 Accepts]: Start accepts. Automaton has 19868 states and 94944 transitions. Word has length 33 [2022-02-09 03:13:43,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:13:43,846 INFO L470 AbstractCegarLoop]: Abstraction has 19868 states and 94944 transitions. [2022-02-09 03:13:43,846 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) [2022-02-09 03:13:43,846 INFO L276 IsEmpty]: Start isEmpty. Operand 19868 states and 94944 transitions. [2022-02-09 03:13:43,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:13:43,896 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:13:43,896 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] [2022-02-09 03:13:43,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2022-02-09 03:13:44,113 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 [2022-02-09 03:13:44,113 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:13:44,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:13:44,113 INFO L85 PathProgramCache]: Analyzing trace with hash -787468167, now seen corresponding path program 127 times [2022-02-09 03:13:44,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:13:44,114 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816070272] [2022-02-09 03:13:44,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:13:44,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:13:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:13:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:44,326 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:13:44,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816070272] [2022-02-09 03:13:44,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816070272] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:13:44,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611202922] [2022-02-09 03:13:44,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:13:44,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:13:44,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:13:44,327 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) [2022-02-09 03:13:44,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-02-09 03:13:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:13:44,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:13:44,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:13:44,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:13:44,744 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 [2022-02-09 03:13:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:44,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:13:45,161 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:13:45,162 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 [2022-02-09 03:13:45,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:13:45,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:13:45,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:13:45,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:13:45,221 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 [2022-02-09 03:13:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:45,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611202922] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:13:45,280 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:13:45,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-09 03:13:45,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458167142] [2022-02-09 03:13:45,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:13:45,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:13:45,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:13:45,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:13:45,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:13:45,281 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) [2022-02-09 03:13:48,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:13:48,425 INFO L93 Difference]: Finished difference Result 24624 states and 114063 transitions. [2022-02-09 03:13:48,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-09 03:13:48,425 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 [2022-02-09 03:13:48,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:13:48,517 INFO L225 Difference]: With dead ends: 24624 [2022-02-09 03:13:48,518 INFO L226 Difference]: Without dead ends: 24563 [2022-02-09 03:13:48,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1985 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=712, Invalid=5930, Unknown=0, NotChecked=0, Total=6642 [2022-02-09 03:13:48,518 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 [2022-02-09 03:13:48,518 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] [2022-02-09 03:13:48,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24563 states. [2022-02-09 03:13:49,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24563 to 20222. [2022-02-09 03:13:49,179 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) [2022-02-09 03:13:49,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20222 states to 20222 states and 96901 transitions. [2022-02-09 03:13:49,265 INFO L78 Accepts]: Start accepts. Automaton has 20222 states and 96901 transitions. Word has length 33 [2022-02-09 03:13:49,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:13:49,265 INFO L470 AbstractCegarLoop]: Abstraction has 20222 states and 96901 transitions. [2022-02-09 03:13:49,265 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) [2022-02-09 03:13:49,265 INFO L276 IsEmpty]: Start isEmpty. Operand 20222 states and 96901 transitions. [2022-02-09 03:13:49,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:13:49,315 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:13:49,315 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] [2022-02-09 03:13:49,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Ended with exit code 0 [2022-02-09 03:13:49,531 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 [2022-02-09 03:13:49,532 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:13:49,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:13:49,532 INFO L85 PathProgramCache]: Analyzing trace with hash 515804439, now seen corresponding path program 128 times [2022-02-09 03:13:49,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:13:49,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021783597] [2022-02-09 03:13:49,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:13:49,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:13:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:13:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:49,709 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:13:49,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021783597] [2022-02-09 03:13:49,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021783597] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:13:49,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923573894] [2022-02-09 03:13:49,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:13:49,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:13:49,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:13:49,711 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) [2022-02-09 03:13:49,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-02-09 03:13:49,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:13:49,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:13:49,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:13:49,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:13:50,040 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:13:50,040 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 [2022-02-09 03:13:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:50,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:13:50,749 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:13:50,749 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 [2022-02-09 03:13:50,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:13:50,759 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 [2022-02-09 03:13:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:50,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923573894] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:13:50,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:13:50,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 28 [2022-02-09 03:13:50,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417783429] [2022-02-09 03:13:50,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:13:50,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-09 03:13:50,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:13:50,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-09 03:13:50,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-02-09 03:13:50,815 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) [2022-02-09 03:13:52,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:13:52,968 INFO L93 Difference]: Finished difference Result 21298 states and 101161 transitions. [2022-02-09 03:13:52,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-09 03:13:52,968 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 [2022-02-09 03:13:52,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:13:53,052 INFO L225 Difference]: With dead ends: 21298 [2022-02-09 03:13:53,052 INFO L226 Difference]: Without dead ends: 21287 [2022-02-09 03:13:53,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=391, Invalid=2471, Unknown=0, NotChecked=0, Total=2862 [2022-02-09 03:13:53,053 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, 1.1s IncrementalHoareTripleChecker+Time [2022-02-09 03:13:53,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 983 Invalid, 3500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2583 Invalid, 0 Unknown, 857 Unchecked, 1.1s Time] [2022-02-09 03:13:53,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21287 states. [2022-02-09 03:13:53,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21287 to 20279. [2022-02-09 03:13:53,709 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) [2022-02-09 03:13:53,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20279 states to 20279 states and 97144 transitions. [2022-02-09 03:13:53,796 INFO L78 Accepts]: Start accepts. Automaton has 20279 states and 97144 transitions. Word has length 33 [2022-02-09 03:13:53,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:13:53,796 INFO L470 AbstractCegarLoop]: Abstraction has 20279 states and 97144 transitions. [2022-02-09 03:13:53,796 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) [2022-02-09 03:13:53,796 INFO L276 IsEmpty]: Start isEmpty. Operand 20279 states and 97144 transitions. [2022-02-09 03:13:53,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:13:53,848 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:13:53,848 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] [2022-02-09 03:13:53,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Forceful destruction successful, exit code 0 [2022-02-09 03:13:54,064 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 [2022-02-09 03:13:54,064 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:13:54,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:13:54,065 INFO L85 PathProgramCache]: Analyzing trace with hash 319290934, now seen corresponding path program 19 times [2022-02-09 03:13:54,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:13:54,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35758844] [2022-02-09 03:13:54,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:13:54,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:13:54,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:13:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:54,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:13:54,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35758844] [2022-02-09 03:13:54,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35758844] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:13:54,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54466497] [2022-02-09 03:13:54,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:13:54,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:13:54,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:13:54,251 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) [2022-02-09 03:13:54,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-02-09 03:13:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:13:54,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:13:54,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:13:54,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:13:54,644 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 [2022-02-09 03:13:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:54,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:13:55,057 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:13:55,057 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 [2022-02-09 03:13:55,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:13:55,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:13:55,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:13:55,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:13:55,127 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 [2022-02-09 03:13:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:55,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54466497] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:13:55,181 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:13:55,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-02-09 03:13:55,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208849902] [2022-02-09 03:13:55,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:13:55,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-09 03:13:55,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:13:55,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-09 03:13:55,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2022-02-09 03:13:55,182 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) [2022-02-09 03:13:58,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:13:58,653 INFO L93 Difference]: Finished difference Result 24051 states and 111704 transitions. [2022-02-09 03:13:58,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-09 03:13:58,654 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 [2022-02-09 03:13:58,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:13:58,749 INFO L225 Difference]: With dead ends: 24051 [2022-02-09 03:13:58,749 INFO L226 Difference]: Without dead ends: 23927 [2022-02-09 03:13:58,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=608, Invalid=5092, Unknown=0, NotChecked=0, Total=5700 [2022-02-09 03:13:58,750 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 651 mSDsluCounter, 3715 mSDsCounter, 0 mSdLazyCounter, 4545 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 2.2s IncrementalHoareTripleChecker+Time [2022-02-09 03:13:58,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 1605 Invalid, 5328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 4545 Invalid, 0 Unknown, 680 Unchecked, 2.2s Time] [2022-02-09 03:13:58,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23927 states. [2022-02-09 03:13:59,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23927 to 20060. [2022-02-09 03:13:59,414 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) [2022-02-09 03:13:59,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20060 states to 20060 states and 96144 transitions. [2022-02-09 03:13:59,489 INFO L78 Accepts]: Start accepts. Automaton has 20060 states and 96144 transitions. Word has length 33 [2022-02-09 03:13:59,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:13:59,490 INFO L470 AbstractCegarLoop]: Abstraction has 20060 states and 96144 transitions. [2022-02-09 03:13:59,490 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) [2022-02-09 03:13:59,490 INFO L276 IsEmpty]: Start isEmpty. Operand 20060 states and 96144 transitions. [2022-02-09 03:13:59,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:13:59,534 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:13:59,534 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] [2022-02-09 03:13:59,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Forceful destruction successful, exit code 0 [2022-02-09 03:13:59,747 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 [2022-02-09 03:13:59,747 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:13:59,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:13:59,748 INFO L85 PathProgramCache]: Analyzing trace with hash 305735485, now seen corresponding path program 129 times [2022-02-09 03:13:59,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:13:59,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952527003] [2022-02-09 03:13:59,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:13:59,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:13:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:13:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:13:59,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:13:59,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952527003] [2022-02-09 03:13:59,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952527003] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:13:59,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587081666] [2022-02-09 03:13:59,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:13:59,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:13:59,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:13:59,939 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) [2022-02-09 03:13:59,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-02-09 03:13:59,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-09 03:13:59,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:13:59,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-09 03:13:59,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:14:00,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:14:00,458 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-09 03:14:00,459 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 [2022-02-09 03:14:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:00,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:14:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:01,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587081666] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:14:01,040 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:14:01,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2022-02-09 03:14:01,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081743216] [2022-02-09 03:14:01,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:14:01,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-09 03:14:01,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:14:01,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-09 03:14:01,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2022-02-09 03:14:01,041 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) [2022-02-09 03:14:07,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:14:07,739 INFO L93 Difference]: Finished difference Result 23691 states and 109980 transitions. [2022-02-09 03:14:07,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-09 03:14:07,739 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 [2022-02-09 03:14:07,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:14:07,831 INFO L225 Difference]: With dead ends: 23691 [2022-02-09 03:14:07,831 INFO L226 Difference]: Without dead ends: 23625 [2022-02-09 03:14:07,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2986 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=855, Invalid=10065, Unknown=0, NotChecked=0, Total=10920 [2022-02-09 03:14:07,832 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 938 mSDsluCounter, 5684 mSDsCounter, 0 mSdLazyCounter, 7452 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s 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, 3.5s IncrementalHoareTripleChecker+Time [2022-02-09 03:14:07,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [938 Valid, 2397 Invalid, 7642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 7452 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-02-09 03:14:07,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23625 states. [2022-02-09 03:14:08,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23625 to 20162. [2022-02-09 03:14:08,340 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) [2022-02-09 03:14:08,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20162 states to 20162 states and 96708 transitions. [2022-02-09 03:14:08,538 INFO L78 Accepts]: Start accepts. Automaton has 20162 states and 96708 transitions. Word has length 33 [2022-02-09 03:14:08,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:14:08,538 INFO L470 AbstractCegarLoop]: Abstraction has 20162 states and 96708 transitions. [2022-02-09 03:14:08,538 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) [2022-02-09 03:14:08,538 INFO L276 IsEmpty]: Start isEmpty. Operand 20162 states and 96708 transitions. [2022-02-09 03:14:08,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:14:08,588 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:14:08,588 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] [2022-02-09 03:14:08,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2022-02-09 03:14:08,804 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 [2022-02-09 03:14:08,804 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:14:08,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:14:08,805 INFO L85 PathProgramCache]: Analyzing trace with hash 739764831, now seen corresponding path program 130 times [2022-02-09 03:14:08,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:14:08,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357924535] [2022-02-09 03:14:08,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:14:08,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:14:08,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:14:09,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:09,013 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:14:09,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357924535] [2022-02-09 03:14:09,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357924535] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:14:09,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213346637] [2022-02-09 03:14:09,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:14:09,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:14:09,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:14:09,014 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) [2022-02-09 03:14:09,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-02-09 03:14:09,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:14:09,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:14:09,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:14:09,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:14:09,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:14:09,574 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 [2022-02-09 03:14:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:09,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:14:10,002 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:14:10,002 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 [2022-02-09 03:14:10,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:14:10,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:14:10,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:14:10,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:14:10,074 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 [2022-02-09 03:14:10,126 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:10,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213346637] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:14:10,126 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:14:10,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:14:10,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443799632] [2022-02-09 03:14:10,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:14:10,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:14:10,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:14:10,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:14:10,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:14:10,127 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) [2022-02-09 03:14:14,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:14:14,265 INFO L93 Difference]: Finished difference Result 23174 states and 108727 transitions. [2022-02-09 03:14:14,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-09 03:14:14,265 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 [2022-02-09 03:14:14,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:14:14,404 INFO L225 Difference]: With dead ends: 23174 [2022-02-09 03:14:14,404 INFO L226 Difference]: Without dead ends: 23115 [2022-02-09 03:14:14,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1483 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=463, Invalid=5087, Unknown=0, NotChecked=0, Total=5550 [2022-02-09 03:14:14,404 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 547 mSDsluCounter, 4679 mSDsCounter, 0 mSdLazyCounter, 6317 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s 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, 2.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:14:14,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 2000 Invalid, 6417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 6317 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-09 03:14:14,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23115 states. [2022-02-09 03:14:14,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23115 to 20207. [2022-02-09 03:14:14,947 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) [2022-02-09 03:14:15,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20207 states to 20207 states and 96966 transitions. [2022-02-09 03:14:15,034 INFO L78 Accepts]: Start accepts. Automaton has 20207 states and 96966 transitions. Word has length 33 [2022-02-09 03:14:15,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:14:15,034 INFO L470 AbstractCegarLoop]: Abstraction has 20207 states and 96966 transitions. [2022-02-09 03:14:15,034 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) [2022-02-09 03:14:15,034 INFO L276 IsEmpty]: Start isEmpty. Operand 20207 states and 96966 transitions. [2022-02-09 03:14:15,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:14:15,085 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:14:15,085 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] [2022-02-09 03:14:15,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-02-09 03:14:15,301 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 [2022-02-09 03:14:15,302 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:14:15,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:14:15,302 INFO L85 PathProgramCache]: Analyzing trace with hash -462595609, now seen corresponding path program 131 times [2022-02-09 03:14:15,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:14:15,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550164120] [2022-02-09 03:14:15,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:14:15,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:14:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:14:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:15,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:14:15,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550164120] [2022-02-09 03:14:15,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550164120] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:14:15,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507008073] [2022-02-09 03:14:15,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:14:15,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:14:15,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:14:15,493 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) [2022-02-09 03:14:15,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-02-09 03:14:15,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-09 03:14:15,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:14:15,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:14:15,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:14:15,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:14:15,849 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 [2022-02-09 03:14:15,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:15,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:14:16,299 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:14:16,300 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 [2022-02-09 03:14:16,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:14:16,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:14:16,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:14:16,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:14:16,340 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 [2022-02-09 03:14:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:16,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507008073] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:14:16,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:14:16,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-02-09 03:14:16,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383278577] [2022-02-09 03:14:16,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:14:16,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-09 03:14:16,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:14:16,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-09 03:14:16,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2022-02-09 03:14:16,377 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) [2022-02-09 03:14:18,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:14:18,834 INFO L93 Difference]: Finished difference Result 22478 states and 105898 transitions. [2022-02-09 03:14:18,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-09 03:14:18,834 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 [2022-02-09 03:14:18,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:14:18,912 INFO L225 Difference]: With dead ends: 22478 [2022-02-09 03:14:18,912 INFO L226 Difference]: Without dead ends: 22395 [2022-02-09 03:14:18,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=530, Invalid=4300, Unknown=0, NotChecked=0, Total=4830 [2022-02-09 03:14:18,913 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 757 mSDsluCounter, 3114 mSDsCounter, 0 mSdLazyCounter, 4108 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s 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, 1.4s IncrementalHoareTripleChecker+Time [2022-02-09 03:14:18,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [757 Valid, 1225 Invalid, 4250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 4108 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-09 03:14:18,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22395 states. [2022-02-09 03:14:19,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22395 to 20354. [2022-02-09 03:14:19,370 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) [2022-02-09 03:14:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20354 states to 20354 states and 97720 transitions. [2022-02-09 03:14:19,529 INFO L78 Accepts]: Start accepts. Automaton has 20354 states and 97720 transitions. Word has length 33 [2022-02-09 03:14:19,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:14:19,529 INFO L470 AbstractCegarLoop]: Abstraction has 20354 states and 97720 transitions. [2022-02-09 03:14:19,529 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) [2022-02-09 03:14:19,529 INFO L276 IsEmpty]: Start isEmpty. Operand 20354 states and 97720 transitions. [2022-02-09 03:14:19,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:14:19,587 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:14:19,587 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] [2022-02-09 03:14:19,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2022-02-09 03:14:19,803 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 [2022-02-09 03:14:19,803 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:14:19,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:14:19,804 INFO L85 PathProgramCache]: Analyzing trace with hash -833820615, now seen corresponding path program 132 times [2022-02-09 03:14:19,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:14:19,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027344811] [2022-02-09 03:14:19,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:14:19,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:14:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:14:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:19,962 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:14:19,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027344811] [2022-02-09 03:14:19,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027344811] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:14:19,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19385160] [2022-02-09 03:14:19,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:14:19,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:14:19,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:14:19,963 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) [2022-02-09 03:14:19,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-02-09 03:14:19,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-09 03:14:19,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:14:19,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-09 03:14:19,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:14:20,244 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-09 03:14:20,245 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 [2022-02-09 03:14:20,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:20,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:14:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:20,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19385160] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:14:20,653 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:14:20,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 29 [2022-02-09 03:14:20,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910811884] [2022-02-09 03:14:20,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:14:20,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-09 03:14:20,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:14:20,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-09 03:14:20,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-02-09 03:14:20,653 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) [2022-02-09 03:14:23,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:14:23,829 INFO L93 Difference]: Finished difference Result 23189 states and 108675 transitions. [2022-02-09 03:14:23,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-09 03:14:23,830 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 [2022-02-09 03:14:23,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:14:23,917 INFO L225 Difference]: With dead ends: 23189 [2022-02-09 03:14:23,917 INFO L226 Difference]: Without dead ends: 23143 [2022-02-09 03:14:23,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2083 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=926, Invalid=5880, Unknown=0, NotChecked=0, Total=6806 [2022-02-09 03:14:23,918 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 1048 mSDsluCounter, 2907 mSDsCounter, 0 mSdLazyCounter, 4023 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-02-09 03:14:23,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1048 Valid, 1252 Invalid, 4271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 4023 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-09 03:14:23,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23143 states. [2022-02-09 03:14:24,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23143 to 20486. [2022-02-09 03:14:24,462 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) [2022-02-09 03:14:24,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20486 states to 20486 states and 98417 transitions. [2022-02-09 03:14:24,614 INFO L78 Accepts]: Start accepts. Automaton has 20486 states and 98417 transitions. Word has length 33 [2022-02-09 03:14:24,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:14:24,614 INFO L470 AbstractCegarLoop]: Abstraction has 20486 states and 98417 transitions. [2022-02-09 03:14:24,614 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) [2022-02-09 03:14:24,614 INFO L276 IsEmpty]: Start isEmpty. Operand 20486 states and 98417 transitions. [2022-02-09 03:14:24,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:14:24,664 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:14:24,664 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] [2022-02-09 03:14:24,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2022-02-09 03:14:24,880 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 [2022-02-09 03:14:24,881 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:14:24,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:14:24,881 INFO L85 PathProgramCache]: Analyzing trace with hash -142914755, now seen corresponding path program 133 times [2022-02-09 03:14:24,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:14:24,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899778594] [2022-02-09 03:14:24,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:14:24,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:14:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:14:25,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:25,041 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:14:25,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899778594] [2022-02-09 03:14:25,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899778594] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:14:25,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406022726] [2022-02-09 03:14:25,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:14:25,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:14:25,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:14:25,043 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) [2022-02-09 03:14:25,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-02-09 03:14:25,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:14:25,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:14:25,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:14:25,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:14:25,565 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 [2022-02-09 03:14:25,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:25,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:14:25,997 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:14:25,997 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 27 treesize of output 48 [2022-02-09 03:14:26,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:14:26,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:14:26,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:14:26,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:14:26,050 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 [2022-02-09 03:14:26,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:26,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406022726] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:14:26,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:14:26,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-02-09 03:14:26,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512840511] [2022-02-09 03:14:26,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:14:26,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:14:26,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:14:26,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:14:26,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:14:26,103 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) [2022-02-09 03:14:28,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:14:28,754 INFO L93 Difference]: Finished difference Result 22037 states and 104508 transitions. [2022-02-09 03:14:28,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-09 03:14:28,755 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 [2022-02-09 03:14:28,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:14:28,838 INFO L225 Difference]: With dead ends: 22037 [2022-02-09 03:14:28,838 INFO L226 Difference]: Without dead ends: 21896 [2022-02-09 03:14:28,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=432, Invalid=4538, Unknown=0, NotChecked=0, Total=4970 [2022-02-09 03:14:28,839 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 496 mSDsluCounter, 3293 mSDsCounter, 0 mSdLazyCounter, 4361 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-02-09 03:14:28,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 1344 Invalid, 4436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 4361 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-09 03:14:28,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21896 states. [2022-02-09 03:14:29,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21896 to 20501. [2022-02-09 03:14:29,345 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) [2022-02-09 03:14:29,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20501 states to 20501 states and 98469 transitions. [2022-02-09 03:14:29,428 INFO L78 Accepts]: Start accepts. Automaton has 20501 states and 98469 transitions. Word has length 33 [2022-02-09 03:14:29,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:14:29,429 INFO L470 AbstractCegarLoop]: Abstraction has 20501 states and 98469 transitions. [2022-02-09 03:14:29,429 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) [2022-02-09 03:14:29,429 INFO L276 IsEmpty]: Start isEmpty. Operand 20501 states and 98469 transitions. [2022-02-09 03:14:29,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:14:29,621 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:14:29,621 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] [2022-02-09 03:14:29,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Forceful destruction successful, exit code 0 [2022-02-09 03:14:29,837 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 [2022-02-09 03:14:29,837 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:14:29,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:14:29,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1634186417, now seen corresponding path program 134 times [2022-02-09 03:14:29,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:14:29,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342724837] [2022-02-09 03:14:29,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:14:29,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:14:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:14:29,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:29,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:14:29,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342724837] [2022-02-09 03:14:29,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342724837] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:14:29,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668437713] [2022-02-09 03:14:29,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-09 03:14:29,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:14:29,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:14:29,965 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) [2022-02-09 03:14:29,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-02-09 03:14:30,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-09 03:14:30,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:14:30,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:14:30,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:14:30,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:14:30,417 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 [2022-02-09 03:14:30,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:30,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:14:30,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-09 03:14:30,916 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 [2022-02-09 03:14:30,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:14:30,923 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 [2022-02-09 03:14:30,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:30,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668437713] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:14:30,959 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:14:30,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 28 [2022-02-09 03:14:30,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425327416] [2022-02-09 03:14:30,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:14:30,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-09 03:14:30,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:14:30,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-09 03:14:30,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-02-09 03:14:30,970 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) [2022-02-09 03:14:32,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:14:32,313 INFO L93 Difference]: Finished difference Result 21133 states and 100911 transitions. [2022-02-09 03:14:32,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-09 03:14:32,313 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 [2022-02-09 03:14:32,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:14:32,395 INFO L225 Difference]: With dead ends: 21133 [2022-02-09 03:14:32,395 INFO L226 Difference]: Without dead ends: 21105 [2022-02-09 03:14:32,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=295, Invalid=1961, Unknown=0, NotChecked=0, Total=2256 [2022-02-09 03:14:32,396 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 425 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-02-09 03:14:32,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 743 Invalid, 2510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2266 Invalid, 0 Unknown, 187 Unchecked, 0.8s Time] [2022-02-09 03:14:32,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21105 states. [2022-02-09 03:14:32,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21105 to 20489. [2022-02-09 03:14:32,886 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) [2022-02-09 03:14:32,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20489 states to 20489 states and 98421 transitions. [2022-02-09 03:14:32,970 INFO L78 Accepts]: Start accepts. Automaton has 20489 states and 98421 transitions. Word has length 33 [2022-02-09 03:14:32,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:14:32,970 INFO L470 AbstractCegarLoop]: Abstraction has 20489 states and 98421 transitions. [2022-02-09 03:14:32,970 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) [2022-02-09 03:14:32,970 INFO L276 IsEmpty]: Start isEmpty. Operand 20489 states and 98421 transitions. [2022-02-09 03:14:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:14:33,144 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:14:33,144 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] [2022-02-09 03:14:33,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Forceful destruction successful, exit code 0 [2022-02-09 03:14:33,360 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 [2022-02-09 03:14:33,360 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:14:33,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:14:33,361 INFO L85 PathProgramCache]: Analyzing trace with hash 2072637043, now seen corresponding path program 135 times [2022-02-09 03:14:33,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:14:33,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520892200] [2022-02-09 03:14:33,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:14:33,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:14:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:14:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:33,570 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:14:33,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520892200] [2022-02-09 03:14:33,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520892200] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:14:33,570 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372185829] [2022-02-09 03:14:33,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-09 03:14:33,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:14:33,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:14:33,572 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) [2022-02-09 03:14:33,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-02-09 03:14:33,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-09 03:14:33,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:14:33,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2022-02-09 03:14:33,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:14:33,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:14:34,028 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-09 03:14:34,029 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 [2022-02-09 03:14:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:34,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:14:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:34,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372185829] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:14:34,688 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:14:34,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-02-09 03:14:34,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224235485] [2022-02-09 03:14:34,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:14:34,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:14:34,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:14:34,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:14:34,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:14:34,689 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) [2022-02-09 03:14:39,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:14:39,962 INFO L93 Difference]: Finished difference Result 24700 states and 115256 transitions. [2022-02-09 03:14:39,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-09 03:14:39,963 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 [2022-02-09 03:14:39,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:14:40,069 INFO L225 Difference]: With dead ends: 24700 [2022-02-09 03:14:40,069 INFO L226 Difference]: Without dead ends: 24630 [2022-02-09 03:14:40,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3274 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1063, Invalid=9443, Unknown=0, NotChecked=0, Total=10506 [2022-02-09 03:14:40,070 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1322 mSDsluCounter, 3986 mSDsCounter, 0 mSdLazyCounter, 5631 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s 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, 2.6s IncrementalHoareTripleChecker+Time [2022-02-09 03:14:40,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1322 Valid, 1636 Invalid, 5920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 5631 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-09 03:14:40,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24630 states. [2022-02-09 03:14:40,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24630 to 20629. [2022-02-09 03:14:40,697 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) [2022-02-09 03:14:40,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20629 states to 20629 states and 99272 transitions. [2022-02-09 03:14:40,785 INFO L78 Accepts]: Start accepts. Automaton has 20629 states and 99272 transitions. Word has length 33 [2022-02-09 03:14:40,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:14:40,785 INFO L470 AbstractCegarLoop]: Abstraction has 20629 states and 99272 transitions. [2022-02-09 03:14:40,785 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) [2022-02-09 03:14:40,785 INFO L276 IsEmpty]: Start isEmpty. Operand 20629 states and 99272 transitions. [2022-02-09 03:14:40,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:14:40,838 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:14:40,838 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] [2022-02-09 03:14:40,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2022-02-09 03:14:41,054 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 [2022-02-09 03:14:41,054 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:14:41,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:14:41,055 INFO L85 PathProgramCache]: Analyzing trace with hash -919057647, now seen corresponding path program 136 times [2022-02-09 03:14:41,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:14:41,055 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351228948] [2022-02-09 03:14:41,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:14:41,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:14:41,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:14:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:41,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:14:41,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351228948] [2022-02-09 03:14:41,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351228948] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:14:41,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467928838] [2022-02-09 03:14:41,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-09 03:14:41,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:14:41,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:14:41,278 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) [2022-02-09 03:14:41,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-02-09 03:14:41,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-09 03:14:41,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:14:41,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:14:41,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:14:41,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:14:41,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-02-09 03:14:41,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:41,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:14:41,974 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:14:41,975 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 [2022-02-09 03:14:42,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:14:42,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:14:42,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:14:42,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:14:42,159 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 [2022-02-09 03:14:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:42,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467928838] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:14:42,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:14:42,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-02-09 03:14:42,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466316211] [2022-02-09 03:14:42,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:14:42,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-09 03:14:42,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:14:42,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-09 03:14:42,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2022-02-09 03:14:42,192 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) [2022-02-09 03:14:44,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:14:44,861 INFO L93 Difference]: Finished difference Result 23201 states and 109217 transitions. [2022-02-09 03:14:44,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-09 03:14:44,861 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 [2022-02-09 03:14:44,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:14:44,988 INFO L225 Difference]: With dead ends: 23201 [2022-02-09 03:14:44,988 INFO L226 Difference]: Without dead ends: 22886 [2022-02-09 03:14:44,989 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 [2022-02-09 03:14:44,989 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, 1.7s IncrementalHoareTripleChecker+Time [2022-02-09 03:14:44,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 1448 Invalid, 4942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 4828 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-09 03:14:45,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22886 states. [2022-02-09 03:14:45,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22886 to 20740. [2022-02-09 03:14:45,494 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) [2022-02-09 03:14:45,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20740 states to 20740 states and 99834 transitions. [2022-02-09 03:14:45,578 INFO L78 Accepts]: Start accepts. Automaton has 20740 states and 99834 transitions. Word has length 33 [2022-02-09 03:14:45,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:14:45,578 INFO L470 AbstractCegarLoop]: Abstraction has 20740 states and 99834 transitions. [2022-02-09 03:14:45,578 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) [2022-02-09 03:14:45,578 INFO L276 IsEmpty]: Start isEmpty. Operand 20740 states and 99834 transitions. [2022-02-09 03:14:45,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:14:45,626 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:14:45,626 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] [2022-02-09 03:14:45,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2022-02-09 03:14:45,839 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 [2022-02-09 03:14:45,840 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:14:45,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:14:45,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1703097933, now seen corresponding path program 137 times [2022-02-09 03:14:45,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:14:45,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042533643] [2022-02-09 03:14:45,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:14:45,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:14:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:14:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:46,034 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:14:46,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042533643] [2022-02-09 03:14:46,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042533643] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:14:46,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770561625] [2022-02-09 03:14:46,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-09 03:14:46,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:14:46,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:14:46,035 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) [2022-02-09 03:14:46,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-02-09 03:14:46,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-09 03:14:46,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:14:46,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:14:46,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:14:46,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:14:46,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2022-02-09 03:14:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:46,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:14:46,647 INFO L353 Elim1Store]: treesize reduction 36, result has 50.7 percent of original size [2022-02-09 03:14:46,648 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 [2022-02-09 03:14:46,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:14:46,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-09 03:14:46,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:14:46,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:14:46,688 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 [2022-02-09 03:14:46,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:46,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770561625] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:14:46,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:14:46,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-02-09 03:14:46,724 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796920295] [2022-02-09 03:14:46,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:14:46,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-09 03:14:46,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:14:46,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-09 03:14:46,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2022-02-09 03:14:46,725 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) [2022-02-09 03:14:50,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:14:50,546 INFO L93 Difference]: Finished difference Result 22383 states and 106307 transitions. [2022-02-09 03:14:50,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-09 03:14:50,546 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 [2022-02-09 03:14:50,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:14:50,647 INFO L225 Difference]: With dead ends: 22383 [2022-02-09 03:14:50,647 INFO L226 Difference]: Without dead ends: 22212 [2022-02-09 03:14:50,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1882 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=602, Invalid=6040, Unknown=0, NotChecked=0, Total=6642 [2022-02-09 03:14:50,648 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 648 mSDsluCounter, 3415 mSDsCounter, 0 mSdLazyCounter, 4501 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 2.0s IncrementalHoareTripleChecker+Time [2022-02-09 03:14:50,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 1424 Invalid, 4800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 4501 Invalid, 0 Unknown, 167 Unchecked, 2.0s Time] [2022-02-09 03:14:50,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22212 states. [2022-02-09 03:14:51,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22212 to 20845. [2022-02-09 03:14:51,182 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) [2022-02-09 03:14:51,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20845 states to 20845 states and 100332 transitions. [2022-02-09 03:14:51,387 INFO L78 Accepts]: Start accepts. Automaton has 20845 states and 100332 transitions. Word has length 33 [2022-02-09 03:14:51,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:14:51,387 INFO L470 AbstractCegarLoop]: Abstraction has 20845 states and 100332 transitions. [2022-02-09 03:14:51,388 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) [2022-02-09 03:14:51,388 INFO L276 IsEmpty]: Start isEmpty. Operand 20845 states and 100332 transitions. [2022-02-09 03:14:51,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:14:51,443 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:14:51,443 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] [2022-02-09 03:14:51,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Ended with exit code 0 [2022-02-09 03:14:51,659 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 [2022-02-09 03:14:51,659 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:14:51,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:14:51,660 INFO L85 PathProgramCache]: Analyzing trace with hash 2028271939, now seen corresponding path program 138 times [2022-02-09 03:14:51,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:14:51,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624297647] [2022-02-09 03:14:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:14:51,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:14:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:14:51,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:51,850 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:14:51,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624297647] [2022-02-09 03:14:51,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624297647] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:14:51,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351915807] [2022-02-09 03:14:51,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-09 03:14:51,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:14:51,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:14:51,851 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) [2022-02-09 03:14:51,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-02-09 03:14:51,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-09 03:14:51,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-09 03:14:51,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:14:51,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 03:14:52,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-09 03:14:52,240 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-02-09 03:14:52,240 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 [2022-02-09 03:14:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:52,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 03:14:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 03:14:52,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351915807] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 03:14:52,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 03:14:52,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-02-09 03:14:52,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090644649] [2022-02-09 03:14:52,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 03:14:52,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-09 03:14:52,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 03:14:52,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-09 03:14:52,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2022-02-09 03:14:52,925 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) [2022-02-09 03:14:57,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-09 03:14:57,285 INFO L93 Difference]: Finished difference Result 23637 states and 111408 transitions. [2022-02-09 03:14:57,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-09 03:14:57,285 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 [2022-02-09 03:14:57,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-09 03:14:57,376 INFO L225 Difference]: With dead ends: 23637 [2022-02-09 03:14:57,376 INFO L226 Difference]: Without dead ends: 23535 [2022-02-09 03:14:57,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2821 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=880, Invalid=8432, Unknown=0, NotChecked=0, Total=9312 [2022-02-09 03:14:57,377 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 [2022-02-09 03:14:57,377 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] [2022-02-09 03:14:57,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23535 states. [2022-02-09 03:14:57,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23535 to 21118. [2022-02-09 03:14:57,933 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) [2022-02-09 03:14:58,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21118 states to 21118 states and 101702 transitions. [2022-02-09 03:14:58,026 INFO L78 Accepts]: Start accepts. Automaton has 21118 states and 101702 transitions. Word has length 33 [2022-02-09 03:14:58,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-09 03:14:58,026 INFO L470 AbstractCegarLoop]: Abstraction has 21118 states and 101702 transitions. [2022-02-09 03:14:58,026 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) [2022-02-09 03:14:58,026 INFO L276 IsEmpty]: Start isEmpty. Operand 21118 states and 101702 transitions. [2022-02-09 03:14:58,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-09 03:14:58,246 INFO L506 BasicCegarLoop]: Found error trace [2022-02-09 03:14:58,246 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] [2022-02-09 03:14:58,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2022-02-09 03:14:58,462 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 [2022-02-09 03:14:58,463 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2022-02-09 03:14:58,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 03:14:58,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1947014503, now seen corresponding path program 139 times [2022-02-09 03:14:58,463 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 03:14:58,463 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926710874] [2022-02-09 03:14:58,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 03:14:58,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 03:14:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:14:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-09 03:14:58,653 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 03:14:58,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926710874] [2022-02-09 03:14:58,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926710874] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 03:14:58,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788059940] [2022-02-09 03:14:58,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-09 03:14:58,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 03:14:58,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 03:14:58,654 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) [2022-02-09 03:14:58,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-02-09 03:14:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 03:14:58,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-09 03:14:58,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2022-02-09 03:14:59,125 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (10 of 11 remaining) [2022-02-09 03:14:59,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2022-02-09 03:14:59,156 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-09 03:14:59,171 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 [2022-02-09 03:14:59,325 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 [2022-02-09 03:14:59,326 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 22 known predicates. [2022-02-09 03:14:59,327 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4INUSE_VIOLATION (9 of 11 remaining) [2022-02-09 03:14:59,327 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err6INUSE_VIOLATION (8 of 11 remaining) [2022-02-09 03:14:59,328 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (7 of 11 remaining) [2022-02-09 03:14:59,328 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7INUSE_VIOLATION (6 of 11 remaining) [2022-02-09 03:14:59,328 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err0INUSE_VIOLATION (5 of 11 remaining) [2022-02-09 03:14:59,328 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err8INUSE_VIOLATION (4 of 11 remaining) [2022-02-09 03:14:59,328 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Thread1of1ForFork1Err3INUSE_VIOLATION (3 of 11 remaining) [2022-02-09 03:14:59,328 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Thread1of1ForFork1Err5INUSE_VIOLATION (2 of 11 remaining) [2022-02-09 03:14:59,328 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Thread1of1ForFork4Err1INUSE_VIOLATION (1 of 11 remaining) [2022-02-09 03:14:59,328 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Thread1of1ForFork4Err9INUSE_VIOLATION (0 of 11 remaining) [2022-02-09 03:14:59,331 INFO L732 BasicCegarLoop]: Path program histogram: [139, 30, 29, 28, 19, 3, 2, 2, 2, 1, 1] [2022-02-09 03:14:59,333 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-09 03:14:59,333 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-09 03:14:59,334 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.02 03:14:59 BasicIcfg [2022-02-09 03:14:59,335 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-09 03:14:59,335 INFO L158 Benchmark]: Toolchain (without parser) took 873698.41ms. Allocated memory was 220.2MB in the beginning and 4.4GB in the end (delta: 4.2GB). Free memory was 182.9MB in the beginning and 3.1GB in the end (delta: -2.9GB). Peak memory consumption was 1.2GB. Max. memory is 8.0GB. [2022-02-09 03:14:59,335 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 220.2MB. Free memory is still 184.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-09 03:14:59,335 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.29ms. Allocated memory is still 220.2MB. Free memory was 182.9MB in the beginning and 181.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-09 03:14:59,335 INFO L158 Benchmark]: Boogie Preprocessor took 36.79ms. Allocated memory is still 220.2MB. Free memory was 181.3MB in the beginning and 180.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-09 03:14:59,335 INFO L158 Benchmark]: RCFGBuilder took 285.91ms. Allocated memory is still 220.2MB. Free memory was 180.3MB in the beginning and 169.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-09 03:14:59,335 INFO L158 Benchmark]: TraceAbstraction took 873340.50ms. Allocated memory was 220.2MB in the beginning and 4.4GB in the end (delta: 4.2GB). Free memory was 169.1MB in the beginning and 3.1GB in the end (delta: -3.0GB). Peak memory consumption was 1.2GB. Max. memory is 8.0GB. [2022-02-09 03:14:59,335 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 0.13ms. Allocated memory is still 220.2MB. Free memory is still 184.2MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 31.29ms. Allocated memory is still 220.2MB. Free memory was 182.9MB in the beginning and 181.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.79ms. Allocated memory is still 220.2MB. Free memory was 181.3MB in the beginning and 180.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 285.91ms. Allocated memory is still 220.2MB. Free memory was 180.3MB in the beginning and 169.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 873340.50ms. Allocated memory was 220.2MB in the beginning and 4.4GB in the end (delta: 4.2GB). Free memory was 169.1MB in the beginning and 3.1GB in the end (delta: -3.0GB). Peak memory consumption was 1.2GB. 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 analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 22 known predicates. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 22 known predicates. - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 22 known predicates. - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 22 known predicates. - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 22 known predicates. - TimeoutResultAtElement [Line: 87]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 22 known predicates. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 22 known predicates. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 22 known predicates. - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 22 known predicates. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 22 known predicates. - TimeoutResultAtElement [Line: 87]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 22 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 13 procedures, 76 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 873.2s, OverallIterations: 256, TraceHistogramMax: 2, PathProgramHistogramMax: 139, EmptinessCheckTime: 6.2s, AutomataDifference: 520.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 138539 SdHoareTripleChecker+Valid, 276.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 138539 mSDsluCounter, 218681 SdHoareTripleChecker+Invalid, 232.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 20693 IncrementalHoareTripleChecker+Unchecked, 537041 mSDsCounter, 21847 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 690649 IncrementalHoareTripleChecker+Invalid, 733189 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21847 mSolverCounterUnsat, 13611 mSDtfsCounter, 690649 mSolverCounterSat, 2.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 24932 GetRequests, 11236 SyntacticMatches, 897 SemanticMatches, 12799 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236943 ImplicationChecksByTransitivity, 289.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21118occurred in iteration=255, InterpolantAutomatonStates: 10151, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 65.1s AutomataMinimizationTime, 255 MinimizatonAttempts, 344315 StatesRemovedByMinimization, 255 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.5s SsaConstructionTime, 4.0s SatisfiabilityAnalysisTime, 214.4s InterpolantComputationTime, 15659 NumberOfCodeBlocks, 15659 NumberOfCodeBlocksAsserted, 812 NumberOfCheckSat, 22668 ConstructedInterpolants, 311 QuantifiedInterpolants, 413594 SizeOfPredicates, 3315 NumberOfNonLiveVariables, 33799 ConjunctsInSsa, 8529 ConjunctsInUnsatCore, 755 InterpolantComputations, 5 PerfectInterpolantSequences, 80/3822 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